/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:36:23,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:36:23,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:36:23,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:36:23,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:36:23,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:36:23,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:36:23,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:36:23,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:36:23,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:36:23,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:36:23,212 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:36:23,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:36:23,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:36:23,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:36:23,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:36:23,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:36:23,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:36:23,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:36:23,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:36:23,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:36:23,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:36:23,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:36:23,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:36:23,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:36:23,555 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:36:23,557 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:36:23,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2021-03-10 21:36:23,558 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2021-03-10 21:36:23,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:36:23,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:36:23,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:36:23,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:36:23,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:36:23,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:36:23,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:36:23,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:36:23,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:36:23,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... [2021-03-10 21:36:23,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:36:23,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:36:23,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:36:23,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:36:23,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:36:23,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:36:23,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:36:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:36:23,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:36:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:36:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:36:23,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:36:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:36:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:36:23,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:36:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:36:23,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:36:23,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 21:36:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 21:36:23,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 21:36:23,707 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:36:23,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:36:23,822 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:36:23,822 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:36:23 BoogieIcfgContainer [2021-03-10 21:36:23,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:36:23,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:36:23,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:36:23,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:36:23,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:36:23" (1/2) ... [2021-03-10 21:36:23,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79095edf and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:36:23, skipping insertion in model container [2021-03-10 21:36:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:36:23" (2/2) ... [2021-03-10 21:36:23,830 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2021-03-10 21:36:23,834 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:36:23,834 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:36:23,837 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:36:23,838 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:36:23,876 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 21:36:23,908 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 21:36:23,928 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:36:23,928 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:36:23,928 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:36:23,928 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:36:23,928 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:36:23,929 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:36:23,929 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:36:23,929 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:36:23,937 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-03-10 21:36:24,044 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:36:24,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:24,078 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:24,078 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:24,088 INFO L82 PathProgramCache]: Analyzing trace with hash -775211453, now seen corresponding path program 1 times [2021-03-10 21:36:24,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:24,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070146211] [2021-03-10 21:36:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070146211] [2021-03-10 21:36:24,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:24,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:36:24,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958118207] [2021-03-10 21:36:24,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:36:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:36:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:36:24,342 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:24,441 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-03-10 21:36:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:36:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:36:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:24,470 INFO L225 Difference]: With dead ends: 854 [2021-03-10 21:36:24,470 INFO L226 Difference]: Without dead ends: 823 [2021-03-10 21:36:24,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:36:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-03-10 21:36:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-03-10 21:36:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-03-10 21:36:24,581 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-03-10 21:36:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:24,583 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-03-10 21:36:24,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-03-10 21:36:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:24,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:24,589 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:24,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:36:24,589 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash 718690595, now seen corresponding path program 1 times [2021-03-10 21:36:24,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:24,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950300635] [2021-03-10 21:36:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950300635] [2021-03-10 21:36:24,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770062678] [2021-03-10 21:36:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:36:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:24,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:24,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 21:36:24,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896528339] [2021-03-10 21:36:24,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:36:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:36:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:36:24,878 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-03-10 21:36:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:24,985 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-03-10 21:36:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:36:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 21 [2021-03-10 21:36:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:24,995 INFO L225 Difference]: With dead ends: 1354 [2021-03-10 21:36:24,995 INFO L226 Difference]: Without dead ends: 1354 [2021-03-10 21:36:24,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-03-10 21:36:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-03-10 21:36:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-03-10 21:36:25,035 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-03-10 21:36:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:25,036 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-03-10 21:36:25,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-03-10 21:36:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-03-10 21:36:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:25,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:25,041 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:25,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:36:25,263 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash -338545309, now seen corresponding path program 1 times [2021-03-10 21:36:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:25,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570931710] [2021-03-10 21:36:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570931710] [2021-03-10 21:36:25,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:25,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:25,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198087295] [2021-03-10 21:36:25,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:25,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:25,327 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:25,400 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-03-10 21:36:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:36:25,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:25,408 INFO L225 Difference]: With dead ends: 973 [2021-03-10 21:36:25,408 INFO L226 Difference]: Without dead ends: 953 [2021-03-10 21:36:25,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-03-10 21:36:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-03-10 21:36:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-03-10 21:36:25,446 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-03-10 21:36:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:25,446 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-03-10 21:36:25,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-03-10 21:36:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:25,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:25,450 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:25,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:36:25,451 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash -325565887, now seen corresponding path program 1 times [2021-03-10 21:36:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:25,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430481075] [2021-03-10 21:36:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:25,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430481075] [2021-03-10 21:36:25,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357089008] [2021-03-10 21:36:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:36:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:25,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:25,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:36:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366786634] [2021-03-10 21:36:25,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:25,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:25,664 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:25,725 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-03-10 21:36:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:25,738 INFO L225 Difference]: With dead ends: 1748 [2021-03-10 21:36:25,738 INFO L226 Difference]: Without dead ends: 1748 [2021-03-10 21:36:25,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-03-10 21:36:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-03-10 21:36:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-03-10 21:36:25,783 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-03-10 21:36:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:25,783 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-03-10 21:36:25,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-03-10 21:36:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:25,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:25,788 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:26,011 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,012 INFO L82 PathProgramCache]: Analyzing trace with hash -503729535, now seen corresponding path program 1 times [2021-03-10 21:36:26,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368105598] [2021-03-10 21:36:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368105598] [2021-03-10 21:36:26,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:26,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:26,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953244960] [2021-03-10 21:36:26,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:26,038 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,091 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-03-10 21:36:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:26,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,101 INFO L225 Difference]: With dead ends: 1477 [2021-03-10 21:36:26,101 INFO L226 Difference]: Without dead ends: 1453 [2021-03-10 21:36:26,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-03-10 21:36:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-03-10 21:36:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-03-10 21:36:26,133 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-03-10 21:36:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,134 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-03-10 21:36:26,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-03-10 21:36:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:26,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,137 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:36:26,137 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1245517247, now seen corresponding path program 2 times [2021-03-10 21:36:26,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787670415] [2021-03-10 21:36:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787670415] [2021-03-10 21:36:26,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:26,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655755881] [2021-03-10 21:36:26,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:26,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:26,158 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,206 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-03-10 21:36:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,215 INFO L225 Difference]: With dead ends: 1520 [2021-03-10 21:36:26,215 INFO L226 Difference]: Without dead ends: 1520 [2021-03-10 21:36:26,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-10 21:36:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-03-10 21:36:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-03-10 21:36:26,250 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-03-10 21:36:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,250 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-03-10 21:36:26,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-03-10 21:36:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:26,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,254 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:36:26,254 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1270599489, now seen corresponding path program 2 times [2021-03-10 21:36:26,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444787309] [2021-03-10 21:36:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444787309] [2021-03-10 21:36:26,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:26,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244117428] [2021-03-10 21:36:26,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:26,274 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,323 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-03-10 21:36:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,333 INFO L225 Difference]: With dead ends: 1519 [2021-03-10 21:36:26,333 INFO L226 Difference]: Without dead ends: 1478 [2021-03-10 21:36:26,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-03-10 21:36:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-03-10 21:36:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-03-10 21:36:26,376 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-03-10 21:36:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,376 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-03-10 21:36:26,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-03-10 21:36:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:36:26,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,380 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:36:26,380 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1863098109, now seen corresponding path program 2 times [2021-03-10 21:36:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999600996] [2021-03-10 21:36:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999600996] [2021-03-10 21:36:26,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:26,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:36:26,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564998795] [2021-03-10 21:36:26,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:36:26,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:36:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,410 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,464 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-03-10 21:36:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:36:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,475 INFO L225 Difference]: With dead ends: 1589 [2021-03-10 21:36:26,475 INFO L226 Difference]: Without dead ends: 1589 [2021-03-10 21:36:26,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-03-10 21:36:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-03-10 21:36:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-03-10 21:36:26,526 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-03-10 21:36:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,526 INFO L480 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-03-10 21:36:26,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-03-10 21:36:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:36:26,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,531 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:26,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:36:26,532 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash 782245955, now seen corresponding path program 1 times [2021-03-10 21:36:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863052280] [2021-03-10 21:36:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863052280] [2021-03-10 21:36:26,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117417787] [2021-03-10 21:36:26,580 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 [2021-03-10 21:36:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:26,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:26,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:26,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-03-10 21:36:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933667326] [2021-03-10 21:36:26,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:36:26,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:36:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,808 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:26,927 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-03-10 21:36:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:36:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:26,939 INFO L225 Difference]: With dead ends: 2143 [2021-03-10 21:36:26,939 INFO L226 Difference]: Without dead ends: 2075 [2021-03-10 21:36:26,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-03-10 21:36:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-03-10 21:36:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-03-10 21:36:26,985 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-03-10 21:36:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-03-10 21:36:26,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-03-10 21:36:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:36:26,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:26,991 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:27,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,207 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1114307901, now seen corresponding path program 2 times [2021-03-10 21:36:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:27,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118496546] [2021-03-10 21:36:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:27,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118496546] [2021-03-10 21:36:27,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:27,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:27,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552435130] [2021-03-10 21:36:27,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:27,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:27,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:27,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:27,245 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:27,315 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-03-10 21:36:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:36:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:36:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:27,325 INFO L225 Difference]: With dead ends: 2365 [2021-03-10 21:36:27,325 INFO L226 Difference]: Without dead ends: 2297 [2021-03-10 21:36:27,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-03-10 21:36:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-03-10 21:36:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-03-10 21:36:27,389 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-03-10 21:36:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:27,389 INFO L480 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-03-10 21:36:27,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-03-10 21:36:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:36:27,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:27,395 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:27,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:36:27,395 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2108929791, now seen corresponding path program 1 times [2021-03-10 21:36:27,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:27,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859234122] [2021-03-10 21:36:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859234122] [2021-03-10 21:36:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181290810] [2021-03-10 21:36:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:36:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:27,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:27,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-03-10 