/usr/bin/java -Xmx8000000000 -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/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:59:40,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:59:40,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:59:40,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:59:40,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:59:40,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:59:40,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:59:40,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:59:40,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:59:40,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:59:40,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:59:40,811 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:59:40,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:59:40,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:59:40,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:59:40,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:59:40,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:59:40,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:59:40,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:59:40,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:59:40,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:59:40,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:59:40,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:59:40,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:59:41,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:59:41,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:59:41,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:59:41,070 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:59:41,071 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:59:41,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-06-12 20:59:41,071 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-06-12 20:59:41,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:59:41,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:59:41,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:41,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:59:41,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:59:41,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:41,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:59:41,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:59:41,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:59:41,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... [2021-06-12 20:59:41,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:59:41,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:59:41,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:59:41,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:59:41,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:59:41,195 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:59:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:59:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:59:41,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:59:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:59:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:59:41,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:59:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:59:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:59:41,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:59:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:59:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:59:41,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:59:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:59:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:59:41,198 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:59:41,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:59:41,339 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:59:41,340 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:41 BoogieIcfgContainer [2021-06-12 20:59:41,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:59:41,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:59:41,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:59:41,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:59:41,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:41" (1/2) ... [2021-06-12 20:59:41,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714930c9 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:59:41, skipping insertion in model container [2021-06-12 20:59:41,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:41" (2/2) ... [2021-06-12 20:59:41,345 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-06-12 20:59:41,348 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:59:41,349 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:59:41,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:59:41,349 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:59:41,379 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 20:59:41,392 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 20:59:41,404 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:59:41,404 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:59:41,404 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:59:41,404 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:59:41,405 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:59:41,405 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:59:41,405 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:59:41,405 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:59:41,411 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-06-12 20:59:41,478 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:59:41,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:41,494 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:41,494 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -305625672, now seen corresponding path program 1 times [2021-06-12 20:59:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:41,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432746571] [2021-06-12 20:59:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:41,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:41,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432746571] [2021-06-12 20:59:41,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432746571] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:41,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:41,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755165663] [2021-06-12 20:59:41,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:59:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:59:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:59:41,608 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:41,664 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-06-12 20:59:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:59:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:59:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:41,681 INFO L225 Difference]: With dead ends: 857 [2021-06-12 20:59:41,681 INFO L226 Difference]: Without dead ends: 732 [2021-06-12 20:59:41,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:59:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-12 20:59:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-06-12 20:59:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-06-12 20:59:41,785 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-06-12 20:59:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:41,785 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-06-12 20:59:41,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-06-12 20:59:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:59:41,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:41,790 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:41,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:59:41,791 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash 678047094, now seen corresponding path program 1 times [2021-06-12 20:59:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:41,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110036961] [2021-06-12 20:59:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:41,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110036961] [2021-06-12 20:59:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110036961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:41,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517779704] [2021-06-12 20:59:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:42,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517779704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:42,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-12 20:59:42,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233520913] [2021-06-12 20:59:42,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:42,047 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:42,110 INFO L93 Difference]: Finished difference Result 1139 states and 4149 transitions. [2021-06-12 20:59:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:59:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:59:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:42,116 INFO L225 Difference]: With dead ends: 1139 [2021-06-12 20:59:42,116 INFO L226 Difference]: Without dead ends: 1139 [2021-06-12 20:59:42,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-12 20:59:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 788. [2021-06-12 20:59:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.7255400254129607) internal successors, (2932), 787 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2932 transitions. [2021-06-12 20:59:42,149 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2932 transitions. Word has length 24 [2021-06-12 20:59:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:42,149 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2932 transitions. [2021-06-12 20:59:42,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2932 transitions. [2021-06-12 20:59:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:59:42,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:42,153 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:42,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 20:59:42,361 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1310430090, now seen corresponding path program 1 times [2021-06-12 20:59:42,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:42,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030321064] [2021-06-12 20:59:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:42,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:42,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030321064] [2021-06-12 