21:36:27,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540560611] [2021-03-10 21:36:27,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:36:27,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:27,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:36:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:27,546 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:27,658 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-03-10 21:36:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:36:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:27,668 INFO L225 Difference]: With dead ends: 2448 [2021-03-10 21:36:27,669 INFO L226 Difference]: Without dead ends: 2397 [2021-03-10 21:36:27,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-03-10 21:36:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-03-10 21:36:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-03-10 21:36:27,733 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-03-10 21:36:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:27,733 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-03-10 21:36:27,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-03-10 21:36:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:36:27,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:27,740 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:27,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:27,964 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:27,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2062855685, now seen corresponding path program 2 times [2021-03-10 21:36:27,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:27,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476077067] [2021-03-10 21:36:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:27,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476077067] [2021-03-10 21:36:27,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:36:28,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169663045] [2021-03-10 21:36:28,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:36:28,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:28,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:36:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:28,001 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:28,061 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-03-10 21:36:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:36:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:36:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:28,072 INFO L225 Difference]: With dead ends: 2710 [2021-03-10 21:36:28,072 INFO L226 Difference]: Without dead ends: 2659 [2021-03-10 21:36:28,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:36:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-03-10 21:36:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-03-10 21:36:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-03-10 21:36:28,199 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-03-10 21:36:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:28,199 INFO L480 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-03-10 21:36:28,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-03-10 21:36:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:28,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:28,208 INFO L519 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] [2021-03-10 21:36:28,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:36:28,208 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 446034501, now seen corresponding path program 3 times [2021-03-10 21:36:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:28,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56750984] [2021-03-10 21:36:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:28,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56750984] [2021-03-10 21:36:28,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481469879] [2021-03-10 21:36:28,255 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:28,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:28,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:28,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434244283] [2021-03-10 21:36:28,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:28,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:28,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:28,409 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-03-10 21:36:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:28,852 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-03-10 21:36:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 25 [2021-03-10 21:36:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:28,876 INFO L225 Difference]: With dead ends: 6038 [2021-03-10 21:36:28,876 INFO L226 Difference]: Without dead ends: 6038 [2021-03-10 21:36:28,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:36:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-03-10 21:36:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-03-10 21:36:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-03-10 21:36:28,998 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-03-10 21:36:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:28,998 INFO L480 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-03-10 21:36:28,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-03-10 21:36:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-03-10 21:36:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:29,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:29,006 INFO L519 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] [2021-03-10 21:36:29,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 21:36:29,219 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:29,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1187093435, now seen corresponding path program 4 times [2021-03-10 21:36:29,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:29,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390459353] [2021-03-10 21:36:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:29,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390459353] [2021-03-10 21:36:29,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229256031] [2021-03-10 21:36:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:36:29,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:29,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:29,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023018943] [2021-03-10 21:36:29,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:29,352 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-03-10 21:36:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:29,669 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-03-10 21:36:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 25 [2021-03-10 21:36:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:29,694 INFO L225 Difference]: With dead ends: 5607 [2021-03-10 21:36:29,694 INFO L226 Difference]: Without dead ends: 5495 [2021-03-10 21:36:29,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-03-10 21:36:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-03-10 21:36:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-03-10 21:36:29,851 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-03-10 21:36:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:29,851 INFO L480 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-03-10 21:36:29,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-03-10 21:36:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-03-10 21:36:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:29,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:29,863 INFO L519 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] [2021-03-10 21:36:30,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:30,087 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:30,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:30,087 INFO L82 PathProgramCache]: Analyzing trace with hash 204660801, now seen corresponding path program 5 times [2021-03-10 21:36:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:30,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130421222] [2021-03-10 21:36:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130421222] [2021-03-10 21:36:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10824052] [2021-03-10 21:36:30,119 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:30,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:36:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:30,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:30,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:30,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228971550] [2021-03-10 21:36:30,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:30,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:30,274 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:30,517 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-03-10 21:36:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:30,539 INFO L225 Difference]: With dead ends: 5302 [2021-03-10 21:36:30,539 INFO L226 Difference]: Without dead ends: 5302 [2021-03-10 21:36:30,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-03-10 21:36:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-03-10 21:36:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-03-10 21:36:30,667 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-03-10 21:36:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:30,668 INFO L480 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-03-10 21:36:30,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-03-10 21:36:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:30,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:30,679 INFO L519 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] [2021-03-10 21:36:30,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:36:30,902 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash 651271677, now seen corresponding path program 6 times [2021-03-10 21:36:30,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:30,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910076384] [2021-03-10 21:36:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:30,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910076384] [2021-03-10 21:36:30,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887481973] [2021-03-10 21:36:30,936 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 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 [2021-03-10 21:36:30,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:36:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:30,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:31,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:31,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:31,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564639189] [2021-03-10 21:36:31,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:31,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:31,054 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:31,283 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-03-10 21:36:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:31,301 INFO L225 Difference]: With dead ends: 4788 [2021-03-10 21:36:31,301 INFO L226 Difference]: Without dead ends: 4768 [2021-03-10 21:36:31,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-03-10 21:36:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-03-10 21:36:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-03-10 21:36:31,420 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-03-10 21:36:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:31,420 INFO L480 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-03-10 21:36:31,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-03-10 21:36:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:31,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:31,430 INFO L519 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] [2021-03-10 21:36:31,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:36:31,653 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:31,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1201615291, now seen corresponding path program 7 times [2021-03-10 21:36:31,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:31,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229306473] [2021-03-10 21:36:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:31,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229306473] [2021-03-10 21:36:31,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801693489] [2021-03-10 21:36:31,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:31,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:31,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:31,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454456035] [2021-03-10 21:36:31,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:31,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:31,808 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:32,004 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-03-10 21:36:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:32,031 INFO L225 Difference]: With dead ends: 7954 [2021-03-10 21:36:32,031 INFO L226 Difference]: Without dead ends: 7954 [2021-03-10 21:36:32,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-03-10 21:36:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-03-10 21:36:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-03-10 21:36:32,183 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-03-10 21:36:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:32,183 INFO L480 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-03-10 21:36:32,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-03-10 21:36:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:32,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:32,232 INFO L519 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] [2021-03-10 21:36:32,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:36:32,433 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1585751749, now seen corresponding path program 8 times [2021-03-10 21:36:32,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:32,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812837158] [2021-03-10 21:36:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:32,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812837158] [2021-03-10 21:36:32,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948833994] [2021-03-10 21:36:32,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:32,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:32,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:32,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:32,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388583415] [2021-03-10 21:36:32,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:32,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:32,562 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:32,773 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-03-10 21:36:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:32,787 INFO L225 Difference]: With dead ends: 6087 [2021-03-10 21:36:32,787 INFO L226 Difference]: Without dead ends: 6059 [2021-03-10 21:36:32,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-03-10 21:36:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-03-10 21:36:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-03-10 21:36:32,934 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-03-10 21:36:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:32,934 INFO L480 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-03-10 21:36:32,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-03-10 21:36:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:32,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:32,948 INFO L519 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] [2021-03-10 21:36:33,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:36:33,171 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash 526799169, now seen corresponding path program 9 times [2021-03-10 21:36:33,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:33,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906161072] [2021-03-10 21:36:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:33,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906161072] [2021-03-10 21:36:33,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209359017] [2021-03-10 21:36:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:33,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:33,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:33,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535793749] [2021-03-10 21:36:33,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:33,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:33,319 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:33,581 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-03-10 21:36:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:33,636 INFO L225 Difference]: With dead ends: 6950 [2021-03-10 21:36:33,636 INFO L226 Difference]: Without dead ends: 6950 [2021-03-10 21:36:33,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-03-10 21:36:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-03-10 21:36:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-03-10 21:36:33,803 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-03-10 21:36:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:33,803 INFO L480 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-03-10 21:36:33,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-03-10 21:36:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:33,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:33,817 INFO L519 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] [2021-03-10 21:36:34,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:34,031 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash 973410045, now seen corresponding path program 10 times [2021-03-10 21:36:34,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:34,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929032359] [2021-03-10 21:36:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:34,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929032359] [2021-03-10 21:36:34,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761476132] [2021-03-10 21:36:34,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:34,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:34,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:34,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:34,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:34,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149407975] [2021-03-10 21:36:34,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:34,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:34,167 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:34,368 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-03-10 21:36:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:36:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:34,389 INFO L225 Difference]: With dead ends: 7627 [2021-03-10 21:36:34,389 INFO L226 Difference]: Without dead ends: 7607 [2021-03-10 21:36:34,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-03-10 21:36:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-03-10 21:36:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-03-10 21:36:34,518 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-03-10 21:36:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:34,520 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-03-10 21:36:34,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-03-10 21:36:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:34,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:34,530 INFO L519 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] [2021-03-10 21:36:34,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:34,743 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash 258052741, now seen corresponding path program 11 times [2021-03-10 21:36:34,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:34,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172045813] [2021-03-10 21:36:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172045813] [2021-03-10 21:36:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409497374] [2021-03-10 21:36:34,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:34,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:36:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:34,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:34,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:34,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123598209] [2021-03-10 21:36:34,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:34,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:34,854 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) 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) [2021-03-10 21:36:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:35,257 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-03-10 21:36:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:36:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) 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 25 [2021-03-10 21:36:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:35,275 INFO L225 Difference]: With dead ends: 7378 [2021-03-10 21:36:35,275 INFO L226 Difference]: Without dead ends: 7378 [2021-03-10 21:36:35,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:36:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-03-10 21:36:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-03-10 21:36:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-03-10 21:36:35,420 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-03-10 21:36:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:35,420 INFO L480 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-03-10 21:36:35,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) 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) [2021-03-10 21:36:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-03-10 21:36:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:35,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:35,434 INFO L519 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] [2021-03-10 21:36:35,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:36:35,647 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1577193245, now seen corresponding path program 12 times [2021-03-10 21:36:35,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:35,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692719987] [2021-03-10 21:36:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:35,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692719987] [2021-03-10 21:36:35,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446740620] [2021-03-10 21:36:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:35,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:36:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:35,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:35,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:36:35,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5834481] [2021-03-10 21:36:35,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:35,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:35,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:35,798 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) 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) [2021-03-10 21:36:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:36,047 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-03-10 21:36:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:36,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) 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 25 [2021-03-10 21:36:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:36,067 INFO L225 Difference]: With dead ends: 7943 [2021-03-10 21:36:36,068 INFO L226 Difference]: Without dead ends: 7883 [2021-03-10 21:36:36,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-03-10 