20:59:42,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030321064] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:42,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:42,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:59:42,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455996173] [2021-06-12 20:59:42,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:42,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:42,416 INFO L87 Difference]: Start difference. First operand 788 states and 2932 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:42,451 INFO L93 Difference]: Finished difference Result 732 states and 2639 transitions. [2021-06-12 20:59:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:59:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:42,455 INFO L225 Difference]: With dead ends: 732 [2021-06-12 20:59:42,455 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:59:42,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:59:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 614. [2021-06-12 20:59:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.8140293637846656) internal successors, (2338), 613 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2338 transitions. [2021-06-12 20:59:42,471 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2338 transitions. Word has length 24 [2021-06-12 20:59:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:42,471 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2338 transitions. [2021-06-12 20:59:42,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2338 transitions. [2021-06-12 20:59:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:59:42,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:42,473 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:42,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:59:42,474 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 2 times [2021-06-12 20:59:42,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:42,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296410511] [2021-06-12 20:59:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:42,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:42,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296410511] [2021-06-12 20:59:42,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296410511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079338359] [2021-06-12 20:59:42,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:42,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:42,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:42,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079338359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:42,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-12 20:59:42,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119415379] [2021-06-12 20:59:42,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:42,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:42,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:42,695 INFO L87 Difference]: Start difference. First operand 614 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:42,754 INFO L93 Difference]: Finished difference Result 782 states and 3002 transitions. [2021-06-12 20:59:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:59:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:59:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:42,759 INFO L225 Difference]: With dead ends: 782 [2021-06-12 20:59:42,759 INFO L226 Difference]: Without dead ends: 782 [2021-06-12 20:59:42,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-12 20:59:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 690. [2021-06-12 20:59:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.8403483309143684) internal successors, (2646), 689 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2646 transitions. [2021-06-12 20:59:42,779 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2646 transitions. Word has length 24 [2021-06-12 20:59:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:42,779 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 2646 transitions. [2021-06-12 20:59:42,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2646 transitions. [2021-06-12 20:59:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:59:42,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:42,781 INFO L472 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] [2021-06-12 20:59:42,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:42,998 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -893707084, now seen corresponding path program 1 times [2021-06-12 20:59:42,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:42,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654485722] [2021-06-12 20:59:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:43,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654485722] [2021-06-12 20:59:43,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654485722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451404051] [2021-06-12 20:59:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:43,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451404051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:43,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:43,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-12 20:59:43,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483419453] [2021-06-12 20:59:43,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:43,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:43,207 INFO L87 Difference]: Start difference. First operand 690 states and 2646 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:43,263 INFO L93 Difference]: Finished difference Result 1377 states and 5182 transitions. [2021-06-12 20:59:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:59:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 26 [2021-06-12 20:59:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:43,269 INFO L225 Difference]: With dead ends: 1377 [2021-06-12 20:59:43,270 INFO L226 Difference]: Without dead ends: 1377 [2021-06-12 20:59:43,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-12 20:59:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 834. [2021-06-12 20:59:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.8739495798319328) internal successors, (3227), 833 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 3227 transitions. [2021-06-12 20:59:43,292 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 3227 transitions. Word has length 26 [2021-06-12 20:59:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:43,292 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 3227 transitions. [2021-06-12 20:59:43,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 3227 transitions. [2021-06-12 20:59:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:59:43,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:43,294 INFO L472 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] [2021-06-12 20:59:43,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:43,511 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash 400399100, now seen corresponding path program 2 times [2021-06-12 20:59:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509655911] [2021-06-12 20:59:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:43,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:43,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509655911] [2021-06-12 20:59:43,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509655911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:43,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987668911] [2021-06-12 20:59:43,557 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:43,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:43,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:43,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987668911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:43,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:43,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-12 20:59:43,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887209488] [2021-06-12 20:59:43,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:43,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:43,659 INFO L87 Difference]: Start difference. First operand 834 states and 3227 transitions. Second operand has 9 states, 9 states have (on average 4.0) 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) [2021-06-12 20:59:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:43,718 INFO L93 Difference]: Finished difference Result 1397 states and 5229 transitions. [2021-06-12 20:59:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:59:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) 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 26 [2021-06-12 20:59:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:43,725 INFO L225 Difference]: With dead ends: 1397 [2021-06-12 20:59:43,725 INFO L226 Difference]: Without dead ends: 1397 [2021-06-12 20:59:43,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-12 20:59:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 834. [2021-06-12 20:59:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.843937575030012) internal successors, (3202), 833 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 3202 transitions. [2021-06-12 20:59:43,748 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 3202 transitions. Word has length 26 [2021-06-12 20:59:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:43,748 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 3202 transitions. [2021-06-12 20:59:43,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) 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) [2021-06-12 20:59:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 3202 transitions. [2021-06-12 20:59:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:59:43,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:43,750 INFO L472 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] [2021-06-12 20:59:43,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:43,969 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -832220860, now seen corresponding path program 3 times [2021-06-12 20:59:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:43,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090513339] [2021-06-12 20:59:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:43,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:43,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090513339] [2021-06-12 