21:36:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-03-10 21:36:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-03-10 21:36:36,206 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-03-10 21:36:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:36,207 INFO L480 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-03-10 21:36:36,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) 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) [2021-03-10 21:36:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-03-10 21:36:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:36,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:36,220 INFO L519 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] [2021-03-10 21:36:36,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:36,435 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 318673917, now seen corresponding path program 3 times [2021-03-10 21:36:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:36,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854915362] [2021-03-10 21:36:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854915362] [2021-03-10 21:36:36,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479071057] [2021-03-10 21:36:36,462 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 [2021-03-10 21:36:36,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:36,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:36,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:36:36,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400521193] [2021-03-10 21:36:36,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:36,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:36,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:36,568 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-03-10 21:36:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:36,992 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-03-10 21:36:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:36:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 25 [2021-03-10 21:36:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:37,034 INFO L225 Difference]: With dead ends: 15644 [2021-03-10 21:36:37,034 INFO L226 Difference]: Without dead ends: 15644 [2021-03-10 21:36:37,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-03-10 21:36:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-03-10 21:36:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-03-10 21:36:37,259 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-03-10 21:36:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:37,259 INFO L480 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-03-10 21:36:37,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-03-10 21:36:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-03-10 21:36:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:37,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:37,275 INFO L519 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] [2021-03-10 21:36:37,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:36:37,476 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash 902100029, now seen corresponding path program 4 times [2021-03-10 21:36:37,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:37,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168664042] [2021-03-10 21:36:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168664042] [2021-03-10 21:36:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072348127] [2021-03-10 21:36:37,499 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 [2021-03-10 21:36:37,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:37,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:37,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:37,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:37,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:36:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660886765] [2021-03-10 21:36:37,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:37,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:37,590 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:37,844 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-03-10 21:36:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:37,982 INFO L225 Difference]: With dead ends: 14414 [2021-03-10 21:36:37,982 INFO L226 Difference]: Without dead ends: 14318 [2021-03-10 21:36:37,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-03-10 21:36:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-03-10 21:36:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-03-10 21:36:38,353 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-03-10 21:36:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:38,353 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-03-10 21:36:38,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-03-10 21:36:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:38,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:38,374 INFO L519 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] [2021-03-10 21:36:38,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:38,575 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2062849021, now seen corresponding path program 5 times [2021-03-10 21:36:38,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:38,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390808606] [2021-03-10 21:36:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:38,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390808606] [2021-03-10 21:36:38,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81183967] [2021-03-10 21:36:38,708 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 [2021-03-10 21:36:38,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:36:38,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:38,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:38,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:38,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991482378] [2021-03-10 21:36:38,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:38,798 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:39,072 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-03-10 21:36:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:36:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:39,150 INFO L225 Difference]: With dead ends: 14334 [2021-03-10 21:36:39,151 INFO L226 Difference]: Without dead ends: 14334 [2021-03-10 21:36:39,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-03-10 21:36:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-03-10 21:36:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-03-10 21:36:39,523 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-03-10 21:36:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:39,523 INFO L480 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-03-10 21:36:39,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-03-10 21:36:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:39,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:39,542 INFO L519 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] [2021-03-10 21:36:39,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:36:39,743 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash 283998461, now seen corresponding path program 6 times [2021-03-10 21:36:39,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:39,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166316746] [2021-03-10 21:36:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:39,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166316746] [2021-03-10 21:36:39,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354605232] [2021-03-10 21:36:39,761 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 [2021-03-10 21:36:39,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:36:39,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:39,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:39,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:39,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:39,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245727450] [2021-03-10 21:36:39,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:39,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:39,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:39,894 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:40,107 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-03-10 21:36:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:40,145 INFO L225 Difference]: With dead ends: 12691 [2021-03-10 21:36:40,145 INFO L226 Difference]: Without dead ends: 12666 [2021-03-10 21:36:40,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-03-10 21:36:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-03-10 21:36:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-03-10 21:36:40,557 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-03-10 21:36:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:40,557 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-03-10 21:36:40,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-03-10 21:36:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:40,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:40,578 INFO L519 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] [2021-03-10 21:36:40,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:36:40,778 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1244801347, now seen corresponding path program 7 times [2021-03-10 21:36:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:40,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801044641] [2021-03-10 21:36:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801044641] [2021-03-10 21:36:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127478550] [2021-03-10 21:36:40,807 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 [2021-03-10 21:36:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:40,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:40,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998141497] [2021-03-10 21:36:40,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:40,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:40,887 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-03-10 21:36:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:41,124 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-03-10 21:36:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 25 [2021-03-10 21:36:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:41,164 INFO L225 Difference]: With dead ends: 16572 [2021-03-10 21:36:41,164 INFO L226 Difference]: Without dead ends: 16572 [2021-03-10 21:36:41,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-03-10 21:36:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-03-10 21:36:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-03-10 21:36:41,473 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-03-10 21:36:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:41,473 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-03-10 21:36:41,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-03-10 21:36:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-03-10 21:36:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:41,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:41,494 INFO L519 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] [2021-03-10 21:36:41,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:36:41,707 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:41,707 INFO L82 PathProgramCache]: Analyzing trace with hash -425442877, now seen corresponding path program 8 times [2021-03-10 21:36:41,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:41,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915743415] [2021-03-10 21:36:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915743415] [2021-03-10 21:36:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649675999] [2021-03-10 21:36:41,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:41,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816174547] [2021-03-10 21:36:41,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:41,920 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:42,161 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-03-10 21:36:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:42,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:42,202 INFO L225 Difference]: With dead ends: 13953 [2021-03-10 21:36:42,202 INFO L226 Difference]: Without dead ends: 13929 [2021-03-10 21:36:42,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:36:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-03-10 21:36:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-03-10 21:36:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-03-10 21:36:42,544 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-03-10 21:36:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:42,544 INFO L480 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-03-10 21:36:42,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-03-10 21:36:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:42,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:42,567 INFO L519 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] [2021-03-10 21:36:42,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 21:36:42,791 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash 628726211, now seen corresponding path program 9 times [2021-03-10 21:36:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:42,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247504273] [2021-03-10 21:36:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:42,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247504273] [2021-03-10 21:36:42,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964604520] [2021-03-10 21:36:42,810 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 [2021-03-10 21:36:42,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:42,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:42,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795963317] [2021-03-10 21:36:42,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:42,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:42,911 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:43,177 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-03-10 21:36:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:36:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:43,214 INFO L225 Difference]: With dead ends: 16966 [2021-03-10 21:36:43,214 INFO L226 Difference]: Without dead ends: 16966 [2021-03-10 21:36:43,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:36:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-03-10 21:36:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-03-10 21:36:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-03-10 21:36:43,557 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-03-10 21:36:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:43,558 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-03-10 21:36:43,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-03-10 21:36:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:43,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:43,577 INFO L519 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] [2021-03-10 21:36:43,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:36:43,777 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1150124349, now seen corresponding path program 10 times [2021-03-10 21:36:43,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:43,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670334777] [2021-03-10 21:36:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:43,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670334777] [2021-03-10 21:36:43,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277756418] [2021-03-10 21:36:43,800 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 [2021-03-10 21:36:43,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:43,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:43,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 21:36:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625789499] [2021-03-10 21:36:43,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:43,891 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:44,294 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-03-10 21:36:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:36:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:44,336 INFO L225 Difference]: With dead ends: 15336 [2021-03-10 21:36:44,336 INFO L226 Difference]: Without dead ends: 15311 [2021-03-10 21:36:44,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:36:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-03-10 21:36:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-03-10 21:36:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-03-10 21:36:44,564 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-03-10 21:36:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:44,564 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-03-10 21:36:44,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-03-10 21:36:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:44,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:44,583 INFO L519 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] [2021-03-10 21:36:44,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:44,784 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash -230759545, now seen corresponding path program 11 times [2021-03-10 21:36:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885396532] [2021-03-10 21:36:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:44,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885396532] [2021-03-10 21:36:44,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500188001] [2021-03-10 21:36:44,824 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:44,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:36:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:45,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:45,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:36:45,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468910410] [2021-03-10 21:36:45,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:45,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:45,004 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:45,443 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-03-10 21:36:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:36:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:45,493 INFO L225 Difference]: With dead ends: 16139 [2021-03-10 21:36:45,493 INFO L226 Difference]: Without dead ends: 16139 [2021-03-10 21:36:45,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:36:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-03-10 21:36:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-03-10 21:36:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-03-10 21:36:45,764 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-03-10 21:36:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:45,764 INFO L480 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-03-10 21:36:45,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-03-10 21:36:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:45,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:45,783 INFO L519 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] [2021-03-10 21:36:45,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 21:36:45,991 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2077275809, now seen corresponding path program 12 times [2021-03-10 21:36:45,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:45,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100159406] [2021-03-10 21:36:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100159406] [2021-03-10 21:36:46,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125765694] [2021-03-10 21:36:46,024 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:46,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:36:46,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:36:46,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:46,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:36:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326228062] [2021-03-10 21:36:46,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:46,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:46,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:46,119 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:46,431 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-03-10 21:36:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:36:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:46,469 INFO L225 Difference]: With dead ends: 15510 [2021-03-10 21:36:46,469 INFO L226 Difference]: Without dead ends: 15419 [2021-03-10 21:36:46,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-03-10 21:36:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-03-10 21:36:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-03-10 21:36:46,704 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-03-10 21:36:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:46,704 INFO L480 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-03-10 21:36:46,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-03-10 21:36:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:46,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:46,726 INFO L519 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] [2021-03-10 21:36:46,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:46,936 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2131213767, now seen corresponding path program 13 times [2021-03-10 21:36:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:46,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392874814] [2021-03-10 21:36:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392874814] [2021-03-10 21:36:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244991151] [2021-03-10 21:36:46,976 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:47,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:47,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:36:47,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626896257] [2021-03-10 21:36:47,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:47,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:47,162 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:47,411 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-03-10 21:36:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:36:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:47,450 INFO L225 Difference]: With dead ends: 12725 [2021-03-10 21:36:47,450 INFO L226 Difference]: Without dead ends: 12657 [2021-03-10 21:36:47,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-03-10 21:36:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-03-10 21:36:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-03-10 21:36:47,747 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-03-10 21:36:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:47,747 INFO L480 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-03-10 21:36:47,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-03-10 21:36:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:47,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:47,767 INFO L519 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] [2021-03-10 21:36:47,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:36:47,968 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2098443779, now seen corresponding path program 14 times [2021-03-10 21:36:47,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:47,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951863807] [2021-03-10 21:36:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:48,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951863807] [2021-03-10 21:36:48,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972794082] [2021-03-10 21:36:48,023 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:48,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:48,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:48,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-03-10 21:36:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230746860] [2021-03-10 