20:59:43,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090513339] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:43,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:43,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:59:43,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33320133] [2021-06-12 20:59:43,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:43,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:43,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:43,997 INFO L87 Difference]: Start difference. First operand 834 states and 3202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:44,024 INFO L93 Difference]: Finished difference Result 958 states and 3592 transitions. [2021-06-12 20:59:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:59:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:44,028 INFO L225 Difference]: With dead ends: 958 [2021-06-12 20:59:44,028 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 20:59:44,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 20:59:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 802. [2021-06-12 20:59:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-06-12 20:59:44,045 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-06-12 20:59:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:44,045 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-06-12 20:59:44,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-06-12 20:59:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:59:44,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:44,047 INFO L472 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, 1] [2021-06-12 20:59:44,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:59:44,047 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash -322922564, now seen corresponding path program 1 times [2021-06-12 20:59:44,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:44,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722767283] [2021-06-12 20:59:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:44,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:44,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722767283] [2021-06-12 20:59:44,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722767283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694648317] [2021-06-12 20:59:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:44,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694648317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:44,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-12 20:59:44,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456457780] [2021-06-12 20:59:44,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:59:44,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:44,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:59:44,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:44,175 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:44,239 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-06-12 20:59:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:59:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:59:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:44,246 INFO L225 Difference]: With dead ends: 1509 [2021-06-12 20:59:44,246 INFO L226 Difference]: Without dead ends: 1509 [2021-06-12 20:59:44,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-12 20:59:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-06-12 20:59:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-06-12 20:59:44,268 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-06-12 20:59:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:44,269 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-06-12 20:59:44,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-06-12 20:59:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:59:44,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:44,271 INFO L472 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, 1] [2021-06-12 20:59:44,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,489 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-06-12 20:59:44,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:44,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221530362] [2021-06-12 20:59:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:44,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:44,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221530362] [2021-06-12 20:59:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221530362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613807159] [2021-06-12 20:59:44,539 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:44,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613807159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:44,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:59:44,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-12 20:59:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559067312] [2021-06-12 20:59:44,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:44,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:44,644 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:44,689 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-06-12 20:59:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:59:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:44,697 INFO L225 Difference]: With dead ends: 1136 [2021-06-12 20:59:44,698 INFO L226 Difference]: Without dead ends: 1088 [2021-06-12 20:59:44,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-12 20:59:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-06-12 20:59:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-06-12 20:59:44,716 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-06-12 20:59:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:44,716 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-06-12 20:59:44,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-06-12 20:59:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:59:44,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:44,719 INFO L472 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, 1, 1, 1] [2021-06-12 20:59:44,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,929 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1950742974, now seen corresponding path program 1 times [2021-06-12 20:59:44,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:44,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467348456] [2021-06-12 20:59:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:44,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467348456] [2021-06-12 20:59:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467348456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725866767] [2021-06-12 20:59:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:59:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:45,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725866767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:45,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:45,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-12 20:59:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706592649] [2021-06-12 20:59:45,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:45,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:45,094 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:45,175 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-06-12 20:59:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:45,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 30 [2021-06-12 20:59:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:45,204 INFO L225 Difference]: With dead ends: 4025 [2021-06-12 20:59:45,204 INFO L226 Difference]: Without dead ends: 3705 [2021-06-12 20:59:45,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-12 20:59:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-06-12 20:59:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-06-12 20:59:45,274 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-06-12 20:59:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:45,274 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-06-12 20:59:45,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-06-12 20:59:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:45,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:45,280 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:59:45,497 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 756745084, now seen corresponding path program 2 times [2021-06-12 20:59:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370952093] [2021-06-12 20:59:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:45,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370952093] [2021-06-12 20:59:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370952093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103956314] [2021-06-12 20:59:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:45,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103956314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:45,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 20:59:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570628279] [2021-06-12 20:59:45,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:59:45,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:59:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:59:45,691 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:45,927 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-06-12 20:59:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:59:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 32 [2021-06-12 20:59:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:45,963 INFO L225 Difference]: With dead ends: 11823 [2021-06-12 20:59:45,963 INFO L226 Difference]: Without dead ends: 11823 [2021-06-12 20:59:45,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:59:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-06-12 20:59:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-06-12 20:59:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-06-12 20:59:46,133 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-06-12 20:59:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:46,133 INFO L482 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-06-12 20:59:46,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-06-12 20:59:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:46,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:46,143 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:46,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 20:59:46,357 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1287025088, now seen corresponding path program 3 times [2021-06-12 20:59:46,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:46,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854714877] [2021-06-12 