21:36:48,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:48,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:48,198 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:48,549 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-03-10 21:36:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:48,601 INFO L225 Difference]: With dead ends: 13435 [2021-03-10 21:36:48,602 INFO L226 Difference]: Without dead ends: 13299 [2021-03-10 21:36:48,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-03-10 21:36:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-03-10 21:36:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-03-10 21:36:49,057 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-03-10 21:36:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:49,057 INFO L480 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-03-10 21:36:49,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-03-10 21:36:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:49,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:49,090 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:49,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:36:49,303 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1331348033, now seen corresponding path program 1 times [2021-03-10 21:36:49,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:49,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362412282] [2021-03-10 21:36:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:49,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362412282] [2021-03-10 21:36:49,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791144288] [2021-03-10 21:36:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:49,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:49,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-03-10 21:36:49,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904359395] [2021-03-10 21:36:49,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:49,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:49,537 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:49,853 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-03-10 21:36:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:49,888 INFO L225 Difference]: With dead ends: 12852 [2021-03-10 21:36:49,888 INFO L226 Difference]: Without dead ends: 12484 [2021-03-10 21:36:49,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-03-10 21:36:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-03-10 21:36:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-03-10 21:36:50,235 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-03-10 21:36:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:50,235 INFO L480 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-03-10 21:36:50,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-03-10 21:36:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:50,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:50,259 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:50,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:36:50,463 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1021063837, now seen corresponding path program 2 times [2021-03-10 21:36:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:50,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650220612] [2021-03-10 21:36:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:50,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650220612] [2021-03-10 21:36:50,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497562351] [2021-03-10 21:36:50,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:36:50,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:50,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:50,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:50,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-03-10 21:36:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81773842] [2021-03-10 21:36:50,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:50,737 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:51,048 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-03-10 21:36:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:51,087 INFO L225 Difference]: With dead ends: 12962 [2021-03-10 21:36:51,087 INFO L226 Difference]: Without dead ends: 12648 [2021-03-10 21:36:51,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-03-10 21:36:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-03-10 21:36:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-03-10 21:36:51,520 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-03-10 21:36:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:51,521 INFO L480 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-03-10 21:36:51,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-03-10 21:36:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:51,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:51,551 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:51,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:36:51,767 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1930816945, now seen corresponding path program 3 times [2021-03-10 21:36:51,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:51,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117190530] [2021-03-10 21:36:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:51,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117190530] [2021-03-10 21:36:51,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231961789] [2021-03-10 21:36:51,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:51,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:51,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:36:51,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973068548] [2021-03-10 21:36:51,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:51,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:51,965 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:52,233 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-03-10 21:36:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:36:52,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:52,266 INFO L225 Difference]: With dead ends: 12764 [2021-03-10 21:36:52,266 INFO L226 Difference]: Without dead ends: 12616 [2021-03-10 21:36:52,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-03-10 21:36:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-03-10 21:36:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-03-10 21:36:52,494 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-03-10 21:36:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:52,494 INFO L480 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-03-10 21:36:52,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-03-10 21:36:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:52,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:52,520 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:52,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:36:52,720 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1924196293, now seen corresponding path program 4 times [2021-03-10 21:36:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:52,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58863840] [2021-03-10 21:36:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:52,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58863840] [2021-03-10 21:36:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259458410] [2021-03-10 21:36:52,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:52,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:52,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:52,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-03-10 21:36:52,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548714543] [2021-03-10 21:36:52,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:52,935 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:53,374 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-03-10 21:36:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:53,408 INFO L225 Difference]: With dead ends: 13344 [2021-03-10 21:36:53,408 INFO L226 Difference]: Without dead ends: 12916 [2021-03-10 21:36:53,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-03-10 21:36:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-03-10 21:36:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-03-10 21:36:53,644 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-03-10 21:36:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:53,645 INFO L480 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-03-10 21:36:53,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-03-10 21:36:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:53,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:53,667 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:53,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:53,867 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2042248701, now seen corresponding path program 5 times [2021-03-10 21:36:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71800584] [2021-03-10 21:36:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:53,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71800584] [2021-03-10 21:36:53,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501138102] [2021-03-10 21:36:53,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:53,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:36:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:53,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:54,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:54,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:36:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546833745] [2021-03-10 21:36:54,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:54,068 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:54,298 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-03-10 21:36:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:36:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:54,333 INFO L225 Difference]: With dead ends: 12692 [2021-03-10 21:36:54,333 INFO L226 Difference]: Without dead ends: 12544 [2021-03-10 21:36:54,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-03-10 21:36:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-03-10 21:36:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-03-10 21:36:54,667 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-03-10 21:36:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:54,667 INFO L480 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-03-10 21:36:54,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-03-10 21:36:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:54,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:54,691 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:54,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:36:54,892 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1678002305, now seen corresponding path program 6 times [2021-03-10 21:36:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:54,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811602540] [2021-03-10 21:36:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811602540] [2021-03-10 21:36:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324358271] [2021-03-10 21:36:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:54,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:36:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:55,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:55,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-03-10 21:36:55,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449439130] [2021-03-10 21:36:55,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:55,094 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:55,466 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-03-10 21:36:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:55,514 INFO L225 Difference]: With dead ends: 13227 [2021-03-10 21:36:55,514 INFO L226 Difference]: Without dead ends: 12883 [2021-03-10 21:36:55,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-03-10 21:36:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-03-10 21:36:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-03-10 21:36:55,898 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-03-10 21:36:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:55,900 INFO L480 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-03-10 21:36:55,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-03-10 21:36:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:55,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:55,926 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:56,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:36:56,127 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1177327465, now seen corresponding path program 7 times [2021-03-10 21:36:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:56,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15009825] [2021-03-10 21:36:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:36:56,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15009825] [2021-03-10 21:36:56,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:36:56,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:36:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771806965] [2021-03-10 21:36:56,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:36:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:36:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:56,176 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:56,323 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-03-10 21:36:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:36:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:56,363 INFO L225 Difference]: With dead ends: 12977 [2021-03-10 21:36:56,363 INFO L226 Difference]: Without dead ends: 12779 [2021-03-10 21:36:56,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:36:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-03-10 21:36:56,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-03-10 21:36:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-03-10 21:36:56,641 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-03-10 21:36:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:56,641 INFO L480 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-03-10 21:36:56,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-03-10 21:36:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:56,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:56,667 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:56,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-03-10 21:36:56,667 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:56,668 INFO L82 PathProgramCache]: Analyzing trace with hash 89085491, now seen corresponding path program 8 times [2021-03-10 21:36:56,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:56,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169536875] [2021-03-10 21:36:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169536875] [2021-03-10 21:36:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820315595] [2021-03-10 21:36:56,713 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:56,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:36:56,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:56,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:56,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:56,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:36:56,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462877887] [2021-03-10 21:36:56,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:56,846 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:57,344 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-03-10 21:36:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:36:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:57,392 INFO L225 Difference]: With dead ends: 12839 [2021-03-10 21:36:57,392 INFO L226 Difference]: Without dead ends: 12707 [2021-03-10 21:36:57,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-03-10 21:36:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-03-10 21:36:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-03-10 21:36:57,620 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-03-10 21:36:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:57,620 INFO L480 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-03-10 21:36:57,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-03-10 21:36:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:57,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:57,646 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:57,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:57,847 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:57,847 INFO L82 PathProgramCache]: Analyzing trace with hash -576277937, now seen corresponding path program 9 times [2021-03-10 21:36:57,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:57,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556569043] [2021-03-10 21:36:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556569043] [2021-03-10 21:36:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741309117] [2021-03-10 21:36:57,897 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:58,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-03-10 21:36:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567419514] [2021-03-10 21:36:58,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:36:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:36:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:58,034 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:58,390 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-03-10 21:36:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:36:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:58,428 INFO L225 Difference]: With dead ends: 13523 [2021-03-10 21:36:58,428 INFO L226 Difference]: Without dead ends: 13127 [2021-03-10 21:36:58,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:36:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-03-10 21:36:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-03-10 21:36:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-03-10 21:36:58,782 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-03-10 21:36:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:58,782 INFO L480 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-03-10 21:36:58,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-03-10 21:36:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:58,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:58,804 INFO L519 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] [2021-03-10 21:36:59,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 21:36:59,004 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:59,005 INFO L82 PathProgramCache]: Analyzing trace with hash 438743171, now seen corresponding path program 15 times [2021-03-10 21:36:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:59,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494093811] [2021-03-10 21:36:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:36:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494093811] [2021-03-10 21:36:59,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92349203] [2021-03-10 21:36:59,055 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:59,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:36:59,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:59,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:59,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:36:59,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595591429] [2021-03-10 21:36:59,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:36:59,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:59,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:36:59,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:59,179 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:59,416 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-03-10 21:36:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:36:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:36:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:59,451 INFO L225 Difference]: With dead ends: 13671 [2021-03-10 21:36:59,451 INFO L226 Difference]: Without dead ends: 13603 [2021-03-10 21:36:59,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:36:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-03-10 21:36:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-03-10 21:36:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-03-10 21:36:59,684 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-03-10 21:36:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:59,684 INFO L480 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-03-10 21:36:59,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-03-10 21:36:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:36:59,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:59,706 INFO L519 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] [2021-03-10 21:36:59,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:59,907 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1546876485, now seen corresponding path program 13 times [2021-03-10 21:36:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:59,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825260128] [2021-03-10 21:36:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:59,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825260128] [2021-03-10 21:36:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754908332] [2021-03-10 21:36:59,948 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:36:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:00,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:00,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:37:00,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169529826] [2021-03-10 21:37:00,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:37:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:37:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:37:00,212 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:00,415 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-03-10 21:37:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:37:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:37:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:00,451 INFO L225 Difference]: With dead ends: 13876 [2021-03-10 21:37:00,451 INFO L226 Difference]: Without dead ends: 13825 [2021-03-10 21:37:00,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:37:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-03-10 21:37:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-03-10 21:37:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-03-10 21:37:00,710 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-03-10 21:37:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:00,710 INFO L480 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-03-10 21:37:00,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-03-10 21:37:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:37:00,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:00,739 INFO L519 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] [2021-03-10 21:37:00,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:37:00,940 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1615231237, now seen corresponding path program 14 times [2021-03-10 21:37:00,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:00,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100269871] [2021-03-10 21:37:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:37:00,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100269871] [2021-03-10 21:37:00,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636127356] [2021-03-10 21:37:00,982 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:01,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:01,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:37:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:01,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:01,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-03-10 21:37:01,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694488698] [2021-03-10 21:37:01,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:37:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:37:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:37:01,136 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:01,718 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-03-10 21:37:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:37:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:37:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:01,772 INFO L225 Difference]: With dead ends: 14694 [2021-03-10 21:37:01,772 INFO L226 Difference]: Without dead ends: 14592 [2021-03-10 21:37:01,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:37:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-03-10 21:37:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-03-10 21:37:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-03-10 21:37:02,073 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-03-10 21:37:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:02,073 INFO L480 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-03-10 21:37:02,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-03-10 21:37:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:37:02,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:02,105 INFO L519 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] [2021-03-10 21:37:02,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:37:02,308 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 398788165, now seen corresponding path program 15 times [2021-03-10 21:37:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581048998] [2021-03-10 21:37:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:37:02,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581048998] [2021-03-10 21:37:02,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223855931] [2021-03-10 21:37:02,355 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:02,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:37:02,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:37:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:02,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:02,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-03-10 21:37:02,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10367918] [2021-03-10 21:37:02,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:37:02,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:37:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:37:02,534 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:02,818 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-03-10 21:37:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:37:02,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:37:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:02,866 INFO L225 Difference]: With dead ends: 14707 [2021-03-10 21:37:02,866 INFO L226 Difference]: Without dead ends: 14656 [2021-03-10 21:37:02,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:37:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-03-10 21:37:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-03-10 21:37:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-03-10 21:37:03,297 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-03-10 21:37:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:03,297 INFO L480 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-03-10 21:37:03,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-03-10 21:37:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:03,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:03,322 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:03,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 21:37:03,523 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash -136266039, now seen corresponding path program 16 times [2021-03-10 21:37:03,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:03,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093548928] [2021-03-10 21:37:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093548928] [2021-03-10 21:37:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571609236] [2021-03-10 21:37:03,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:03,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:03,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:03,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:03,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:37:03,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584179204] [2021-03-10 21:37:03,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:03,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:03,670 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:04,956 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-03-10 21:37:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:37:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:05,077 INFO L225 Difference]: With dead ends: 35846 [2021-03-10 21:37:05,077 INFO L226 Difference]: Without dead ends: 35846 [2021-03-10 21:37:05,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:37:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-03-10 21:37:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-03-10 21:37:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-03-10 21:37:05,458 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-03-10 21:37:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:05,458 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-03-10 21:37:05,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-03-10 21:37:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:05,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:05,484 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:05,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:37:05,684 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1909149495, now seen corresponding path program 17 times [2021-03-10 21:37:05,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:05,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802393357] [2021-03-10 21:37:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802393357] [2021-03-10 21:37:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805143869] [2021-03-10 21:37:05,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:37:05,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:37:05,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:05,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:05,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:37:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422530336] [2021-03-10 21:37:05,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:05,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:05,881 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:06,633 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-03-10 21:37:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:37:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:06,712 INFO L225 Difference]: With dead ends: 29402 [2021-03-10 21:37:06,712 INFO L226 Difference]: Without dead ends: 29122 [2021-03-10 21:37:06,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:37:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-03-10 21:37:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-03-10 21:37:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-03-10 21:37:07,125 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-03-10 21:37:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:07,125 INFO L480 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-03-10 21:37:07,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-03-10 21:37:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:07,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:07,158 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:07,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:07,359 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash -387959611, now seen corresponding path program 18 times [2021-03-10 21:37:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749737500] [2021-03-10 21:37:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749737500] [2021-03-10 21:37:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517184621] [2021-03-10 21:37:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:07,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:37:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:07,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:07,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:07,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336109474] [2021-03-10 21:37:07,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:07,502 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:08,143 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-03-10 21:37:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:37:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:08,232 INFO L225 Difference]: With dead ends: 29479 [2021-03-10 21:37:08,232 INFO L226 Difference]: Without dead ends: 29479 [2021-03-10 21:37:08,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-03-10 21:37:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-03-10 21:37:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-03-10 21:37:08,726 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-03-10 21:37:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:08,726 INFO L480 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-03-10 21:37:08,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-03-10 21:37:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:08,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:08,754 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:08,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:37:08,954 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash 58651265, now seen corresponding path program 19 times [2021-03-10 21:37:08,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:08,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534998826] [2021-03-10 21:37:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534998826] [2021-03-10 21:37:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274825822] [2021-03-10 21:37:08,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:37:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:09,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:09,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:09,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188554181] [2021-03-10 21:37:09,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:09,240 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:09,693 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-03-10 21:37:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:37:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:09,748 INFO L225 Difference]: With dead ends: 21742 [2021-03-10 21:37:09,748 INFO L226 Difference]: Without dead ends: 21722 [2021-03-10 21:37:09,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:37:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-03-10 21:37:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-03-10 21:37:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-03-10 21:37:10,128 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-03-10 21:37:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:10,128 INFO L480 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-03-10 21:37:10,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-03-10 21:37:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:10,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:10,162 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:10,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:10,363 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1828736635, now seen corresponding path program 20 times [2021-03-10 21:37:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:10,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485266040] [2021-03-10 21:37:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:10,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485266040] [2021-03-10 21:37:10,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480155082] [2021-03-10 21:37:10,396 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:10,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:10,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:10,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333879716] [2021-03-10 21:37:10,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:10,543 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:11,255 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-03-10 21:37:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:37:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:11,432 INFO L225 Difference]: With dead ends: 55537 [2021-03-10 21:37:11,432 INFO L226 Difference]: Without dead ends: 55537 [2021-03-10 21:37:11,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:37:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-03-10 21:37:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-03-10 21:37:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-03-10 21:37:12,330 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-03-10 21:37:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:12,330 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-03-10 21:37:12,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-03-10 21:37:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:12,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:12,368 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:12,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:12,568 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash 958630405, now seen corresponding path program 21 times [2021-03-10 21:37:12,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:12,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777653937] [2021-03-10 21:37:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:12,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777653937] [2021-03-10 21:37:12,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861722622] [2021-03-10 21:37:12,598 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:12,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:37:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:12,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:12,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:12,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423288414] [2021-03-10 21:37:12,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:12,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:12,743 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:13,783 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-03-10 21:37:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:37:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:13,896 INFO L225 Difference]: With dead ends: 35555 [2021-03-10 21:37:13,896 INFO L226 Difference]: Without dead ends: 35499 [2021-03-10 21:37:13,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:37:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-03-10 21:37:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-03-10 21:37:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-03-10 21:37:14,427 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-03-10 21:37:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:14,428 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-03-10 21:37:14,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-03-10 21:37:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:14,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:14,467 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:14,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 21:37:14,668 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:14,668 INFO L82 PathProgramCache]: Analyzing trace with hash -100322175, now seen corresponding path program 22 times [2021-03-10 21:37:14,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:14,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366226206] [2021-03-10 21:37:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:14,908 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-03-10 21:37:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:14,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366226206] [2021-03-10 21:37:14,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699826333] [2021-03-10 21:37:14,930 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:14,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:15,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:15,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956119160] [2021-03-10 21:37:15,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:15,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:15,051 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:15,764 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-03-10 21:37:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:37:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:15,872 INFO L225 Difference]: With dead ends: 42043 [2021-03-10 21:37:15,873 INFO L226 Difference]: Without dead ends: 42043 [2021-03-10 21:37:15,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-03-10 21:37:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-03-10 21:37:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-03-10 21:37:16,681 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-03-10 21:37:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:16,682 INFO L480 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-03-10 21:37:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-03-10 21:37:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:16,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:16,731 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:16,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:16,932 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash 346288701, now seen corresponding path program 23 times [2021-03-10 21:37:16,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:16,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066250831] [2021-03-10 21:37:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:16,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066250831] [2021-03-10 21:37:16,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620769411] [2021-03-10 21:37:16,966 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:17,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:37:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:17,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:17,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:17,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673108811] [2021-03-10 21:37:17,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:17,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:17,125 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:17,741 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-03-10 21:37:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:37:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:18,154 INFO L225 Difference]: With dead ends: 42315 [2021-03-10 21:37:18,154 INFO L226 Difference]: Without dead ends: 42275 [2021-03-10 21:37:18,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:37:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-03-10 21:37:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-03-10 21:37:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-03-10 21:37:18,661 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-03-10 21:37:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:18,661 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-03-10 21:37:18,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-03-10 21:37:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:18,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:18,699 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:18,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 21:37:18,900 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -369068603, now seen corresponding path program 24 times [2021-03-10 21:37:18,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:18,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696823241] [2021-03-10 21:37:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:18,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696823241] [2021-03-10 21:37:18,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013367455] [2021-03-10 21:37:18,930 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:18,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:37:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:19,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:19,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:37:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4520529] [2021-03-10 21:37:19,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:37:19,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:37:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:37:19,047 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:20,045 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-03-10 21:37:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:20,146 INFO L225 Difference]: With dead ends: 36111 [2021-03-10 21:37:20,146 INFO L226 Difference]: Without dead ends: 36111 [2021-03-10 21:37:20,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:37:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-03-10 21:37:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-03-10 21:37:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-03-10 21:37:20,958 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-03-10 21:37:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:20,958 INFO L480 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-03-10 21:37:20,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-03-10 21:37:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:21,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:21,004 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:21,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:21,205 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2090652707, now seen corresponding path program 25 times [2021-03-10 21:37:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:21,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039403443] [2021-03-10 21:37:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039403443] [2021-03-10 21:37:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695884073] [2021-03-10 21:37:21,239 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:21,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:21,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:21,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:37:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26677469] [2021-03-10 21:37:21,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:37:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:37:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:37:21,354 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:21,988 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-03-10 21:37:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:37:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:22,091 INFO L225 Difference]: With dead ends: 36261 [2021-03-10 21:37:22,092 INFO L226 Difference]: Without dead ends: 36201 [2021-03-10 21:37:22,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-03-10 21:37:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-03-10 21:37:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-03-10 21:37:22,874 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-03-10 21:37:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:22,875 INFO L480 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-03-10 21:37:22,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-03-10 21:37:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:22,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:22,923 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:23,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 21:37:23,123 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1499343799, now seen corresponding path program 26 times [2021-03-10 