20:59:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:46,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854714877] [2021-06-12 20:59:46,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854714877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283569384] [2021-06-12 20:59:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:59:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:46,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283569384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:46,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:46,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 20:59:46,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232674484] [2021-06-12 20:59:46,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:46,531 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:47,185 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-06-12 20:59:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:59:47,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 32 [2021-06-12 20:59:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:47,237 INFO L225 Difference]: With dead ends: 18640 [2021-06-12 20:59:47,237 INFO L226 Difference]: Without dead ends: 17252 [2021-06-12 20:59:47,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:59:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-06-12 20:59:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-06-12 20:59:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-06-12 20:59:47,527 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-06-12 20:59:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:47,527 INFO L482 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-06-12 20:59:47,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-06-12 20:59:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:47,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:47,544 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:47,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:47,752 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-06-12 20:59:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:47,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862647809] [2021-06-12 20:59:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:47,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862647809] [2021-06-12 20:59:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862647809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075005272] [2021-06-12 20:59:47,861 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:47,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:47,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075005272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:47,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:47,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 20:59:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506048098] [2021-06-12 20:59:47,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:47,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:47,976 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:48,141 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-06-12 20:59:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:59:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 32 [2021-06-12 20:59:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:48,177 INFO L225 Difference]: With dead ends: 13296 [2021-06-12 20:59:48,178 INFO L226 Difference]: Without dead ends: 13128 [2021-06-12 20:59:48,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:59:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-06-12 20:59:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-06-12 20:59:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-06-12 20:59:48,408 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-06-12 20:59:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:48,409 INFO L482 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-06-12 20:59:48,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-06-12 20:59:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:48,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:48,426 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:48,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:48,643 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-06-12 20:59:48,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:48,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480796763] [2021-06-12 20:59:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:48,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480796763] [2021-06-12 20:59:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480796763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988918566] [2021-06-12 20:59:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:48,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:59:48,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:48,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:48,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988918566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:48,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:48,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-12 20:59:48,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9645681] [2021-06-12 20:59:48,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:48,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:48,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:48,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:48,825 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:49,051 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-06-12 20:59:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:59:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 32 [2021-06-12 20:59:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:49,100 INFO L225 Difference]: With dead ends: 17125 [2021-06-12 20:59:49,100 INFO L226 Difference]: Without dead ends: 17125 [2021-06-12 20:59:49,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:59:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-06-12 20:59:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-06-12 20:59:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-06-12 20:59:49,405 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-06-12 20:59:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:49,406 INFO L482 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-06-12 20:59:49,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-06-12 20:59:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:49,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:49,427 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:49,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:59:49,645 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-06-12 20:59:49,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:49,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312265083] [2021-06-12 20:59:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:49,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312265083] [2021-06-12 20:59:49,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312265083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743989591] [2021-06-12 20:59:49,680 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:49,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:59:49,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743989591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:49,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:49,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 20:59:49,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054979049] [2021-06-12 20:59:49,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:49,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:49,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:49,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:49,858 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:50,021 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-06-12 20:59:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:59:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 32 [2021-06-12 20:59:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:50,061 INFO L225 Difference]: With dead ends: 16571 [2021-06-12 20:59:50,061 INFO L226 Difference]: Without dead ends: 16190 [2021-06-12 20:59:50,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:59:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-06-12 20:59:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-06-12 20:59:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-06-12 20:59:50,326 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-06-12 20:59:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:50,326 INFO L482 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-06-12 20:59:50,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-06-12 20:59:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:50,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:50,349 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:50,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:59:50,566 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-06-12 20:59:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:50,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134964190] [2021-06-12 20:59:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:50,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:50,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134964190] [2021-06-12 20:59:50,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134964190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:50,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852368897] [2021-06-12 20:59:50,606 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:50,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852368897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:50,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:50,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 20:59:50,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823375135] [2021-06-12 20:59:50,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:50,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:50,713 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:50,950 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-06-12 20:59:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:59:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 32 [2021-06-12 20:59:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:50,996 INFO L225 Difference]: With dead ends: 19431 [2021-06-12 20:59:50,996 INFO L226 Difference]: Without dead ends: 19035 [2021-06-12 20:59:50,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:59:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-06-12 20:59:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-06-12 20:59:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-06-12 20:59:51,471 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-06-12 20:59:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:51,471 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-06-12 20:59:51,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-06-12 20:59:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:51,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:51,509 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:51,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:59:51,711 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-06-12 20:59:51,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:51,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601203332] [2021-06-12 20:59:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:51,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:51,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601203332] [2021-06-12 20:59:51,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601203332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:51,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000219117] [2021-06-12 20:59:51,752 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:51,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000219117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:51,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:51,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 20:59:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142219291] [2021-06-12 20:59:51,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:51,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:51,889 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:52,171 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-06-12 20:59:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:53,053 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-06-12 20:59:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:59:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 32 [2021-06-12 20:59:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:53,318 INFO L225 Difference]: With dead ends: 59639 [2021-06-12 20:59:53,318 INFO L226 Difference]: Without dead ends: 58849 [2021-06-12 20:59:53,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:59:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-06-12 20:59:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-06-12 20:59:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-06-12 20:59:54,344 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-06-12 20:59:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:54,344 INFO L482 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-06-12 20:59:54,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-06-12 20:59:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:59:54,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:54,400 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:54,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:54,601 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-06-12 20:59:54,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:54,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871947012] [2021-06-12 20:59:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:54,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871947012] [2021-06-12 20:59:54,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871947012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312278917] [2021-06-12 20:59:54,647 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:54,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:59:54,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:54,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312278917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:54,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:54,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-12 20:59:54,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084513733] [2021-06-12 20:59:54,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:54,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:54,755 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:54,963 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:59:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:55,156 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-06-12 20:59:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:59:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 32 [2021-06-12 20:59:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:55,240 INFO L225 Difference]: With dead ends: 31277 [2021-06-12 20:59:55,240 INFO L226 Difference]: Without dead ends: 30802 [2021-06-12 20:59:55,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:59:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-12 20:59:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-06-12 20:59:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-06-12 20:59:55,921 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-06-12 20:59:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:55,922 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-06-12 20:59:55,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-06-12 20:59:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:59:55,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:55,967 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:56,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:59:56,177 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-06-12 20:59:56,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:56,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759299331] [2021-06-12 20:59:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:59:56,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759299331] [2021-06-12 20:59:56,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759299331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706995103] [2021-06-12 20:59:56,205 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:56,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:59:56,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706995103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:56,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:56,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 20:59:56,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310123705] [2021-06-12 20:59:56,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:56,315 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:56,857 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2021-06-12 20:59:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:57,314 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-06-12 20:59:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:59:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 34 [2021-06-12 20:59:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:57,494 INFO L225 Difference]: With dead ends: 54817 [2021-06-12 20:59:57,494 INFO L226 Difference]: Without dead ends: 53957 [2021-06-12 20:59:57,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:59:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-06-12 20:59:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-06-12 20:59:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-06-12 20:59:58,650 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-06-12 20:59:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:58,650 INFO L482 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-06-12 20:59:58,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-06-12 20:59:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:59:58,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:58,715 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:58,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:58,916 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-06-12 20:59:58,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:58,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885810579] [2021-06-12 20:59:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:58,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:58,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885810579] [2021-06-12 20:59:58,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885810579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:58,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155777418] [2021-06-12 20:59:58,969 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:59,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:59:59,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:59:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155777418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:59,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:59,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 20:59:59,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358117672] [2021-06-12 20:59:59,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:59,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:59,209 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:00,194 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-06-12 21:00:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:00:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 34 [2021-06-12 21:00:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:00,381 INFO L225 Difference]: With dead ends: 59653 [2021-06-12 21:00:00,381 INFO L226 Difference]: Without dead ends: 58480 [2021-06-12 21:00:00,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:00:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-06-12 21:00:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-06-12 21:00:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-06-12 21:00:01,472 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-06-12 21:00:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:01,472 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-06-12 21:00:01,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-06-12 21:00:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:00:01,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:01,548 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:01,749 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1777521988, now seen corresponding path program 12 times [2021-06-12 21:00:01,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:01,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241423458] [2021-06-12 21:00:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 21:00:01,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241423458] [2021-06-12 