21:37:23,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:23,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737191598] [2021-03-10 21:37:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:23,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737191598] [2021-03-10 21:37:23,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115527420] [2021-03-10 21:37:23,171 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:37:23,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607946360] [2021-03-10 21:37:23,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:37:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:37:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:37:23,345 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:24,260 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-03-10 21:37:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:37:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2021-03-10 21:37:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:24,403 INFO L225 Difference]: With dead ends: 44495 [2021-03-10 21:37:24,403 INFO L226 Difference]: Without dead ends: 44495 [2021-03-10 21:37:24,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:37:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-03-10 21:37:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-03-10 21:37:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-03-10 21:37:25,247 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-03-10 21:37:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:25,247 INFO L480 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-03-10 21:37:25,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-03-10 21:37:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:25,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:25,291 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:25,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 21:37:25,491 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1395756233, now seen corresponding path program 27 times [2021-03-10 21:37:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:25,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562643287] [2021-03-10 21:37:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:25,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562643287] [2021-03-10 21:37:25,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108346736] [2021-03-10 21:37:25,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:37:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:25,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:25,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:37:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584237111] [2021-03-10 21:37:25,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:37:25,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:25,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:37:25,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:37:25,655 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:26,472 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-03-10 21:37:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:37:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 29 [2021-03-10 21:37:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:26,549 INFO L225 Difference]: With dead ends: 29398 [2021-03-10 21:37:26,549 INFO L226 Difference]: Without dead ends: 29314 [2021-03-10 21:37:26,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-03-10 21:37:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-03-10 21:37:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-03-10 21:37:26,959 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-03-10 21:37:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:26,959 INFO L480 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-03-10 21:37:26,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-03-10 21:37:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:26,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:27,000 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:27,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 21:37:27,200 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 926813189, now seen corresponding path program 28 times [2021-03-10 21:37:27,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:27,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842275230] [2021-03-10 21:37:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842275230] [2021-03-10 21:37:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970603134] [2021-03-10 21:37:27,228 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:27,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:27,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:27,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:27,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973831661] [2021-03-10 21:37:27,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:27,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:27,343 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:28,037 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-03-10 21:37:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:37:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 29 [2021-03-10 21:37:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:28,152 INFO L225 Difference]: With dead ends: 39779 [2021-03-10 21:37:28,153 INFO L226 Difference]: Without dead ends: 39779 [2021-03-10 21:37:28,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:37:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-03-10 21:37:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-03-10 21:37:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-03-10 21:37:28,709 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-03-10 21:37:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:28,710 INFO L480 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-03-10 21:37:28,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-03-10 21:37:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:28,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:28,745 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:28,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:37:28,946 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -580787067, now seen corresponding path program 29 times [2021-03-10 21:37:28,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:28,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898442893] [2021-03-10 21:37:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:28,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898442893] [2021-03-10 21:37:28,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461345273] [2021-03-10 21:37:28,983 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:29,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:37:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:29,240 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-03-10 21:37:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:29,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:29,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260058855] [2021-03-10 21:37:29,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:29,262 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) 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) [2021-03-10 21:37:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:29,910 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-03-10 21:37:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:37:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) 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 29 [2021-03-10 21:37:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:29,985 INFO L225 Difference]: With dead ends: 27775 [2021-03-10 21:37:29,985 INFO L226 Difference]: Without dead ends: 27747 [2021-03-10 21:37:29,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:37:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-03-10 21:37:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-03-10 21:37:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-03-10 21:37:30,496 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-03-10 21:37:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:30,496 INFO L480 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-03-10 21:37:30,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) 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) [2021-03-10 21:37:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-03-10 21:37:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:30,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:30,532 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:30,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:30,733 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1639739647, now seen corresponding path program 30 times [2021-03-10 21:37:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:30,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107867291] [2021-03-10 21:37:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107867291] [2021-03-10 21:37:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254082745] [2021-03-10 21:37:30,761 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:30,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:37:30,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:30,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:30,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:30,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134047292] [2021-03-10 21:37:30,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:30,887 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:31,668 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-03-10 21:37:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:37:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:31,755 INFO L225 Difference]: With dead ends: 31505 [2021-03-10 21:37:31,755 INFO L226 Difference]: Without dead ends: 31505 [2021-03-10 21:37:31,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:37:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-03-10 21:37:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-03-10 21:37:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-03-10 21:37:32,265 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-03-10 21:37:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:32,265 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-03-10 21:37:32,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-03-10 21:37:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:32,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:32,474 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:32,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 21:37:32,675 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1193128771, now seen corresponding path program 31 times [2021-03-10 21:37:32,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:32,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11301801] [2021-03-10 21:37:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11301801] [2021-03-10 21:37:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111245114] [2021-03-10 21:37:32,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:32,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:37:32,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848303439] [2021-03-10 21:37:32,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:32,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:32,814 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:33,331 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-03-10 21:37:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:37:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:33,428 INFO L225 Difference]: With dead ends: 38173 [2021-03-10 21:37:33,428 INFO L226 Difference]: Without dead ends: 38153 [2021-03-10 21:37:33,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:37:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-03-10 21:37:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-03-10 21:37:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-03-10 21:37:34,151 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-03-10 21:37:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:34,151 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-03-10 21:37:34,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-03-10 21:37:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:34,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:34,194 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:34,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:34,395 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1908486075, now seen corresponding path program 32 times [2021-03-10 21:37:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:34,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648955995] [2021-03-10 21:37:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:34,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648955995] [2021-03-10 21:37:34,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465693995] [2021-03-10 21:37:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:34,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:34,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:34,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:34,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248900693] [2021-03-10 21:37:34,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:34,572 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:36,064 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-03-10 21:37:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:37:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:36,181 INFO L225 Difference]: With dead ends: 44621 [2021-03-10 21:37:36,182 INFO L226 Difference]: Without dead ends: 44621 [2021-03-10 21:37:36,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:37:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-03-10 21:37:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-03-10 21:37:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-03-10 21:37:36,993 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-03-10 21:37:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:36,994 INFO L480 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-03-10 21:37:36,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-03-10 21:37:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:37,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:37,033 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:37,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:37,234 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 551235235, now seen corresponding path program 33 times [2021-03-10 21:37:37,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:37,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817470799] [2021-03-10 21:37:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:37,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817470799] [2021-03-10 21:37:37,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723687323] [2021-03-10 21:37:37,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:37:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:37:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:37,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:37,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:37:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615004374] [2021-03-10 21:37:37,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:37,390 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:38,256 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-03-10 21:37:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:37:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:38,375 INFO L225 Difference]: With dead ends: 44719 [2021-03-10 21:37:38,375 INFO L226 Difference]: Without dead ends: 44519 [2021-03-10 21:37:38,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:37:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-03-10 21:37:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-03-10 21:37:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-03-10 21:37:38,970 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-03-10 21:37:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:38,970 INFO L480 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-03-10 21:37:38,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-03-10 21:37:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:39,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:39,007 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:39,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:39,208 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1958174975, now seen corresponding path program 34 times [2021-03-10 21:37:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:39,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19270510] [2021-03-10 21:37:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:39,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19270510] [2021-03-10 21:37:39,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013123544] [2021-03-10 21:37:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:37:39,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:39,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:39,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:37:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324644220] [2021-03-10 21:37:39,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:39,369 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:39,688 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 21:37:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:40,685 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-03-10 21:37:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:37:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:40,793 INFO L225 Difference]: With dead ends: 38364 [2021-03-10 21:37:40,793 INFO L226 Difference]: Without dead ends: 38344 [2021-03-10 21:37:40,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:37:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-03-10 21:37:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-03-10 21:37:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-03-10 21:37:41,562 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-03-10 21:37:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:41,562 INFO L480 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-03-10 21:37:41,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-03-10 21:37:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:41,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:41,598 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:41,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:41,798 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash 347304223, now seen corresponding path program 35 times [2021-03-10 21:37:41,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:41,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003704322] [2021-03-10 21:37:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003704322] [2021-03-10 21:37:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086095871] [2021-03-10 21:37:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:41,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:37:41,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:41,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:41,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:37:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994323641] [2021-03-10 21:37:41,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:37:41,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:41,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:37:41,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:37:41,950 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:42,636 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-03-10 21:37:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:37:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:42,744 INFO L225 Difference]: With dead ends: 37284 [2021-03-10 21:37:42,745 INFO L226 Difference]: Without dead ends: 37184 [2021-03-10 21:37:42,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:37:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-03-10 21:37:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-03-10 21:37:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-03-10 21:37:43,500 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-03-10 21:37:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:43,500 INFO L480 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-03-10 21:37:43,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-03-10 21:37:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:43,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:43,539 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:43,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:37:43,740 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1371228231, now seen corresponding path program 16 times [2021-03-10 21:37:43,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:43,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195992833] [2021-03-10 21:37:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195992833] [2021-03-10 21:37:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353821681] [2021-03-10 21:37:43,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:37:43,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:37:43,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:43,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:43,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:37:43,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913040236] [2021-03-10 21:37:43,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:43,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:43,924 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:45,582 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-03-10 21:37:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:37:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 29 [2021-03-10 21:37:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:45,814 INFO L225 Difference]: With dead ends: 62502 [2021-03-10 21:37:45,814 INFO L226 Difference]: Without dead ends: 62502 [2021-03-10 21:37:45,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:37:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-03-10 21:37:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-03-10 21:37:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-03-10 21:37:46,661 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-03-10 21:37:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:46,661 INFO L480 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-03-10 21:37:46,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-03-10 21:37:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:47,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:47,002 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:47,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:47,203 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 955516921, now seen corresponding path program 17 times [2021-03-10 21:37:47,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:47,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095397977] [2021-03-10 21:37:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:47,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095397977] [2021-03-10 21:37:47,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870040428] [2021-03-10 21:37:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:47,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:37:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:47,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:47,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:37:47,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610643165] [2021-03-10 21:37:47,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:47,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:47,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:47,364 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:48,161 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-03-10 