21:00:01,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241423458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724253082] [2021-06-12 21:00:01,856 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:01,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:00:01,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:00:01,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:00:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724253082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-12 21:00:02,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101565276] [2021-06-12 21:00:02,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:00:02,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:00:02,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:00:02,165 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:03,211 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-06-12 21:00:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:00:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 36 [2021-06-12 21:00:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:03,732 INFO L225 Difference]: With dead ends: 101501 [2021-06-12 21:00:03,732 INFO L226 Difference]: Without dead ends: 100925 [2021-06-12 21:00:03,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:00:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-06-12 21:00:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-06-12 21:00:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-06-12 21:00:06,079 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-06-12 21:00:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:06,079 INFO L482 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-06-12 21:00:06,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-06-12 21:00:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:00:06,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:06,267 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:06,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 21:00:06,470 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-06-12 21:00:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:06,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692166068] [2021-06-12 21:00:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:00:06,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692166068] [2021-06-12 21:00:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692166068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731983278] [2021-06-12 21:00:06,543 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:00:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:00:06,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731983278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:06,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:06,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 21:00:06,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164934252] [2021-06-12 21:00:06,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:00:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:00:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:00:06,663 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:06,964 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-12 21:00:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:10,615 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-06-12 21:00:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:00:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 21:00:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:12,498 INFO L225 Difference]: With dead ends: 345279 [2021-06-12 21:00:12,499 INFO L226 Difference]: Without dead ends: 340111 [2021-06-12 21:00:12,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:00:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-06-12 21:00:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-06-12 21:00:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-06-12 21:00:23,045 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-06-12 21:00:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:23,045 INFO L482 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-06-12 21:00:23,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-06-12 21:00:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:00:24,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:24,372 INFO L472 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, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:24,588 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-06-12 21:00:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505104639] [2021-06-12 21:00:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:00:24,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505104639] [2021-06-12 21:00:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505104639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133443412] [2021-06-12 21:00:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:24,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:00:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:00:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:00:24,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133443412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:24,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:24,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 21:00:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833606438] [2021-06-12 21:00:24,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:00:24,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:00:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:00:24,840 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:27,636 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-06-12 21:00:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:00:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 36 [2021-06-12 21:00:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:28,982 INFO L225 Difference]: With dead ends: 231776 [2021-06-12 21:00:28,982 INFO L226 Difference]: Without dead ends: 229312 [2021-06-12 21:00:28,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:00:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-06-12 21:00:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-06-12 21:00:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-06-12 21:00:36,106 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-06-12 21:00:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:36,106 INFO L482 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-06-12 21:00:36,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-06-12 21:00:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 21:00:37,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:37,034 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-06-12 21:00:37,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:00:37,245 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash -54932290, now seen corresponding path program 15 times [2021-06-12 21:00:37,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:37,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64626378] [2021-06-12 21:00:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:00:37,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64626378] [2021-06-12 21:00:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64626378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410245838] [2021-06-12 21:00:37,303 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:37,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:00:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:00:37,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:00:37,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410245838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:37,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:37,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-12 21:00:37,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101844974] [2021-06-12 21:00:37,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:00:37,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:00:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:00:37,412 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:43,113 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-06-12 21:00:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:00:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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 38 [2021-06-12 21:00:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:47,833 INFO L225 Difference]: With dead ends: 502202 [2021-06-12 21:00:47,834 INFO L226 Difference]: Without dead ends: 498334 [2021-06-12 21:00:47,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:00:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-06-12 21:01:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-06-12 21:01:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-06-12 21:01:04,953 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-06-12 21:01:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:04,953 INFO L482 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-06-12 21:01:04,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-06-12 21:01:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 21:01:07,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:07,309 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2021-06-12 21:01:07,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 21:01:07,510 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2092943236, now seen corresponding path program 16 times [2021-06-12 21:01:07,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:07,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692096437] [2021-06-12 21:01:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:01:07,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692096437] [2021-06-12 21:01:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692096437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816429535] [2021-06-12 21:01:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:07,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:07,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:01:07,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:01:07,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816429535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:07,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:07,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 21:01:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576303773] [2021-06-12 21:01:07,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:01:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:01:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:01:07,771 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)