21:37:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:37:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:48,341 INFO L225 Difference]: With dead ends: 55112 [2021-03-10 21:37:48,341 INFO L226 Difference]: Without dead ends: 54872 [2021-03-10 21:37:48,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:37:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-03-10 21:37:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-03-10 21:37:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-03-10 21:37:49,450 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-03-10 21:37:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:49,451 INFO L480 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-03-10 21:37:49,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-03-10 21:37:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:49,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:49,529 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:49,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:37:49,731 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash 797970361, now seen corresponding path program 18 times [2021-03-10 21:37:49,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:49,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259250321] [2021-03-10 21:37:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:49,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259250321] [2021-03-10 21:37:49,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436612230] [2021-03-10 21:37:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:49,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:37:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:49,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:49,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:37:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203511664] [2021-03-10 21:37:49,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:37:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:37:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:37:49,852 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:50,758 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-03-10 21:37:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:37:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:50,954 INFO L225 Difference]: With dead ends: 55218 [2021-03-10 21:37:50,955 INFO L226 Difference]: Without dead ends: 55218 [2021-03-10 21:37:50,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:37:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-03-10 21:37:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-03-10 21:37:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-03-10 21:37:52,271 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-03-10 21:37:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:52,272 INFO L480 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-03-10 21:37:52,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-03-10 21:37:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:52,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:52,359 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:52,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:52,560 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash -980880199, now seen corresponding path program 19 times [2021-03-10 21:37:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:52,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725824734] [2021-03-10 21:37:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725824734] [2021-03-10 21:37:52,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783059470] [2021-03-10 21:37:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:52,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:52,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:37:52,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665448235] [2021-03-10 21:37:52,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:37:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:37:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:37:52,728 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:53,353 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-03-10 21:37:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:37:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:53,500 INFO L225 Difference]: With dead ends: 43486 [2021-03-10 21:37:53,500 INFO L226 Difference]: Without dead ends: 43461 [2021-03-10 21:37:53,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:37:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-03-10 21:37:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-03-10 21:37:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-03-10 21:37:54,645 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-03-10 21:37:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:54,645 INFO L480 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-03-10 21:37:54,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-03-10 21:37:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:54,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:54,722 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:54,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:54,923 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash 574436419, now seen corresponding path program 20 times [2021-03-10 21:37:54,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:54,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244340834] [2021-03-10 21:37:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:54,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244340834] [2021-03-10 21:37:54,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57295184] [2021-03-10 21:37:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:37:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:55,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:55,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-03-10 21:37:55,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327626872] [2021-03-10 21:37:55,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:55,120 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:56,401 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-03-10 21:37:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:37:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:37:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:56,698 INFO L225 Difference]: With dead ends: 91021 [2021-03-10 21:37:56,698 INFO L226 Difference]: Without dead ends: 91021 [2021-03-10 21:37:56,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:37:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-03-10 21:37:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-03-10 21:37:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-03-10 21:37:58,344 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-03-10 21:37:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:58,344 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-03-10 21:37:58,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-03-10 21:37:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:37:58,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:58,429 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:58,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:58,629 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1095807805, now seen corresponding path program 21 times [2021-03-10 21:37:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:58,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648562605] [2021-03-10 21:37:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648562605] [2021-03-10 21:37:58,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269350366] [2021-03-10 21:37:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:58,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:37:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:37:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:58,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:58,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-03-10 21:37:58,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103342084] [2021-03-10 21:37:58,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:37:58,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:37:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:37:58,776 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:00,030 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-03-10 21:38:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:38:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:00,274 INFO L225 Difference]: With dead ends: 65131 [2021-03-10 21:38:00,274 INFO L226 Difference]: Without dead ends: 65083 [2021-03-10 21:38:00,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:38:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-03-10 21:38:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-03-10 21:38:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-03-10 21:38:01,628 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-03-10 21:38:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:01,628 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-03-10 21:38:01,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-03-10 21:38:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:01,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:01,710 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:01,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:01,911 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:01,911 INFO L82 PathProgramCache]: Analyzing trace with hash -41638717, now seen corresponding path program 22 times [2021-03-10 21:38:01,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:01,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277767437] [2021-03-10 21:38:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277767437] [2021-03-10 21:38:01,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164699183] [2021-03-10 21:38:01,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:38:01,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:01,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:02,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:02,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-03-10 21:38:02,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920460257] [2021-03-10 21:38:02,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:02,062 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:03,485 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-03-10 21:38:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:38:03,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:03,765 INFO L225 Difference]: With dead ends: 80813 [2021-03-10 21:38:03,765 INFO L226 Difference]: Without dead ends: 80813 [2021-03-10 21:38:03,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:38:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-03-10 21:38:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-03-10 21:38:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-03-10 21:38:05,222 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-03-10 21:38:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:05,223 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-03-10 21:38:05,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-03-10 21:38:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:05,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:05,309 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:05,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 21:38:05,510 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1820489277, now seen corresponding path program 23 times [2021-03-10 21:38:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425925557] [2021-03-10 21:38:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:05,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425925557] [2021-03-10 21:38:05,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609983506] [2021-03-10 21:38:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:05,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:38:05,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:05,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:05,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-03-10 21:38:05,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088329229] [2021-03-10 21:38:05,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:05,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:05,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:05,679 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:06,407 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-03-10 21:38:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:38:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:07,168 INFO L225 Difference]: With dead ends: 70173 [2021-03-10 21:38:07,168 INFO L226 Difference]: Without dead ends: 70123 [2021-03-10 21:38:07,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:38:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-03-10 21:38:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432. [2021-03-10 21:38:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445326066629264) internal successors, (166393), 37431 states have internal predecessors, (166393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166393 transitions. [2021-03-10 21:38:08,748 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166393 transitions. Word has length 29 [2021-03-10 21:38:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:08,748 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166393 transitions. [2021-03-10 21:38:08,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166393 transitions. [2021-03-10 21:38:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:08,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:08,839 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:09,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:09,040 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -901124473, now seen corresponding path program 24 times [2021-03-10 21:38:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:09,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650643825] [2021-03-10 21:38:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650643825] [2021-03-10 21:38:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267078518] [2021-03-10 21:38:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:09,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:38:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:09,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:09,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:38:09,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754396955] [2021-03-10 21:38:09,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:38:09,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:38:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:38:09,210 INFO L87 Difference]: Start difference. First operand 37432 states and 166393 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:10,377 INFO L93 Difference]: Finished difference Result 71774 states and 303967 transitions. [2021-03-10 21:38:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:38:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:10,623 INFO L225 Difference]: With dead ends: 71774 [2021-03-10 21:38:10,623 INFO L226 Difference]: Without dead ends: 71774 [2021-03-10 21:38:10,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:38:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71774 states. [2021-03-10 21:38:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71774 to 35977. [2021-03-10 21:38:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35977 states, 35976 states have (on average 4.413970424727596) internal successors, (158797), 35976 states have internal predecessors, (158797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35977 states to 35977 states and 158797 transitions. [2021-03-10 21:38:12,118 INFO L78 Accepts]: Start accepts. Automaton has 35977 states and 158797 transitions. Word has length 29 [2021-03-10 21:38:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:12,118 INFO L480 AbstractCegarLoop]: Abstraction has 35977 states and 158797 transitions. [2021-03-10 21:38:12,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 35977 states and 158797 transitions. [2021-03-10 21:38:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:12,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:12,201 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:12,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:12,402 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1406910881, now seen corresponding path program 25 times [2021-03-10 21:38:12,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:12,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278609293] [2021-03-10 21:38:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278609293] [2021-03-10 21:38:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756201978] [2021-03-10 21:38:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:12,839 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-03-10 21:38:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:12,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:12,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:38:12,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629984755] [2021-03-10 21:38:12,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:38:12,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:38:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:38:12,911 INFO L87 Difference]: Start difference. First operand 35977 states and 158797 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:13,637 INFO L93 Difference]: Finished difference Result 58206 states and 243463 transitions. [2021-03-10 21:38:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:38:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:13,826 INFO L225 Difference]: With dead ends: 58206 [2021-03-10 21:38:13,827 INFO L226 Difference]: Without dead ends: 58131 [2021-03-10 21:38:13,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:38:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2021-03-10 21:38:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 36089. [2021-03-10 21:38:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36088 states have (on average 4.4117989359343825) internal successors, (159213), 36088 states have internal predecessors, (159213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 159213 transitions. [2021-03-10 21:38:15,152 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 159213 transitions. Word has length 29 [2021-03-10 21:38:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:15,152 INFO L480 AbstractCegarLoop]: Abstraction has 36089 states and 159213 transitions. [2021-03-10 21:38:15,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 159213 transitions. [2021-03-10 21:38:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:15,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:15,236 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:15,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 21:38:15,439 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1914596929, now seen corresponding path program 26 times [2021-03-10 21:38:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:15,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435203218] [2021-03-10 21:38:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:15,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435203218] [2021-03-10 21:38:15,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038530593] [2021-03-10 21:38:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:38:15,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:38:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:15,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:15,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:38:15,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185121041] [2021-03-10 21:38:15,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:38:15,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:38:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:38:15,635 INFO L87 Difference]: Start difference. First operand 36089 states and 159213 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:17,067 INFO L93 Difference]: Finished difference Result 73446 states and 309536 transitions. [2021-03-10 21:38:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:38:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:17,327 INFO L225 Difference]: With dead ends: 73446 [2021-03-10 21:38:17,327 INFO L226 Difference]: Without dead ends: 73446 [2021-03-10 21:38:17,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:38:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73446 states. [2021-03-10 21:38:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73446 to 35349. [2021-03-10 21:38:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35349 states, 35348 states have (on average 4.388536833767115) internal successors, (155126), 35348 states have internal predecessors, (155126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35349 states to 35349 states and 155126 transitions. [2021-03-10 21:38:18,610 INFO L78 Accepts]: Start accepts. Automaton has 35349 states and 155126 transitions. Word has length 29 [2021-03-10 21:38:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:18,610 INFO L480 AbstractCegarLoop]: Abstraction has 35349 states and 155126 transitions. [2021-03-10 21:38:18,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 35349 states and 155126 transitions. [2021-03-10 21:38:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:18,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:18,679 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:18,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:18,880 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash -701527489, now seen corresponding path program 27 times [2021-03-10 21:38:18,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:18,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469881795] [2021-03-10 21:38:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469881795] [2021-03-10 21:38:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063122728] [2021-03-10 21:38:18,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:38:18,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:38:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:19,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:19,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:38:19,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288147426] [2021-03-10 21:38:19,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:38:19,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:38:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:38:19,044 INFO L87 Difference]: Start difference. First operand 35349 states and 155126 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:19,753 INFO L93 Difference]: Finished difference Result 54059 states and 225007 transitions. [2021-03-10 21:38:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:38:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:19,928 INFO L225 Difference]: With dead ends: 54059 [2021-03-10 21:38:19,928 INFO L226 Difference]: Without dead ends: 53987 [2021-03-10 21:38:19,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:38:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53987 states. [2021-03-10 21:38:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53987 to 33989. [2021-03-10 21:38:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.398140520183595) internal successors, (149484), 33988 states have internal predecessors, (149484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149484 transitions. [2021-03-10 21:38:21,226 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149484 transitions. Word has length 29 [2021-03-10 21:38:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:21,226 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149484 transitions. [2021-03-10 21:38:21,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149484 transitions. [2021-03-10 21:38:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:21,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:21,301 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:21,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 21:38:21,501 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash -196251261, now seen corresponding path program 28 times [2021-03-10 21:38:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:21,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825104811] [2021-03-10 21:38:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825104811] [2021-03-10 21:38:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843259908] [2021-03-10 21:38:21,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:21,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:21,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:21,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:21,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:21,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:38:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940310368] [2021-03-10 21:38:21,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:38:21,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:38:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:21,647 INFO L87 Difference]: Start difference. First operand 33989 states and 149484 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:22,686 INFO L93 Difference]: Finished difference Result 63659 states and 263324 transitions. [2021-03-10 21:38:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:38:22,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:22,900 INFO L225 Difference]: With dead ends: 63659 [2021-03-10 21:38:22,900 INFO L226 Difference]: Without dead ends: 63659 [2021-03-10 21:38:22,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:38:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63659 states. [2021-03-10 21:38:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63659 to 33989. [2021-03-10 21:38:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.391138048723079) internal successors, (149246), 33988 states have internal predecessors, (149246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149246 transitions. [2021-03-10 21:38:24,191 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149246 transitions. Word has length 29 [2021-03-10 21:38:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:24,191 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149246 transitions. [2021-03-10 21:38:24,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149246 transitions. [2021-03-10 21:38:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:24,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:24,268 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:24,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:38:24,468 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1866495485, now seen corresponding path program 29 times [2021-03-10 21:38:24,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:24,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636861087] [2021-03-10 21:38:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:24,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636861087] [2021-03-10 21:38:24,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515708850] [2021-03-10 21:38:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:24,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:38:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:24,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:24,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:38:24,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168409012] [2021-03-10 21:38:24,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:38:24,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:24,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:38:24,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:24,605 INFO L87 Difference]: Start difference. First operand 33989 states and 149246 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:25,227 INFO L93 Difference]: Finished difference Result 49482 states and 206551 transitions. [2021-03-10 21:38:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:38:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:25,393 INFO L225 Difference]: With dead ends: 49482 [2021-03-10 21:38:25,393 INFO L226 Difference]: Without dead ends: 49458 [2021-03-10 21:38:25,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:38:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49458 states. [2021-03-10 21:38:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49458 to 33537. [2021-03-10 21:38:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33537 states, 33536 states have (on average 4.385376908396947) internal successors, (147068), 33536 states have internal predecessors, (147068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33537 states to 33537 states and 147068 transitions. [2021-03-10 21:38:26,564 INFO L78 Accepts]: Start accepts. Automaton has 33537 states and 147068 transitions. Word has length 29 [2021-03-10 21:38:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:26,564 INFO L480 AbstractCegarLoop]: Abstraction has 33537 states and 147068 transitions. [2021-03-10 21:38:26,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33537 states and 147068 transitions. [2021-03-10 21:38:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:26,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:26,641 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:26,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:26,842 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash -812326397, now seen corresponding path program 30 times [2021-03-10 21:38:26,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:26,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426203906] [2021-03-10 21:38:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:26,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426203906] [2021-03-10 21:38:26,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519317539] [2021-03-10 21:38:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:26,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:38:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:26,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:26,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:38:26,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414582898] [2021-03-10 21:38:26,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:38:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:38:26,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:26,984 INFO L87 Difference]: Start difference. First operand 33537 states and 147068 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:28,143 INFO L93 Difference]: Finished difference Result 58652 states and 245549 transitions. [2021-03-10 21:38:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:38:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:28,362 INFO L225 Difference]: With dead ends: 58652 [2021-03-10 21:38:28,363 INFO L226 Difference]: Without dead ends: 58652 [2021-03-10 21:38:28,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:38:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58652 states. [2021-03-10 21:38:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58652 to 33775. [2021-03-10 21:38:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.384378516018239) internal successors, (148078), 33774 states have internal predecessors, (148078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148078 transitions. [2021-03-10 21:38:29,628 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148078 transitions. Word has length 29 [2021-03-10 21:38:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:29,628 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148078 transitions. [2021-03-10 21:38:29,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148078 transitions. [2021-03-10 21:38:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:29,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:29,725 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:29,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:29,943 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1703790339, now seen corresponding path program 31 times [2021-03-10 21:38:29,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:29,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155600388] [2021-03-10 21:38:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155600388] [2021-03-10 21:38:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948072180] [2021-03-10 21:38:29,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:30,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:30,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:38:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975525131] [2021-03-10 21:38:30,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:38:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:38:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:30,083 INFO L87 Difference]: Start difference. First operand 33775 states and 148078 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:30,754 INFO L93 Difference]: Finished difference Result 57310 states and 235132 transitions. [2021-03-10 21:38:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:38:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:30,944 INFO L225 Difference]: With dead ends: 57310 [2021-03-10 21:38:30,944 INFO L226 Difference]: Without dead ends: 57285 [2021-03-10 21:38:30,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:38:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57285 states. [2021-03-10 21:38:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57285 to 33775. [2021-03-10 21:38:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.3840232131225205) internal successors, (148066), 33774 states have internal predecessors, (148066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148066 transitions. [2021-03-10 21:38:32,141 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148066 transitions. Word has length 29 [2021-03-10 21:38:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:32,141 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148066 transitions. [2021-03-10 21:38:32,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148066 transitions. [2021-03-10 21:38:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:32,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:32,218 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:32,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:32,419 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1671812153, now seen corresponding path program 32 times [2021-03-10 21:38:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719136335] [2021-03-10 21:38:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719136335] [2021-03-10 21:38:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738209622] [2021-03-10 21:38:32,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:32,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:38:32,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:32,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:32,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:38:32,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838449808] [2021-03-10 21:38:32,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:32,565 INFO L87 Difference]: Start difference. First operand 33775 states and 148066 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:34,431 INFO L93 Difference]: Finished difference Result 79431 states and 334909 transitions. [2021-03-10 21:38:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:38:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:34,685 INFO L225 Difference]: With dead ends: 79431 [2021-03-10 21:38:34,685 INFO L226 Difference]: Without dead ends: 79431 [2021-03-10 21:38:34,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:38:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79431 states. [2021-03-10 21:38:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79431 to 34251. [2021-03-10 21:38:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34251 states, 34250 states have (on average 4.38207299270073) internal successors, (150086), 34250 states have internal predecessors, (150086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34251 states to 34251 states and 150086 transitions. [2021-03-10 21:38:36,126 INFO L78 Accepts]: Start accepts. Automaton has 34251 states and 150086 transitions. Word has length 29 [2021-03-10 21:38:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:36,126 INFO L480 AbstractCegarLoop]: Abstraction has 34251 states and 150086 transitions. [2021-03-10 21:38:36,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 34251 states and 150086 transitions. [2021-03-10 21:38:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:36,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:36,214 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:36,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:36,436 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash 636223201, now seen corresponding path program 33 times [2021-03-10 21:38:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:36,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252580256] [2021-03-10 21:38:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:36,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252580256] [2021-03-10 21:38:36,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296226730] [2021-03-10 21:38:36,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:38:36,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:38:36,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:36,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:36,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:36,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:38:36,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947915954] [2021-03-10 21:38:36,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:36,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:36,640 INFO L87 Difference]: Start difference. First operand 34251 states and 150086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:37,468 INFO L93 Difference]: Finished difference Result 73063 states and 296904 transitions. [2021-03-10 21:38:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:38:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 29 [2021-03-10 21:38:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:38,115 INFO L225 Difference]: With dead ends: 73063 [2021-03-10 21:38:38,115 INFO L226 Difference]: Without dead ends: 72813 [2021-03-10 21:38:38,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:38:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72813 states. [2021-03-10 21:38:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72813 to 34704. [2021-03-10 21:38:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34704 states, 34703 states have (on average 4.386681266749273) internal successors, (152231), 34703 states have internal predecessors, (152231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34704 states to 34704 states and 152231 transitions. [2021-03-10 21:38:39,115 INFO L78 Accepts]: Start accepts. Automaton has 34704 states and 152231 transitions. Word has length 29 [2021-03-10 21:38:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 34704 states and 152231 transitions. [2021-03-10 21:38:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34704 states and 152231 transitions. [2021-03-10 21:38:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:39,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:39,195 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:39,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:39,395 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -871060793, now seen corresponding path program 34 times [2021-03-10 21:38:39,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:39,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11964620] [2021-03-10 21:38:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11964620] [2021-03-10 21:38:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302977476] [2021-03-10 21:38:39,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:39,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:39,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:39,867 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-03-10 21:38:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:39,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:39,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:38:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947805911] [2021-03-10 21:38:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:39,944 INFO L87 Difference]: Start difference. First operand 34704 states and 152231 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:41,390 INFO L93 Difference]: Finished difference Result 60164 states and 255426 transitions. [2021-03-10 21:38:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:38:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:41,575 INFO L225 Difference]: With dead ends: 60164 [2021-03-10 21:38:41,575 INFO L226 Difference]: Without dead ends: 60139 [2021-03-10 21:38:41,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:38:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60139 states. [2021-03-10 21:38:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60139 to 34900. [2021-03-10 21:38:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34900 states, 34899 states have (on average 4.346571535001003) internal successors, (151691), 34899 states have internal predecessors, (151691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 151691 transitions. [2021-03-10 21:38:42,807 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 151691 transitions. Word has length 29 [2021-03-10 21:38:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:42,807 INFO L480 AbstractCegarLoop]: Abstraction has 34900 states and 151691 transitions. [2021-03-10 21:38:42,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 151691 transitions. [2021-03-10 21:38:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:38:42,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:42,880 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:43,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 21:38:43,081 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1199680033, now seen corresponding path program 35 times [2021-03-10 21:38:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:43,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26878295] [2021-03-10 21:38:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:43,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26878295] [2021-03-10 21:38:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42599101] [2021-03-10 21:38:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:43,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:38:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:38:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:43,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:43,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:38:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122622175] [2021-03-10 21:38:43,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:38:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:38:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:38:43,248 INFO L87 Difference]: Start difference. First operand 34900 states and 151691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:44,254 INFO L93 Difference]: Finished difference Result 58744 states and 238407 transitions. [2021-03-10 21:38:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:38:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:38:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:44,430 INFO L225 Difference]: With dead ends: 58744 [2021-03-10 21:38:44,430 INFO L226 Difference]: Without dead ends: 58603 [2021-03-10 21:38:44,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:38:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-03-10 21:38:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 35796. [2021-03-10 21:38:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 4.330828327978768) internal successors, (155022), 35795 states have internal predecessors, (155022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 155022 transitions. [2021-03-10 21:38:45,702 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 155022 transitions. Word has length 29 [2021-03-10 21:38:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:45,703 INFO L480 AbstractCegarLoop]: Abstraction has 35796 states and 155022 transitions. [2021-03-10 21:38:45,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 155022 transitions. [2021-03-10 21:38:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:38:45,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:45,783 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:45,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:45,983 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 886143307, now seen corresponding path program 36 times [2021-03-10 21:38:45,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:45,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86426986] [2021-03-10 21:38:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:46,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86426986] [2021-03-10 21:38:46,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015308977] [2021-03-10 21:38:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:46,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:38:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:38:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:46,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:46,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-03-10 21:38:46,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396621812] [2021-03-10 21:38:46,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:38:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:38:46,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:46,266 INFO L87 Difference]: Start difference. First operand 35796 states and 155022 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:46,778 INFO L93 Difference]: Finished difference Result 38312 states and 164159 transitions. [2021-03-10 21:38:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:38:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 31 [2021-03-10 21:38:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:46,892 INFO L225 Difference]: With dead ends: 38312 [2021-03-10 21:38:46,893 INFO L226 Difference]: Without dead ends: 38244 [2021-03-10 21:38:46,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:38:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38244 states. [2021-03-10 21:38:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38244 to 36866. [2021-03-10 21:38:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 4.320493693204937) internal successors, (159275), 36865 states have internal predecessors, (159275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 159275 transitions. [2021-03-10 21:38:47,944 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 159275 transitions. Word has length 31 [2021-03-10 21:38:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:47,945 INFO L480 AbstractCegarLoop]: Abstraction has 36866 states and 159275 transitions. [2021-03-10 21:38:47,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:47,945 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 159275 transitions. [2021-03-10 21:38:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:38:48,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:48,028 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:48,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:48,228 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 948308035, now seen corresponding path program 37 times [2021-03-10 21:38:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:48,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558608108] [2021-03-10 21:38:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:38:48,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558608108] [2021-03-10 21:38:48,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059175222] [2021-03-10 21:38:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:38:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates...