/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/test/easy11.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:39:00,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:39:00,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:39:00,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:39:00,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-06 00:39:00,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:39:00,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:39:00,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:39:00,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:39:00,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:39:00,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:39:00,527 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:39:00,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:39:00,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:39:00,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:39:00,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:39:00,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:39:00,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:39:00,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:39:00,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:39:00,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:39:00,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:39:00,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:39:00,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:39:00,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:39:00,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:39:00,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:39:00,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:39:00,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:39:00,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:39:00,847 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:39:00,849 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:39:00,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl [2021-06-06 00:39:00,850 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl' [2021-06-06 00:39:00,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:39:01,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:39:01,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:39:01,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:39:01,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:39:01,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:39:01,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:39:01,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:39:01,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:39:01,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... [2021-06-06 00:39:01,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:39:01,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:39:01,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:39:01,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:39:01,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:39:01,125 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:39:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:39:01,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:39:01,125 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:39:01,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:39:01,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:39:01,126 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:39:01,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:39:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:39:01,127 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:39:01,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:39:01,310 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:39:01,312 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:39:01 BoogieIcfgContainer [2021-06-06 00:39:01,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:39:01,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:39:01,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:39:01,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:39:01,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:39:00" (1/2) ... [2021-06-06 00:39:01,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1360ef5f and model type easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:39:01, skipping insertion in model container [2021-06-06 00:39:01,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:39:01" (2/2) ... [2021-06-06 00:39:01,321 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.bpl [2021-06-06 00:39:01,330 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:39:01,331 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:39:01,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:39:01,333 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:39:01,384 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,385 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,385 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,385 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,385 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,385 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,386 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,386 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,386 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,386 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,386 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,387 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,387 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,387 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,387 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,388 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,388 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,388 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,388 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,388 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,389 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,389 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,389 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,389 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,391 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,397 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-06 00:39:01,406 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-06 00:39:01,424 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-06 00:39:01,445 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:39:01,445 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:39:01,445 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:39:01,445 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:39:01,445 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:39:01,445 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:39:01,446 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:39:01,446 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:39:01,456 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-06 00:39:01,471 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:01,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:01,480 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:01,501 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:01,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1728152339, now seen corresponding path program 1 times [2021-06-06 00:39:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:01,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422868678] [2021-06-06 00:39:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:01,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422868678] [2021-06-06 00:39:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422868678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:01,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:01,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174324054] [2021-06-06 00:39:01,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:01,843 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 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 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:02,107 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-06-06 00:39:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:02,122 INFO L225 Difference]: With dead ends: 98 [2021-06-06 00:39:02,122 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:02,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-06-06 00:39:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-06 00:39:02,168 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 15 [2021-06-06 00:39:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:02,168 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-06 00:39:02,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-06 00:39:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:02,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:02,170 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:39:02,171 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2019667169, now seen corresponding path program 2 times [2021-06-06 00:39:02,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:02,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293469756] [2021-06-06 00:39:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293469756] [2021-06-06 00:39:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293469756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:02,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:02,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583152786] [2021-06-06 00:39:02,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:02,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:02,289 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:02,486 INFO L93 Difference]: Finished difference Result 98 states and 190 transitions. [2021-06-06 00:39:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:02,490 INFO L225 Difference]: With dead ends: 98 [2021-06-06 00:39:02,490 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:02,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-06-06 00:39:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 127 transitions. [2021-06-06 00:39:02,511 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 127 transitions. Word has length 15 [2021-06-06 00:39:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:02,511 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 127 transitions. [2021-06-06 00:39:02,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 127 transitions. [2021-06-06 00:39:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:02,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:02,513 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:02,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:39:02,514 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash 949033841, now seen corresponding path program 3 times [2021-06-06 00:39:02,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:02,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379441928] [2021-06-06 00:39:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:02,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:02,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379441928] [2021-06-06 00:39:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379441928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:02,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:02,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683112754] [2021-06-06 00:39:02,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:02,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:02,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:02,658 INFO L87 Difference]: Start difference. First operand 66 states and 127 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:02,819 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-06 00:39:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:02,822 INFO L225 Difference]: With dead ends: 89 [2021-06-06 00:39:02,822 INFO L226 Difference]: Without dead ends: 79 [2021-06-06 00:39:02,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-06 00:39:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-06 00:39:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 128 transitions. [2021-06-06 00:39:02,835 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 128 transitions. Word has length 15 [2021-06-06 00:39:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:02,835 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 128 transitions. [2021-06-06 00:39:02,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 128 transitions. [2021-06-06 00:39:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:02,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:02,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:02,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:39:02,837 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1619078043, now seen corresponding path program 4 times [2021-06-06 00:39:02,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:02,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661448220] [2021-06-06 00:39:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:02,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:02,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661448220] [2021-06-06 00:39:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661448220] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:02,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:02,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:02,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649824695] [2021-06-06 00:39:02,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:02,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:02,968 INFO L87 Difference]: Start difference. First operand 67 states and 128 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:03,135 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-06-06 00:39:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:03,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:03,136 INFO L225 Difference]: With dead ends: 88 [2021-06-06 00:39:03,137 INFO L226 Difference]: Without dead ends: 78 [2021-06-06 00:39:03,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-06 00:39:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-06-06 00:39:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-06 00:39:03,141 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 15 [2021-06-06 00:39:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:03,141 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-06 00:39:03,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-06 00:39:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:03,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:03,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:03,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-06 00:39:03,142 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:03,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash 168516007, now seen corresponding path program 5 times [2021-06-06 00:39:03,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:03,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895599215] [2021-06-06 00:39:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895599215] [2021-06-06 00:39:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895599215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:03,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:03,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:03,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478733851] [2021-06-06 00:39:03,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:03,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:03,228 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:03,417 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-06-06 00:39:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:03,418 INFO L225 Difference]: With dead ends: 106 [2021-06-06 00:39:03,418 INFO L226 Difference]: Without dead ends: 96 [2021-06-06 00:39:03,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-06 00:39:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-06-06 00:39:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-06-06 00:39:03,422 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-06-06 00:39:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:03,423 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-06-06 00:39:03,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-06-06 00:39:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:03,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:03,424 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:03,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-06 00:39:03,424 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1157750279, now seen corresponding path program 6 times [2021-06-06 00:39:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:03,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526661671] [2021-06-06 00:39:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:03,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:03,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526661671] [2021-06-06 00:39:03,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526661671] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:03,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:03,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:03,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399563697] [2021-06-06 00:39:03,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:03,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:03,520 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:03,680 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-06 00:39:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:03,681 INFO L225 Difference]: With dead ends: 98 [2021-06-06 00:39:03,681 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:03,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-06-06 00:39:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-06 00:39:03,692 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-06 00:39:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:03,692 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-06 00:39:03,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-06 00:39:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:03,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:03,695 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:03,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-06 00:39:03,696 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash -487706077, now seen corresponding path program 7 times [2021-06-06 00:39:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:03,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658027100] [2021-06-06 00:39:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:03,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:03,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658027100] [2021-06-06 00:39:03,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658027100] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:03,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:03,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984252562] [2021-06-06 00:39:03,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:03,797 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:03,945 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-06 00:39:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:03,946 INFO L225 Difference]: With dead ends: 97 [2021-06-06 00:39:03,947 INFO L226 Difference]: Without dead ends: 87 [2021-06-06 00:39:03,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-06 00:39:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-06-06 00:39:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-06 00:39:03,950 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-06-06 00:39:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:03,950 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-06 00:39:03,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-06 00:39:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:03,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:03,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:03,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-06 00:39:03,951 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash -82039123, now seen corresponding path program 8 times [2021-06-06 00:39:03,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:03,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718649691] [2021-06-06 00:39:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:04,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:04,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718649691] [2021-06-06 00:39:04,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718649691] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:04,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:04,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:04,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123980541] [2021-06-06 00:39:04,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:04,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:04,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:04,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:04,044 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:04,213 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-06 00:39:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:04,214 INFO L225 Difference]: With dead ends: 95 [2021-06-06 00:39:04,214 INFO L226 Difference]: Without dead ends: 85 [2021-06-06 00:39:04,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-06 00:39:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-06-06 00:39:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-06 00:39:04,222 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-06 00:39:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:04,222 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-06 00:39:04,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-06 00:39:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:04,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:04,222 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:04,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-06 00:39:04,223 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash 588005079, now seen corresponding path program 9 times [2021-06-06 00:39:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:04,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486671335] [2021-06-06 00:39:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:04,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:04,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486671335] [2021-06-06 00:39:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486671335] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:04,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:04,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053493892] [2021-06-06 00:39:04,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:04,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:04,319 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:04,483 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-06 00:39:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:04,485 INFO L225 Difference]: With dead ends: 94 [2021-06-06 00:39:04,486 INFO L226 Difference]: Without dead ends: 84 [2021-06-06 00:39:04,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-06 00:39:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-06-06 00:39:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-06 00:39:04,488 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 15 [2021-06-06 00:39:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:04,488 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-06 00:39:04,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-06 00:39:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:04,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:04,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:04,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-06 00:39:04,489 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2044309529, now seen corresponding path program 10 times [2021-06-06 00:39:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:04,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712158660] [2021-06-06 00:39:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:04,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712158660] [2021-06-06 00:39:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712158660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:04,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:04,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:04,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800598918] [2021-06-06 00:39:04,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:04,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:04,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:04,570 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:04,744 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-06-06 00:39:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:04,745 INFO L225 Difference]: With dead ends: 97 [2021-06-06 00:39:04,745 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:04,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-06-06 00:39:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2021-06-06 00:39:04,748 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 15 [2021-06-06 00:39:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:04,748 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2021-06-06 00:39:04,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2021-06-06 00:39:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:04,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:04,749 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:04,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-06 00:39:04,749 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1160181413, now seen corresponding path program 11 times [2021-06-06 00:39:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105959710] [2021-06-06 00:39:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:04,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:04,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105959710] [2021-06-06 00:39:04,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105959710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:04,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:04,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:04,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129452267] [2021-06-06 00:39:04,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:04,825 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:04,986 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2021-06-06 00:39:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:04,987 INFO L225 Difference]: With dead ends: 110 [2021-06-06 00:39:04,987 INFO L226 Difference]: Without dead ends: 100 [2021-06-06 00:39:04,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-06 00:39:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-06 00:39:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-06 00:39:04,990 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 15 [2021-06-06 00:39:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:04,990 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-06 00:39:04,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-06 00:39:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:04,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:04,991 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:04,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-06 00:39:04,991 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1808519597, now seen corresponding path program 12 times [2021-06-06 00:39:04,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:04,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328271402] [2021-06-06 00:39:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:05,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:05,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328271402] [2021-06-06 00:39:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328271402] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945889952] [2021-06-06 00:39:05,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:05,061 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:05,225 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-06-06 00:39:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:05,226 INFO L225 Difference]: With dead ends: 102 [2021-06-06 00:39:05,226 INFO L226 Difference]: Without dead ends: 92 [2021-06-06 00:39:05,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-06 00:39:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-06 00:39:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-06 00:39:05,229 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-06 00:39:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:05,229 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-06 00:39:05,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-06 00:39:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:05,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:05,230 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:05,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-06 00:39:05,230 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:05,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1816403497, now seen corresponding path program 13 times [2021-06-06 00:39:05,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:05,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374623411] [2021-06-06 00:39:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:05,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374623411] [2021-06-06 00:39:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374623411] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:05,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:05,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:05,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325154825] [2021-06-06 00:39:05,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:05,303 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:05,446 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-06 00:39:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:05,447 INFO L225 Difference]: With dead ends: 101 [2021-06-06 00:39:05,447 INFO L226 Difference]: Without dead ends: 91 [2021-06-06 00:39:05,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-06 00:39:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-06 00:39:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-06 00:39:05,450 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 15 [2021-06-06 00:39:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-06 00:39:05,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-06 00:39:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:05,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:05,451 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:05,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-06 00:39:05,451 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1410736543, now seen corresponding path program 14 times [2021-06-06 00:39:05,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:05,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989743389] [2021-06-06 00:39:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:05,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:05,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989743389] [2021-06-06 00:39:05,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989743389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:05,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:05,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:05,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741012196] [2021-06-06 00:39:05,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:05,524 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:05,670 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-06 00:39:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:05,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:05,671 INFO L225 Difference]: With dead ends: 104 [2021-06-06 00:39:05,671 INFO L226 Difference]: Without dead ends: 94 [2021-06-06 00:39:05,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-06 00:39:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-06 00:39:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-06 00:39:05,674 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-06 00:39:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:05,674 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-06 00:39:05,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-06 00:39:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:05,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:05,675 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:05,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-06 00:39:05,675 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -740692341, now seen corresponding path program 15 times [2021-06-06 00:39:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:05,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733070274] [2021-06-06 00:39:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:05,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:05,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733070274] [2021-06-06 00:39:05,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733070274] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:05,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:05,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:05,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528858120] [2021-06-06 00:39:05,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:05,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:05,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:05,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:05,743 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:05,894 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-06 00:39:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:05,895 INFO L225 Difference]: With dead ends: 103 [2021-06-06 00:39:05,895 INFO L226 Difference]: Without dead ends: 93 [2021-06-06 00:39:05,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-06 00:39:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-06-06 00:39:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-06-06 00:39:05,898 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 15 [2021-06-06 00:39:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:05,898 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-06-06 00:39:05,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-06-06 00:39:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:05,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:05,899 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:05,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-06 00:39:05,899 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 921960347, now seen corresponding path program 16 times [2021-06-06 00:39:05,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:05,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092382145] [2021-06-06 00:39:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:05,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:05,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092382145] [2021-06-06 00:39:05,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092382145] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:05,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:05,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645001996] [2021-06-06 00:39:05,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:05,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:05,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:05,969 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:06,134 INFO L93 Difference]: Finished difference Result 106 states and 212 transitions. [2021-06-06 00:39:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:06,138 INFO L225 Difference]: With dead ends: 106 [2021-06-06 00:39:06,138 INFO L226 Difference]: Without dead ends: 97 [2021-06-06 00:39:06,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-06 00:39:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2021-06-06 00:39:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-06-06 00:39:06,141 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 15 [2021-06-06 00:39:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:06,141 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-06-06 00:39:06,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-06-06 00:39:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:06,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:06,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:06,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-06 00:39:06,142 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:06,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1329337487, now seen corresponding path program 17 times [2021-06-06 00:39:06,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:06,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997497158] [2021-06-06 00:39:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:06,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997497158] [2021-06-06 00:39:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997497158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:06,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:06,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878334682] [2021-06-06 00:39:06,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:06,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:06,233 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:06,364 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-06-06 00:39:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:06,365 INFO L225 Difference]: With dead ends: 95 [2021-06-06 00:39:06,365 INFO L226 Difference]: Without dead ends: 85 [2021-06-06 00:39:06,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-06 00:39:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-06-06 00:39:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-06-06 00:39:06,367 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 15 [2021-06-06 00:39:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:06,368 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-06-06 00:39:06,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-06-06 00:39:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:06,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:06,368 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-06 00:39:06,368 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -659293285, now seen corresponding path program 18 times [2021-06-06 00:39:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:06,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178272598] [2021-06-06 00:39:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:06,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178272598] [2021-06-06 00:39:06,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178272598] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:06,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:06,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484378265] [2021-06-06 00:39:06,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:06,434 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:06,573 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2021-06-06 00:39:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:06,575 INFO L225 Difference]: With dead ends: 94 [2021-06-06 00:39:06,575 INFO L226 Difference]: Without dead ends: 84 [2021-06-06 00:39:06,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-06 00:39:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-06-06 00:39:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-06 00:39:06,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 15 [2021-06-06 00:39:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:06,582 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-06 00:39:06,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-06 00:39:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:06,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:06,583 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:06,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-06 00:39:06,583 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359403, now seen corresponding path program 19 times [2021-06-06 00:39:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:06,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417947016] [2021-06-06 00:39:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:06,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:06,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417947016] [2021-06-06 00:39:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417947016] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:06,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:06,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:06,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112036137] [2021-06-06 00:39:06,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:06,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:06,705 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:06,839 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-06 00:39:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:06,840 INFO L225 Difference]: With dead ends: 97 [2021-06-06 00:39:06,840 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:06,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-06-06 00:39:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.971830985915493) internal successors, (140), 71 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2021-06-06 00:39:06,843 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 15 [2021-06-06 00:39:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:06,843 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2021-06-06 00:39:06,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2021-06-06 00:39:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:39:06,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:06,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:06,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-06 00:39:06,844 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -67100201, now seen corresponding path program 20 times [2021-06-06 00:39:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013405479] [2021-06-06 00:39:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:06,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013405479] [2021-06-06 00:39:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013405479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-06 00:39:06,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991635868] [2021-06-06 00:39:06,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:39:06,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:39:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:06,920 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:07,046 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-06-06 00:39:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:39:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:39:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:07,047 INFO L225 Difference]: With dead ends: 103 [2021-06-06 00:39:07,047 INFO L226 Difference]: Without dead ends: 94 [2021-06-06 00:39:07,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:39:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-06 00:39:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-06 00:39:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 143 transitions. [2021-06-06 00:39:07,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 143 transitions. Word has length 15 [2021-06-06 00:39:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:07,050 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 143 transitions. [2021-06-06 00:39:07,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 143 transitions. [2021-06-06 00:39:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:07,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:07,051 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:07,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-06 00:39:07,051 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:07,051 INFO L82 PathProgramCache]: Analyzing trace with hash -55242805, now seen corresponding path program 1 times [2021-06-06 00:39:07,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:07,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165922376] [2021-06-06 00:39:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:07,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:07,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165922376] [2021-06-06 00:39:07,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165922376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:07,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268144713] [2021-06-06 00:39:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:39:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:07,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268144713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:07,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:07,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:07,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649436714] [2021-06-06 00:39:07,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:07,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:07,229 INFO L87 Difference]: Start difference. First operand 74 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:07,325 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-06 00:39:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:07,326 INFO L225 Difference]: With dead ends: 108 [2021-06-06 00:39:07,326 INFO L226 Difference]: Without dead ends: 108 [2021-06-06 00:39:07,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-06 00:39:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-06-06 00:39:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-06-06 00:39:07,330 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 17 [2021-06-06 00:39:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:07,331 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-06-06 00:39:07,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-06-06 00:39:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:07,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:07,332 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:07,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-06 00:39:07,559 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1323979185, now seen corresponding path program 1 times [2021-06-06 00:39:07,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:07,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383833176] [2021-06-06 00:39:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:07,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383833176] [2021-06-06 00:39:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383833176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:07,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:07,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96089006] [2021-06-06 00:39:07,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:07,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:07,579 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:07,633 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-06-06 00:39:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:07,634 INFO L225 Difference]: With dead ends: 120 [2021-06-06 00:39:07,634 INFO L226 Difference]: Without dead ends: 109 [2021-06-06 00:39:07,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-06 00:39:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-06-06 00:39:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-06 00:39:07,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 17 [2021-06-06 00:39:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:07,637 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-06 00:39:07,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-06 00:39:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:07,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:07,637 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:07,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-06 00:39:07,637 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131849, now seen corresponding path program 2 times [2021-06-06 00:39:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023121129] [2021-06-06 00:39:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:07,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:07,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023121129] [2021-06-06 00:39:07,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023121129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:07,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581698378] [2021-06-06 00:39:07,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:07,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:07,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:39:07,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581698378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:07,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:07,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711720627] [2021-06-06 00:39:07,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:07,756 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:07,820 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-06-06 00:39:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:07,821 INFO L225 Difference]: With dead ends: 116 [2021-06-06 00:39:07,821 INFO L226 Difference]: Without dead ends: 116 [2021-06-06 00:39:07,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-06 00:39:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2021-06-06 00:39:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-06-06 00:39:07,824 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 17 [2021-06-06 00:39:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:07,824 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-06-06 00:39:07,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-06-06 00:39:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:07,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:07,825 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:39:08,041 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 308167817, now seen corresponding path program 2 times [2021-06-06 00:39:08,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482300132] [2021-06-06 00:39:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482300132] [2021-06-06 00:39:08,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482300132] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119612468] [2021-06-06 00:39:08,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,060 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,137 INFO L93 Difference]: Finished difference Result 153 states and 286 transitions. [2021-06-06 00:39:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,138 INFO L225 Difference]: With dead ends: 153 [2021-06-06 00:39:08,138 INFO L226 Difference]: Without dead ends: 149 [2021-06-06 00:39:08,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-06 00:39:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 80. [2021-06-06 00:39:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-06 00:39:08,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 17 [2021-06-06 00:39:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,142 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-06 00:39:08,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-06 00:39:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-06 00:39:08,142 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1656584079, now seen corresponding path program 3 times [2021-06-06 00:39:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263937600] [2021-06-06 00:39:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263937600] [2021-06-06 00:39:08,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263937600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512505983] [2021-06-06 00:39:08,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,161 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,233 INFO L93 Difference]: Finished difference Result 126 states and 243 transitions. [2021-06-06 00:39:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,234 INFO L225 Difference]: With dead ends: 126 [2021-06-06 00:39:08,234 INFO L226 Difference]: Without dead ends: 126 [2021-06-06 00:39:08,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-06 00:39:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-06 00:39:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-06 00:39:08,237 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-06 00:39:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,237 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-06 00:39:08,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-06 00:39:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,238 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-06 00:39:08,238 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2146658699, now seen corresponding path program 3 times [2021-06-06 00:39:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163289339] [2021-06-06 00:39:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163289339] [2021-06-06 00:39:08,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163289339] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477253050] [2021-06-06 00:39:08,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,257 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,316 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-06 00:39:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,317 INFO L225 Difference]: With dead ends: 86 [2021-06-06 00:39:08,317 INFO L226 Difference]: Without dead ends: 83 [2021-06-06 00:39:08,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-06 00:39:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-06 00:39:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-06 00:39:08,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-06 00:39:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,320 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-06 00:39:08,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-06 00:39:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,320 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-06 00:39:08,321 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash -60801859, now seen corresponding path program 4 times [2021-06-06 00:39:08,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419309216] [2021-06-06 00:39:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419309216] [2021-06-06 00:39:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419309216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:08,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915005491] [2021-06-06 00:39:08,338 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:08,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:08,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:39:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915005491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:08,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:08,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:39:08,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389060862] [2021-06-06 00:39:08,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,405 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,478 INFO L93 Difference]: Finished difference Result 124 states and 233 transitions. [2021-06-06 00:39:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,479 INFO L225 Difference]: With dead ends: 124 [2021-06-06 00:39:08,479 INFO L226 Difference]: Without dead ends: 124 [2021-06-06 00:39:08,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-06 00:39:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-06-06 00:39:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-06 00:39:08,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-06 00:39:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,481 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-06 00:39:08,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-06 00:39:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,482 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:39:08,698 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,699 INFO L82 PathProgramCache]: Analyzing trace with hash -964765891, now seen corresponding path program 4 times [2021-06-06 00:39:08,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73347204] [2021-06-06 00:39:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73347204] [2021-06-06 00:39:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73347204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583454205] [2021-06-06 00:39:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,719 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,774 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-06 00:39:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:39:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,775 INFO L225 Difference]: With dead ends: 113 [2021-06-06 00:39:08,775 INFO L226 Difference]: Without dead ends: 109 [2021-06-06 00:39:08,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-06 00:39:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-06 00:39:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-06 00:39:08,777 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-06 00:39:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,777 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-06 00:39:08,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-06 00:39:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,778 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-06 00:39:08,778 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash 383650371, now seen corresponding path program 5 times [2021-06-06 00:39:08,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880387951] [2021-06-06 00:39:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880387951] [2021-06-06 00:39:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880387951] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602854361] [2021-06-06 00:39:08,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,799 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,870 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2021-06-06 00:39:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,871 INFO L225 Difference]: With dead ends: 114 [2021-06-06 00:39:08,871 INFO L226 Difference]: Without dead ends: 114 [2021-06-06 00:39:08,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-06 00:39:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-06-06 00:39:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-06 00:39:08,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-06 00:39:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,876 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-06 00:39:08,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-06 00:39:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,876 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-06 00:39:08,877 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,877 INFO L82 PathProgramCache]: Analyzing trace with hash 873724991, now seen corresponding path program 5 times [2021-06-06 00:39:08,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350829850] [2021-06-06 00:39:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350829850] [2021-06-06 00:39:08,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350829850] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124582351] [2021-06-06 00:39:08,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,897 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:08,969 INFO L93 Difference]: Finished difference Result 139 states and 260 transitions. [2021-06-06 00:39:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:39:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:08,970 INFO L225 Difference]: With dead ends: 139 [2021-06-06 00:39:08,970 INFO L226 Difference]: Without dead ends: 136 [2021-06-06 00:39:08,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:39:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-06 00:39:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-06-06 00:39:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.975) internal successors, (158), 80 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 158 transitions. [2021-06-06 00:39:08,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 158 transitions. Word has length 17 [2021-06-06 00:39:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:08,974 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 158 transitions. [2021-06-06 00:39:08,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 158 transitions. [2021-06-06 00:39:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:08,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:08,974 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:08,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-06 00:39:08,974 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1721217585, now seen corresponding path program 6 times [2021-06-06 00:39:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:08,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317067118] [2021-06-06 00:39:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:08,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:08,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317067118] [2021-06-06 00:39:08,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317067118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:08,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:08,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050419258] [2021-06-06 00:39:08,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:08,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:08,996 INFO L87 Difference]: Start difference. First operand 81 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:09,057 INFO L93 Difference]: Finished difference Result 105 states and 195 transitions. [2021-06-06 00:39:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:09,058 INFO L225 Difference]: With dead ends: 105 [2021-06-06 00:39:09,058 INFO L226 Difference]: Without dead ends: 105 [2021-06-06 00:39:09,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-06 00:39:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-06-06 00:39:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-06 00:39:09,061 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 17 [2021-06-06 00:39:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:09,061 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-06 00:39:09,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-06 00:39:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:39:09,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:09,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:09,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-06 00:39:09,062 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1788806479, now seen corresponding path program 6 times [2021-06-06 00:39:09,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:09,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770871819] [2021-06-06 00:39:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:09,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770871819] [2021-06-06 00:39:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770871819] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:09,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:39:09,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:39:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294454857] [2021-06-06 00:39:09,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:39:09,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:39:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:39:09,084 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:09,134 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-06 00:39:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:39:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:39:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:09,135 INFO L225 Difference]: With dead ends: 82 [2021-06-06 00:39:09,135 INFO L226 Difference]: Without dead ends: 76 [2021-06-06 00:39:09,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:39:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-06 00:39:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-06-06 00:39:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2021-06-06 00:39:09,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2021-06-06 00:39:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:09,139 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2021-06-06 00:39:09,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2021-06-06 00:39:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:09,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:09,140 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:09,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-06 00:39:09,140 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 24314285, now seen corresponding path program 1 times [2021-06-06 00:39:09,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:09,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52965564] [2021-06-06 00:39:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:09,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52965564] [2021-06-06 00:39:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52965564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151009805] [2021-06-06 00:39:09,247 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 [2021-06-06 00:39:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151009805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119406428] [2021-06-06 00:39:09,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:09,489 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:09,733 INFO L93 Difference]: Finished difference Result 87 states and 162 transitions. [2021-06-06 00:39:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:09,734 INFO L225 Difference]: With dead ends: 87 [2021-06-06 00:39:09,734 INFO L226 Difference]: Without dead ends: 60 [2021-06-06 00:39:09,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:39:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-06 00:39:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-06-06 00:39:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-06-06 00:39:09,736 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 19 [2021-06-06 00:39:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:09,736 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-06-06 00:39:09,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-06-06 00:39:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:09,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:09,737 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:09,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:09,953 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash -640382641, now seen corresponding path program 2 times [2021-06-06 00:39:09,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:09,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40050327] [2021-06-06 00:39:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:10,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:10,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40050327] [2021-06-06 00:39:10,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40050327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:10,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926696321] [2021-06-06 00:39:10,057 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:10,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:10,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:10,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926696321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:10,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:10,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:10,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168761198] [2021-06-06 00:39:10,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:10,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:10,303 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:10,529 INFO L93 Difference]: Finished difference Result 78 states and 138 transitions. [2021-06-06 00:39:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:10,530 INFO L225 Difference]: With dead ends: 78 [2021-06-06 00:39:10,530 INFO L226 Difference]: Without dead ends: 62 [2021-06-06 00:39:10,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:39:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-06 00:39:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-06-06 00:39:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2021-06-06 00:39:10,532 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 19 [2021-06-06 00:39:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:10,532 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2021-06-06 00:39:10,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2021-06-06 00:39:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:10,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:10,532 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:10,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-06 00:39:10,741 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 111018267, now seen corresponding path program 3 times [2021-06-06 00:39:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:10,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556845981] [2021-06-06 00:39:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:10,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:10,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556845981] [2021-06-06 00:39:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556845981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:10,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774395774] [2021-06-06 00:39:10,843 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:10,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:10,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:10,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:10,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:11,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774395774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:11,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:11,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116852297] [2021-06-06 00:39:11,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:11,080 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:11,271 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-06-06 00:39:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:11,271 INFO L225 Difference]: With dead ends: 80 [2021-06-06 00:39:11,272 INFO L226 Difference]: Without dead ends: 67 [2021-06-06 00:39:11,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:39:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-06 00:39:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-06-06 00:39:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-06 00:39:11,274 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 19 [2021-06-06 00:39:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:11,274 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-06 00:39:11,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-06 00:39:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:11,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:11,274 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:11,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:11,497 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1215248019, now seen corresponding path program 4 times [2021-06-06 00:39:11,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:11,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157918159] [2021-06-06 00:39:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:11,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:11,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157918159] [2021-06-06 00:39:11,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157918159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:11,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658034535] [2021-06-06 00:39:11,611 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:11,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:11,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658034535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:11,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:11,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:11,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118267965] [2021-06-06 00:39:11,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:11,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:11,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:11,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:11,867 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:12,295 INFO L93 Difference]: Finished difference Result 109 states and 201 transitions. [2021-06-06 00:39:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:39:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:12,296 INFO L225 Difference]: With dead ends: 109 [2021-06-06 00:39:12,296 INFO L226 Difference]: Without dead ends: 99 [2021-06-06 00:39:12,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:39:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-06 00:39:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-06-06 00:39:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 161 transitions. [2021-06-06 00:39:12,298 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 161 transitions. Word has length 19 [2021-06-06 00:39:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 161 transitions. [2021-06-06 00:39:12,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 161 transitions. [2021-06-06 00:39:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:12,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:12,299 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:12,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-06 00:39:12,521 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash -545203817, now seen corresponding path program 5 times [2021-06-06 00:39:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:12,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467945407] [2021-06-06 00:39:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:12,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:12,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467945407] [2021-06-06 00:39:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467945407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:12,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168206804] [2021-06-06 00:39:12,636 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:12,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:12,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168206804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:12,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:12,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:12,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324246948] [2021-06-06 00:39:12,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:12,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:12,880 INFO L87 Difference]: Start difference. First operand 86 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:12,943 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2021-06-06 00:39:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:12,944 INFO L225 Difference]: With dead ends: 96 [2021-06-06 00:39:12,944 INFO L226 Difference]: Without dead ends: 78 [2021-06-06 00:39:12,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-06 00:39:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-06-06 00:39:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 76 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 146 transitions. [2021-06-06 00:39:12,947 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 146 transitions. Word has length 19 [2021-06-06 00:39:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:12,947 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 146 transitions. [2021-06-06 00:39:12,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 146 transitions. [2021-06-06 00:39:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:12,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:12,947 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:13,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:39:13,157 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1290089747, now seen corresponding path program 6 times [2021-06-06 00:39:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712890371] [2021-06-06 00:39:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:13,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:13,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712890371] [2021-06-06 00:39:13,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712890371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:13,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290501946] [2021-06-06 00:39:13,249 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:13,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:13,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290501946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:13,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:13,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:13,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097413827] [2021-06-06 00:39:13,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:13,468 INFO L87 Difference]: Start difference. First operand 77 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:13,803 INFO L93 Difference]: Finished difference Result 108 states and 202 transitions. [2021-06-06 00:39:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:13,804 INFO L225 Difference]: With dead ends: 108 [2021-06-06 00:39:13,804 INFO L226 Difference]: Without dead ends: 92 [2021-06-06 00:39:13,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-06 00:39:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-06 00:39:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 82 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 158 transitions. [2021-06-06 00:39:13,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 158 transitions. Word has length 19 [2021-06-06 00:39:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:13,806 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 158 transitions. [2021-06-06 00:39:13,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2021-06-06 00:39:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:13,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:13,807 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:14,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-06 00:39:14,013 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -538688839, now seen corresponding path program 7 times [2021-06-06 00:39:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:14,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685631451] [2021-06-06 00:39:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:14,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:14,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685631451] [2021-06-06 00:39:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685631451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:14,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187040758] [2021-06-06 00:39:14,111 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187040758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:14,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:14,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513187451] [2021-06-06 00:39:14,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:14,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:14,364 INFO L87 Difference]: Start difference. First operand 83 states and 158 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:14,648 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-06 00:39:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:14,649 INFO L225 Difference]: With dead ends: 113 [2021-06-06 00:39:14,649 INFO L226 Difference]: Without dead ends: 100 [2021-06-06 00:39:14,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-06 00:39:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-06-06 00:39:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2021-06-06 00:39:14,652 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2021-06-06 00:39:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:14,652 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2021-06-06 00:39:14,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2021-06-06 00:39:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:14,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:14,653 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:14,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:39:14,853 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1864955125, now seen corresponding path program 8 times [2021-06-06 00:39:14,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:14,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266306959] [2021-06-06 00:39:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:14,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266306959] [2021-06-06 00:39:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266306959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763710754] [2021-06-06 00:39:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:14,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:14,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:14,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:15,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763710754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:15,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:15,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:15,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275462246] [2021-06-06 00:39:15,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:15,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:15,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:15,175 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:15,275 INFO L93 Difference]: Finished difference Result 101 states and 183 transitions. [2021-06-06 00:39:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:15,276 INFO L225 Difference]: With dead ends: 101 [2021-06-06 00:39:15,276 INFO L226 Difference]: Without dead ends: 88 [2021-06-06 00:39:15,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-06 00:39:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-06-06 00:39:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 159 transitions. [2021-06-06 00:39:15,279 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 159 transitions. Word has length 19 [2021-06-06 00:39:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 159 transitions. [2021-06-06 00:39:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 159 transitions. [2021-06-06 00:39:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:15,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:15,279 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:39:15,493 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1194910923, now seen corresponding path program 9 times [2021-06-06 00:39:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735782123] [2021-06-06 00:39:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:15,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:15,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735782123] [2021-06-06 00:39:15,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735782123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:15,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177791358] [2021-06-06 00:39:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:15,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:15,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177791358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:15,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:15,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730311781] [2021-06-06 00:39:15,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:15,825 INFO L87 Difference]: Start difference. First operand 84 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:15,918 INFO L93 Difference]: Finished difference Result 93 states and 170 transitions. [2021-06-06 00:39:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:15,919 INFO L225 Difference]: With dead ends: 93 [2021-06-06 00:39:15,919 INFO L226 Difference]: Without dead ends: 81 [2021-06-06 00:39:15,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-06 00:39:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-06-06 00:39:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.925) internal successors, (154), 80 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 154 transitions. [2021-06-06 00:39:15,921 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 154 transitions. Word has length 19 [2021-06-06 00:39:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 154 transitions. [2021-06-06 00:39:15,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 154 transitions. [2021-06-06 00:39:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:15,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:15,922 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:16,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:16,146 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1143148071, now seen corresponding path program 10 times [2021-06-06 00:39:16,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:16,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134430306] [2021-06-06 00:39:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:16,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134430306] [2021-06-06 00:39:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134430306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604771450] [2021-06-06 00:39:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:16,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:16,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604771450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:16,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:16,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:16,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589271297] [2021-06-06 00:39:16,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:16,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:16,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:16,476 INFO L87 Difference]: Start difference. First operand 81 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:17,337 INFO L93 Difference]: Finished difference Result 176 states and 352 transitions. [2021-06-06 00:39:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:39:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:17,338 INFO L225 Difference]: With dead ends: 176 [2021-06-06 00:39:17,338 INFO L226 Difference]: Without dead ends: 159 [2021-06-06 00:39:17,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 784.8ms TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:39:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-06 00:39:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-06-06 00:39:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 218 transitions. [2021-06-06 00:39:17,342 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 218 transitions. Word has length 19 [2021-06-06 00:39:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:17,342 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 218 transitions. [2021-06-06 00:39:17,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 218 transitions. [2021-06-06 00:39:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:17,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:17,342 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-06 00:39:17,553 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 486925987, now seen corresponding path program 11 times [2021-06-06 00:39:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430556599] [2021-06-06 00:39:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:17,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:17,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430556599] [2021-06-06 00:39:17,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430556599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:17,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213435959] [2021-06-06 00:39:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:17,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:17,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:17,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213435959] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:17,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:17,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:17,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248447551] [2021-06-06 00:39:17,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:17,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:17,860 INFO L87 Difference]: Start difference. First operand 108 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:18,025 INFO L93 Difference]: Finished difference Result 138 states and 273 transitions. [2021-06-06 00:39:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:18,026 INFO L225 Difference]: With dead ends: 138 [2021-06-06 00:39:18,026 INFO L226 Difference]: Without dead ends: 127 [2021-06-06 00:39:18,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:39:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-06 00:39:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-06-06 00:39:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-06 00:39:18,032 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-06 00:39:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:18,033 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-06 00:39:18,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-06 00:39:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:18,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:18,034 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:18,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:18,257 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1562637143, now seen corresponding path program 12 times [2021-06-06 00:39:18,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:18,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657035619] [2021-06-06 00:39:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:18,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657035619] [2021-06-06 00:39:18,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657035619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137883957] [2021-06-06 00:39:18,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:18,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:18,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137883957] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:18,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:18,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:18,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801158428] [2021-06-06 00:39:18,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:18,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:18,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:18,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:18,553 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:18,716 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-06 00:39:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:18,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:18,717 INFO L225 Difference]: With dead ends: 128 [2021-06-06 00:39:18,717 INFO L226 Difference]: Without dead ends: 118 [2021-06-06 00:39:18,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:39:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-06 00:39:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-06-06 00:39:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-06 00:39:18,720 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-06 00:39:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:18,720 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-06 00:39:18,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-06 00:39:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:18,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:18,720 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-06 00:39:18,937 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1069677465, now seen corresponding path program 13 times [2021-06-06 00:39:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:18,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163083087] [2021-06-06 00:39:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:19,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:19,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163083087] [2021-06-06 00:39:19,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163083087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:19,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105659346] [2021-06-06 00:39:19,022 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:19,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105659346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:19,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:19,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383515999] [2021-06-06 00:39:19,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:19,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:19,228 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:19,498 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-06 00:39:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:39:19,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:19,499 INFO L225 Difference]: With dead ends: 128 [2021-06-06 00:39:19,499 INFO L226 Difference]: Without dead ends: 119 [2021-06-06 00:39:19,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-06 00:39:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-06 00:39:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-06 00:39:19,502 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-06 00:39:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:19,502 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-06 00:39:19,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-06 00:39:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:19,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:19,502 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:19,717 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1532453059, now seen corresponding path program 14 times [2021-06-06 00:39:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27960104] [2021-06-06 00:39:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:19,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:19,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27960104] [2021-06-06 00:39:19,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27960104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:19,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570521200] [2021-06-06 00:39:19,827 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:19,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:19,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:20,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570521200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:20,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:20,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508468591] [2021-06-06 00:39:20,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:20,016 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:20,453 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-06-06 00:39:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:39:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:20,456 INFO L225 Difference]: With dead ends: 202 [2021-06-06 00:39:20,456 INFO L226 Difference]: Without dead ends: 191 [2021-06-06 00:39:20,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:39:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-06 00:39:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2021-06-06 00:39:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-06 00:39:20,459 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-06 00:39:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:20,459 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-06 00:39:20,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-06 00:39:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:20,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:20,460 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:20,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-06 00:39:20,661 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:20,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1450387207, now seen corresponding path program 15 times [2021-06-06 00:39:20,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:20,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868533058] [2021-06-06 00:39:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:20,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868533058] [2021-06-06 00:39:20,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868533058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:20,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108944511] [2021-06-06 00:39:20,758 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:20,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:20,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:20,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108944511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:20,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:20,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:20,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114265723] [2021-06-06 00:39:20,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:20,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:20,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:20,987 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:21,240 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-06-06 00:39:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:39:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:21,241 INFO L225 Difference]: With dead ends: 184 [2021-06-06 00:39:21,241 INFO L226 Difference]: Without dead ends: 171 [2021-06-06 00:39:21,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:39:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-06 00:39:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-06-06 00:39:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1842105263157894) internal successors, (332), 152 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 332 transitions. [2021-06-06 00:39:21,246 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 332 transitions. Word has length 19 [2021-06-06 00:39:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:21,246 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 332 transitions. [2021-06-06 00:39:21,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 332 transitions. [2021-06-06 00:39:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:21,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:21,246 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:21,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:39:21,461 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1731743665, now seen corresponding path program 16 times [2021-06-06 00:39:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:21,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656813152] [2021-06-06 00:39:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:21,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:21,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656813152] [2021-06-06 00:39:21,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656813152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:21,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108149604] [2021-06-06 00:39:21,555 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:21,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:21,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108149604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:21,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:21,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:21,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773852948] [2021-06-06 00:39:21,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:21,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:21,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:21,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:21,761 INFO L87 Difference]: Start difference. First operand 153 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:22,366 INFO L93 Difference]: Finished difference Result 335 states and 734 transitions. [2021-06-06 00:39:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:39:22,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:22,367 INFO L225 Difference]: With dead ends: 335 [2021-06-06 00:39:22,367 INFO L226 Difference]: Without dead ends: 319 [2021-06-06 00:39:22,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:39:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-06 00:39:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2021-06-06 00:39:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2600896860986546) internal successors, (504), 223 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 504 transitions. [2021-06-06 00:39:22,373 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 504 transitions. Word has length 19 [2021-06-06 00:39:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:22,373 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 504 transitions. [2021-06-06 00:39:22,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 504 transitions. [2021-06-06 00:39:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:22,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:22,374 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:22,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:39:22,589 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1036341529, now seen corresponding path program 17 times [2021-06-06 00:39:22,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:22,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684483131] [2021-06-06 00:39:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:22,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684483131] [2021-06-06 00:39:22,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684483131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750338928] [2021-06-06 00:39:22,674 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:22,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:22,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:22,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750338928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:22,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:22,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:22,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25965012] [2021-06-06 00:39:22,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:22,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:22,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:22,834 INFO L87 Difference]: Start difference. First operand 224 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:23,234 INFO L93 Difference]: Finished difference Result 349 states and 784 transitions. [2021-06-06 00:39:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:39:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:23,235 INFO L225 Difference]: With dead ends: 349 [2021-06-06 00:39:23,235 INFO L226 Difference]: Without dead ends: 332 [2021-06-06 00:39:23,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:39:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-06 00:39:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 250. [2021-06-06 00:39:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3453815261044175) internal successors, (584), 249 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 584 transitions. [2021-06-06 00:39:23,241 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 584 transitions. Word has length 19 [2021-06-06 00:39:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:23,241 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 584 transitions. [2021-06-06 00:39:23,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 584 transitions. [2021-06-06 00:39:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:23,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:23,242 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:23,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:39:23,457 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:23,457 INFO L82 PathProgramCache]: Analyzing trace with hash 881151661, now seen corresponding path program 18 times [2021-06-06 00:39:23,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:23,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8309863] [2021-06-06 00:39:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:23,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8309863] [2021-06-06 00:39:23,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8309863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802192148] [2021-06-06 00:39:23,551 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:23,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802192148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:23,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380678223] [2021-06-06 00:39:23,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:23,750 INFO L87 Difference]: Start difference. First operand 250 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:23,966 INFO L93 Difference]: Finished difference Result 293 states and 661 transitions. [2021-06-06 00:39:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:23,966 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:23,967 INFO L225 Difference]: With dead ends: 293 [2021-06-06 00:39:23,967 INFO L226 Difference]: Without dead ends: 277 [2021-06-06 00:39:23,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:39:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-06 00:39:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 250. [2021-06-06 00:39:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3373493975903616) internal successors, (582), 249 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 582 transitions. [2021-06-06 00:39:23,974 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 582 transitions. Word has length 19 [2021-06-06 00:39:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 582 transitions. [2021-06-06 00:39:23,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 582 transitions. [2021-06-06 00:39:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:23,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:23,987 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:24,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-06 00:39:24,209 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash 306286283, now seen corresponding path program 19 times [2021-06-06 00:39:24,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:24,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671441291] [2021-06-06 00:39:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:24,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671441291] [2021-06-06 00:39:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671441291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249510474] [2021-06-06 00:39:24,298 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:24,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249510474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:24,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:24,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178818554] [2021-06-06 00:39:24,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:24,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:24,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:24,507 INFO L87 Difference]: Start difference. First operand 250 states and 582 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:24,764 INFO L93 Difference]: Finished difference Result 290 states and 653 transitions. [2021-06-06 00:39:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:24,765 INFO L225 Difference]: With dead ends: 290 [2021-06-06 00:39:24,765 INFO L226 Difference]: Without dead ends: 273 [2021-06-06 00:39:24,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-06 00:39:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 248. [2021-06-06 00:39:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3441295546558703) internal successors, (579), 247 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 579 transitions. [2021-06-06 00:39:24,770 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 579 transitions. Word has length 19 [2021-06-06 00:39:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:24,771 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 579 transitions. [2021-06-06 00:39:24,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 579 transitions. [2021-06-06 00:39:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:24,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:24,771 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:24,994 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash 976330485, now seen corresponding path program 20 times [2021-06-06 00:39:24,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:24,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932239375] [2021-06-06 00:39:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:25,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932239375] [2021-06-06 00:39:25,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932239375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804769261] [2021-06-06 00:39:25,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:25,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:25,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804769261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:25,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352532740] [2021-06-06 00:39:25,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:25,295 INFO L87 Difference]: Start difference. First operand 248 states and 579 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:25,544 INFO L93 Difference]: Finished difference Result 277 states and 632 transitions. [2021-06-06 00:39:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:25,546 INFO L225 Difference]: With dead ends: 277 [2021-06-06 00:39:25,546 INFO L226 Difference]: Without dead ends: 265 [2021-06-06 00:39:25,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-06 00:39:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-06-06 00:39:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.341463414634146) internal successors, (576), 246 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 576 transitions. [2021-06-06 00:39:25,551 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 576 transitions. Word has length 19 [2021-06-06 00:39:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:25,551 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 576 transitions. [2021-06-06 00:39:25,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 576 transitions. [2021-06-06 00:39:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:25,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:25,552 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:25,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-06 00:39:25,761 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1636799901, now seen corresponding path program 21 times [2021-06-06 00:39:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:25,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926420509] [2021-06-06 00:39:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:25,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926420509] [2021-06-06 00:39:25,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926420509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53980228] [2021-06-06 00:39:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:25,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:25,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53980228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220898102] [2021-06-06 00:39:26,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:26,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:26,063 INFO L87 Difference]: Start difference. First operand 247 states and 576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:26,450 INFO L93 Difference]: Finished difference Result 368 states and 842 transitions. [2021-06-06 00:39:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:39:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:26,451 INFO L225 Difference]: With dead ends: 368 [2021-06-06 00:39:26,451 INFO L226 Difference]: Without dead ends: 356 [2021-06-06 00:39:26,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:39:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-06 00:39:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-06-06 00:39:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.350806451612903) internal successors, (583), 248 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 583 transitions. [2021-06-06 00:39:26,457 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 583 transitions. Word has length 19 [2021-06-06 00:39:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:26,457 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 583 transitions. [2021-06-06 00:39:26,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 583 transitions. [2021-06-06 00:39:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:26,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:26,458 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:26,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:26,673 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -561088745, now seen corresponding path program 22 times [2021-06-06 00:39:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:26,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360878786] [2021-06-06 00:39:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:26,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360878786] [2021-06-06 00:39:26,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360878786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:26,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821246415] [2021-06-06 00:39:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:26,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:26,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:26,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821246415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:26,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:26,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:26,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721861237] [2021-06-06 00:39:26,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:26,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:26,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:26,929 INFO L87 Difference]: Start difference. First operand 249 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:27,546 INFO L93 Difference]: Finished difference Result 314 states and 713 transitions. [2021-06-06 00:39:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:39:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:27,547 INFO L225 Difference]: With dead ends: 314 [2021-06-06 00:39:27,547 INFO L226 Difference]: Without dead ends: 303 [2021-06-06 00:39:27,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:39:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-06 00:39:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2021-06-06 00:39:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.342857142857143) internal successors, (574), 245 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 574 transitions. [2021-06-06 00:39:27,552 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 574 transitions. Word has length 19 [2021-06-06 00:39:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:27,553 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 574 transitions. [2021-06-06 00:39:27,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 574 transitions. [2021-06-06 00:39:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:27,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:27,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:27,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-06 00:39:27,769 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563943, now seen corresponding path program 23 times [2021-06-06 00:39:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:27,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889909275] [2021-06-06 00:39:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:27,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:27,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889909275] [2021-06-06 00:39:27,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889909275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:27,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154525464] [2021-06-06 00:39:27,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:27,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:27,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:28,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154525464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:28,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:28,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818684194] [2021-06-06 00:39:28,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:28,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:28,049 INFO L87 Difference]: Start difference. First operand 246 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:28,540 INFO L93 Difference]: Finished difference Result 388 states and 906 transitions. [2021-06-06 00:39:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:39:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:28,541 INFO L225 Difference]: With dead ends: 388 [2021-06-06 00:39:28,541 INFO L226 Difference]: Without dead ends: 379 [2021-06-06 00:39:28,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:39:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-06 00:39:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 256. [2021-06-06 00:39:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.392156862745098) internal successors, (610), 255 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 610 transitions. [2021-06-06 00:39:28,547 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 610 transitions. Word has length 19 [2021-06-06 00:39:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:28,547 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 610 transitions. [2021-06-06 00:39:28,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 610 transitions. [2021-06-06 00:39:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:28,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:28,548 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:28,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:28,772 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1247703337, now seen corresponding path program 24 times [2021-06-06 00:39:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:28,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993320541] [2021-06-06 00:39:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:28,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993320541] [2021-06-06 00:39:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993320541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867572521] [2021-06-06 00:39:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:28,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:28,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867572521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:29,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281009824] [2021-06-06 00:39:29,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:29,037 INFO L87 Difference]: Start difference. First operand 256 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:29,323 INFO L93 Difference]: Finished difference Result 361 states and 831 transitions. [2021-06-06 00:39:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:39:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:29,324 INFO L225 Difference]: With dead ends: 361 [2021-06-06 00:39:29,324 INFO L226 Difference]: Without dead ends: 344 [2021-06-06 00:39:29,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:39:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-06 00:39:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 291. [2021-06-06 00:39:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.406896551724138) internal successors, (698), 290 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 698 transitions. [2021-06-06 00:39:29,330 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 698 transitions. Word has length 19 [2021-06-06 00:39:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:29,330 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 698 transitions. [2021-06-06 00:39:29,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 698 transitions. [2021-06-06 00:39:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:29,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:29,331 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:29,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:39:29,554 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:29,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193749, now seen corresponding path program 25 times [2021-06-06 00:39:29,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:29,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371888003] [2021-06-06 00:39:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371888003] [2021-06-06 00:39:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371888003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786770575] [2021-06-06 00:39:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:29,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:29,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786770575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:29,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:29,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:29,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5298520] [2021-06-06 00:39:29,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:29,873 INFO L87 Difference]: Start difference. First operand 291 states and 698 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:30,301 INFO L93 Difference]: Finished difference Result 506 states and 1196 transitions. [2021-06-06 00:39:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:39:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:30,303 INFO L225 Difference]: With dead ends: 506 [2021-06-06 00:39:30,303 INFO L226 Difference]: Without dead ends: 489 [2021-06-06 00:39:30,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:39:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-06 00:39:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 330. [2021-06-06 00:39:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3951367781155017) internal successors, (788), 329 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 788 transitions. [2021-06-06 00:39:30,310 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 788 transitions. Word has length 19 [2021-06-06 00:39:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:30,311 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 788 transitions. [2021-06-06 00:39:30,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 788 transitions. [2021-06-06 00:39:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:30,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:30,312 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:30,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:30,534 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash 687948011, now seen corresponding path program 26 times [2021-06-06 00:39:30,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:30,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287123404] [2021-06-06 00:39:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:30,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287123404] [2021-06-06 00:39:30,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287123404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:30,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572157153] [2021-06-06 00:39:30,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:30,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:30,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572157153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:30,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:30,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:30,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747207268] [2021-06-06 00:39:30,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:30,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:30,797 INFO L87 Difference]: Start difference. First operand 330 states and 788 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:31,232 INFO L93 Difference]: Finished difference Result 456 states and 1025 transitions. [2021-06-06 00:39:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:39:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:31,234 INFO L225 Difference]: With dead ends: 456 [2021-06-06 00:39:31,234 INFO L226 Difference]: Without dead ends: 436 [2021-06-06 00:39:31,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:39:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-06 00:39:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 335. [2021-06-06 00:39:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.3652694610778444) internal successors, (790), 334 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 790 transitions. [2021-06-06 00:39:31,241 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 790 transitions. Word has length 19 [2021-06-06 00:39:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:31,241 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 790 transitions. [2021-06-06 00:39:31,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 790 transitions. [2021-06-06 00:39:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:31,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:31,242 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:31,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-06 00:39:31,449 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:31,449 INFO L82 PathProgramCache]: Analyzing trace with hash -332621849, now seen corresponding path program 27 times [2021-06-06 00:39:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:31,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197644990] [2021-06-06 00:39:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:31,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197644990] [2021-06-06 00:39:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197644990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220796919] [2021-06-06 00:39:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:31,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:31,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:31,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:31,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220796919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:31,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:31,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441920532] [2021-06-06 00:39:31,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:31,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:31,724 INFO L87 Difference]: Start difference. First operand 335 states and 790 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:31,995 INFO L93 Difference]: Finished difference Result 389 states and 881 transitions. [2021-06-06 00:39:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:31,997 INFO L225 Difference]: With dead ends: 389 [2021-06-06 00:39:31,997 INFO L226 Difference]: Without dead ends: 370 [2021-06-06 00:39:31,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-06 00:39:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-06 00:39:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3717105263157894) internal successors, (721), 304 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 721 transitions. [2021-06-06 00:39:32,001 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 721 transitions. Word has length 19 [2021-06-06 00:39:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:32,001 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 721 transitions. [2021-06-06 00:39:32,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 721 transitions. [2021-06-06 00:39:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:32,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:32,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:32,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:32,217 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1873029991, now seen corresponding path program 28 times [2021-06-06 00:39:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:32,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932875595] [2021-06-06 00:39:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932875595] [2021-06-06 00:39:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932875595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418085876] [2021-06-06 00:39:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:32,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:32,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418085876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:32,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:32,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:32,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180637875] [2021-06-06 00:39:32,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:32,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:32,486 INFO L87 Difference]: Start difference. First operand 305 states and 721 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:32,749 INFO L93 Difference]: Finished difference Result 348 states and 785 transitions. [2021-06-06 00:39:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:32,751 INFO L225 Difference]: With dead ends: 348 [2021-06-06 00:39:32,751 INFO L226 Difference]: Without dead ends: 333 [2021-06-06 00:39:32,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-06 00:39:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2021-06-06 00:39:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.36) internal successors, (708), 300 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 708 transitions. [2021-06-06 00:39:32,756 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 708 transitions. Word has length 19 [2021-06-06 00:39:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:32,756 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 708 transitions. [2021-06-06 00:39:32,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 708 transitions. [2021-06-06 00:39:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:32,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:32,757 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:32,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-06 00:39:32,973 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 264714809, now seen corresponding path program 29 times [2021-06-06 00:39:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:32,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380628689] [2021-06-06 00:39:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:33,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380628689] [2021-06-06 00:39:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380628689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165449505] [2021-06-06 00:39:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:33,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165449505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:33,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486673880] [2021-06-06 00:39:33,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:33,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:33,256 INFO L87 Difference]: Start difference. First operand 301 states and 708 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:33,639 INFO L93 Difference]: Finished difference Result 332 states and 757 transitions. [2021-06-06 00:39:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:39:33,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:33,640 INFO L225 Difference]: With dead ends: 332 [2021-06-06 00:39:33,640 INFO L226 Difference]: Without dead ends: 318 [2021-06-06 00:39:33,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:39:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-06 00:39:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2021-06-06 00:39:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.3488372093023258) internal successors, (707), 301 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 707 transitions. [2021-06-06 00:39:33,645 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 707 transitions. Word has length 19 [2021-06-06 00:39:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:33,645 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 707 transitions. [2021-06-06 00:39:33,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 707 transitions. [2021-06-06 00:39:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:33,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:33,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:33,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:39:33,869 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1254323989, now seen corresponding path program 30 times [2021-06-06 00:39:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:33,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925742063] [2021-06-06 00:39:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:33,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:33,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925742063] [2021-06-06 00:39:33,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925742063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:33,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674604995] [2021-06-06 00:39:33,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:33,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:33,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:34,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674604995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:34,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:39:34,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698825617] [2021-06-06 00:39:34,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:34,121 INFO L87 Difference]: Start difference. First operand 302 states and 707 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:34,318 INFO L93 Difference]: Finished difference Result 335 states and 755 transitions. [2021-06-06 00:39:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:34,320 INFO L225 Difference]: With dead ends: 335 [2021-06-06 00:39:34,320 INFO L226 Difference]: Without dead ends: 317 [2021-06-06 00:39:34,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:39:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-06 00:39:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2021-06-06 00:39:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.321070234113712) internal successors, (694), 299 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 694 transitions. [2021-06-06 00:39:34,325 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 694 transitions. Word has length 19 [2021-06-06 00:39:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:34,325 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 694 transitions. [2021-06-06 00:39:34,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 694 transitions. [2021-06-06 00:39:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:34,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:34,326 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:34,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:34,549 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1786837659, now seen corresponding path program 31 times [2021-06-06 00:39:34,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:34,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492934757] [2021-06-06 00:39:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:34,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:34,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492934757] [2021-06-06 00:39:34,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492934757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230765445] [2021-06-06 00:39:34,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230765445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:34,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:34,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:34,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342081555] [2021-06-06 00:39:34,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:34,818 INFO L87 Difference]: Start difference. First operand 300 states and 694 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:35,206 INFO L93 Difference]: Finished difference Result 452 states and 1035 transitions. [2021-06-06 00:39:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:39:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:35,208 INFO L225 Difference]: With dead ends: 452 [2021-06-06 00:39:35,208 INFO L226 Difference]: Without dead ends: 434 [2021-06-06 00:39:35,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:39:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-06 00:39:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 342. [2021-06-06 00:39:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.3870967741935485) internal successors, (814), 341 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 814 transitions. [2021-06-06 00:39:35,213 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 814 transitions. Word has length 19 [2021-06-06 00:39:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:35,213 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 814 transitions. [2021-06-06 00:39:35,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 814 transitions. [2021-06-06 00:39:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:35,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:35,214 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:35,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-06 00:39:35,433 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1586221843, now seen corresponding path program 32 times [2021-06-06 00:39:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:35,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450901370] [2021-06-06 00:39:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:35,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450901370] [2021-06-06 00:39:35,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450901370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553671044] [2021-06-06 00:39:35,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:35,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553671044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:35,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:35,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907022198] [2021-06-06 00:39:35,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:35,727 INFO L87 Difference]: Start difference. First operand 342 states and 814 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:36,166 INFO L93 Difference]: Finished difference Result 461 states and 1071 transitions. [2021-06-06 00:39:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:39:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:36,168 INFO L225 Difference]: With dead ends: 461 [2021-06-06 00:39:36,168 INFO L226 Difference]: Without dead ends: 447 [2021-06-06 00:39:36,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:39:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-06 00:39:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-06 00:39:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-06 00:39:36,173 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-06 00:39:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:36,174 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-06 00:39:36,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-06 00:39:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:36,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:36,175 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:36,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:36,389 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1657537633, now seen corresponding path program 33 times [2021-06-06 00:39:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:36,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484270660] [2021-06-06 00:39:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:36,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484270660] [2021-06-06 00:39:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484270660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146424269] [2021-06-06 00:39:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:36,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:36,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146424269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:36,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:36,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247715683] [2021-06-06 00:39:36,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:36,693 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:36,934 INFO L93 Difference]: Finished difference Result 411 states and 955 transitions. [2021-06-06 00:39:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:39:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:36,936 INFO L225 Difference]: With dead ends: 411 [2021-06-06 00:39:36,936 INFO L226 Difference]: Without dead ends: 389 [2021-06-06 00:39:36,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:39:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-06 00:39:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-06-06 00:39:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.398876404494382) internal successors, (854), 356 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 854 transitions. [2021-06-06 00:39:36,940 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 854 transitions. Word has length 19 [2021-06-06 00:39:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:36,940 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 854 transitions. [2021-06-06 00:39:36,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 854 transitions. [2021-06-06 00:39:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:36,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:36,941 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:37,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:39:37,157 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1886028755, now seen corresponding path program 34 times [2021-06-06 00:39:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:37,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398999303] [2021-06-06 00:39:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:37,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398999303] [2021-06-06 00:39:37,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398999303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855108757] [2021-06-06 00:39:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:37,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:37,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855108757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:37,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:37,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009229258] [2021-06-06 00:39:37,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:37,448 INFO L87 Difference]: Start difference. First operand 357 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:37,726 INFO L93 Difference]: Finished difference Result 410 states and 952 transitions. [2021-06-06 00:39:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:39:37,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:37,727 INFO L225 Difference]: With dead ends: 410 [2021-06-06 00:39:37,727 INFO L226 Difference]: Without dead ends: 394 [2021-06-06 00:39:37,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:39:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-06 00:39:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 359. [2021-06-06 00:39:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.393854748603352) internal successors, (857), 358 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 857 transitions. [2021-06-06 00:39:37,732 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 857 transitions. Word has length 19 [2021-06-06 00:39:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:37,732 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 857 transitions. [2021-06-06 00:39:37,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 857 transitions. [2021-06-06 00:39:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:37,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:37,734 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:37,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:39:37,949 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1752716457, now seen corresponding path program 35 times [2021-06-06 00:39:37,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:37,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043054312] [2021-06-06 00:39:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043054312] [2021-06-06 00:39:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043054312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852284023] [2021-06-06 00:39:38,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:38,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:39:38,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852284023] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:38,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:38,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174472526] [2021-06-06 00:39:38,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:38,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:38,198 INFO L87 Difference]: Start difference. First operand 359 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:38,263 INFO L93 Difference]: Finished difference Result 398 states and 924 transitions. [2021-06-06 00:39:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:38,264 INFO L225 Difference]: With dead ends: 398 [2021-06-06 00:39:38,264 INFO L226 Difference]: Without dead ends: 386 [2021-06-06 00:39:38,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-06 00:39:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 354. [2021-06-06 00:39:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-06 00:39:38,269 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-06 00:39:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:38,269 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-06 00:39:38,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-06 00:39:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:38,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:38,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:38,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:38,484 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1532889265, now seen corresponding path program 36 times [2021-06-06 00:39:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:38,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051737067] [2021-06-06 00:39:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051737067] [2021-06-06 00:39:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051737067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159520389] [2021-06-06 00:39:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:38,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:38,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:38,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159520389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:38,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:38,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931847375] [2021-06-06 00:39:38,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:38,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:38,749 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:39,400 INFO L93 Difference]: Finished difference Result 601 states and 1374 transitions. [2021-06-06 00:39:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:39:39,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:39,402 INFO L225 Difference]: With dead ends: 601 [2021-06-06 00:39:39,402 INFO L226 Difference]: Without dead ends: 568 [2021-06-06 00:39:39,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:39:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-06 00:39:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-06-06 00:39:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4005037783375314) internal successors, (953), 397 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 953 transitions. [2021-06-06 00:39:39,409 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 953 transitions. Word has length 19 [2021-06-06 00:39:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:39,409 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 953 transitions. [2021-06-06 00:39:39,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 953 transitions. [2021-06-06 00:39:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:39,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:39,411 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:39,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-06 00:39:39,625 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:39,625 INFO L82 PathProgramCache]: Analyzing trace with hash -471317365, now seen corresponding path program 37 times [2021-06-06 00:39:39,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:39,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812334165] [2021-06-06 00:39:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:39,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:39,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812334165] [2021-06-06 00:39:39,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812334165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:39,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905481462] [2021-06-06 00:39:39,709 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905481462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:39,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:39,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:39,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607168084] [2021-06-06 00:39:39,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:39,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:39,911 INFO L87 Difference]: Start difference. First operand 398 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:40,116 INFO L93 Difference]: Finished difference Result 435 states and 1013 transitions. [2021-06-06 00:39:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:39:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:40,117 INFO L225 Difference]: With dead ends: 435 [2021-06-06 00:39:40,117 INFO L226 Difference]: Without dead ends: 416 [2021-06-06 00:39:40,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:39:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-06 00:39:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 398. [2021-06-06 00:39:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.395465994962217) internal successors, (951), 397 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 951 transitions. [2021-06-06 00:39:40,124 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 951 transitions. Word has length 19 [2021-06-06 00:39:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:40,124 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 951 transitions. [2021-06-06 00:39:40,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 951 transitions. [2021-06-06 00:39:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:40,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:40,125 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:40,345 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1274029861, now seen corresponding path program 38 times [2021-06-06 00:39:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:40,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789457130] [2021-06-06 00:39:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:40,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789457130] [2021-06-06 00:39:40,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789457130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085106866] [2021-06-06 00:39:40,459 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:40,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:40,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:40,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:40,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085106866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:40,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:40,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919908102] [2021-06-06 00:39:40,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:40,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:40,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:40,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:40,675 INFO L87 Difference]: Start difference. First operand 398 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:41,073 INFO L93 Difference]: Finished difference Result 532 states and 1221 transitions. [2021-06-06 00:39:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:39:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:41,075 INFO L225 Difference]: With dead ends: 532 [2021-06-06 00:39:41,075 INFO L226 Difference]: Without dead ends: 521 [2021-06-06 00:39:41,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:39:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-06 00:39:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-06 00:39:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.3914141414141414) internal successors, (947), 396 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 947 transitions. [2021-06-06 00:39:41,080 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 947 transitions. Word has length 19 [2021-06-06 00:39:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:41,081 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 947 transitions. [2021-06-06 00:39:41,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 947 transitions. [2021-06-06 00:39:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:41,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:41,082 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-06 00:39:41,289 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1464333983, now seen corresponding path program 39 times [2021-06-06 00:39:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:41,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696925927] [2021-06-06 00:39:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:41,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696925927] [2021-06-06 00:39:41,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696925927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562271667] [2021-06-06 00:39:41,371 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:41,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:41,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562271667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:41,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:41,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530436779] [2021-06-06 00:39:41,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:41,552 INFO L87 Difference]: Start difference. First operand 397 states and 947 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:41,975 INFO L93 Difference]: Finished difference Result 528 states and 1212 transitions. [2021-06-06 00:39:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:39:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:41,976 INFO L225 Difference]: With dead ends: 528 [2021-06-06 00:39:41,976 INFO L226 Difference]: Without dead ends: 519 [2021-06-06 00:39:41,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:39:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-06 00:39:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-06-06 00:39:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.385) internal successors, (954), 400 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 954 transitions. [2021-06-06 00:39:41,981 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 954 transitions. Word has length 19 [2021-06-06 00:39:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:41,981 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 954 transitions. [2021-06-06 00:39:41,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 954 transitions. [2021-06-06 00:39:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:41,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:41,982 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:42,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:42,182 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:42,182 INFO L82 PathProgramCache]: Analyzing trace with hash 389426617, now seen corresponding path program 40 times [2021-06-06 00:39:42,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:42,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503114136] [2021-06-06 00:39:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:42,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:42,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503114136] [2021-06-06 00:39:42,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503114136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900316405] [2021-06-06 00:39:42,277 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:42,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:42,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900316405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:42,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:42,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:42,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793500065] [2021-06-06 00:39:42,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:42,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:42,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:42,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:42,437 INFO L87 Difference]: Start difference. First operand 401 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:42,791 INFO L93 Difference]: Finished difference Result 457 states and 1041 transitions. [2021-06-06 00:39:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:39:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:42,793 INFO L225 Difference]: With dead ends: 457 [2021-06-06 00:39:42,793 INFO L226 Difference]: Without dead ends: 440 [2021-06-06 00:39:42,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:39:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-06 00:39:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-06-06 00:39:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.374064837905237) internal successors, (952), 401 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 952 transitions. [2021-06-06 00:39:42,798 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 952 transitions. Word has length 19 [2021-06-06 00:39:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:42,798 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 952 transitions. [2021-06-06 00:39:42,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 952 transitions. [2021-06-06 00:39:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:42,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:42,799 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:43,013 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1430558513, now seen corresponding path program 41 times [2021-06-06 00:39:43,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:43,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572673137] [2021-06-06 00:39:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:43,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:43,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572673137] [2021-06-06 00:39:43,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572673137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:43,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892914495] [2021-06-06 00:39:43,110 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:43,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:39:43,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:43,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892914495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:43,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:43,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698867577] [2021-06-06 00:39:43,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:43,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:43,305 INFO L87 Difference]: Start difference. First operand 402 states and 952 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:43,562 INFO L93 Difference]: Finished difference Result 474 states and 1095 transitions. [2021-06-06 00:39:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 19 [2021-06-06 00:39:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:43,563 INFO L225 Difference]: With dead ends: 474 [2021-06-06 00:39:43,563 INFO L226 Difference]: Without dead ends: 457 [2021-06-06 00:39:43,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:39:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-06 00:39:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 395. [2021-06-06 00:39:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.3756345177664975) internal successors, (936), 394 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 936 transitions. [2021-06-06 00:39:43,569 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 936 transitions. Word has length 19 [2021-06-06 00:39:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:43,569 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 936 transitions. [2021-06-06 00:39:43,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 936 transitions. [2021-06-06 00:39:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:43,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:43,569 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:43,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-06 00:39:43,770 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash 11172077, now seen corresponding path program 42 times [2021-06-06 00:39:43,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:43,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222742686] [2021-06-06 00:39:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:43,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:43,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222742686] [2021-06-06 00:39:43,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222742686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:43,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637210879] [2021-06-06 00:39:43,848 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:43,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:43,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:44,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637210879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:44,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:44,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:44,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698728543] [2021-06-06 00:39:44,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:44,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:44,051 INFO L87 Difference]: Start difference. First operand 395 states and 936 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:44,283 INFO L93 Difference]: Finished difference Result 505 states and 1159 transitions. [2021-06-06 00:39:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:44,284 INFO L225 Difference]: With dead ends: 505 [2021-06-06 00:39:44,284 INFO L226 Difference]: Without dead ends: 492 [2021-06-06 00:39:44,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-06 00:39:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 414. [2021-06-06 00:39:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.375302663438257) internal successors, (981), 413 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 981 transitions. [2021-06-06 00:39:44,289 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 981 transitions. Word has length 19 [2021-06-06 00:39:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:44,290 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 981 transitions. [2021-06-06 00:39:44,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 981 transitions. [2021-06-06 00:39:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:44,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:44,291 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:44,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:44,498 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:44,499 INFO L82 PathProgramCache]: Analyzing trace with hash 735553785, now seen corresponding path program 43 times [2021-06-06 00:39:44,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:44,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948651633] [2021-06-06 00:39:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:44,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:44,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948651633] [2021-06-06 00:39:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948651633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:44,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788066938] [2021-06-06 00:39:44,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:44,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788066938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:44,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:44,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279530724] [2021-06-06 00:39:44,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:44,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:44,755 INFO L87 Difference]: Start difference. First operand 414 states and 981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:44,972 INFO L93 Difference]: Finished difference Result 489 states and 1127 transitions. [2021-06-06 00:39:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:44,973 INFO L225 Difference]: With dead ends: 489 [2021-06-06 00:39:44,973 INFO L226 Difference]: Without dead ends: 469 [2021-06-06 00:39:44,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:39:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-06 00:39:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2021-06-06 00:39:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.3755760368663594) internal successors, (1031), 434 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1031 transitions. [2021-06-06 00:39:44,978 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1031 transitions. Word has length 19 [2021-06-06 00:39:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:44,978 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1031 transitions. [2021-06-06 00:39:44,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1031 transitions. [2021-06-06 00:39:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:44,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:44,978 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:45,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:39:45,179 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 589063373, now seen corresponding path program 44 times [2021-06-06 00:39:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:45,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086630574] [2021-06-06 00:39:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:45,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:45,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086630574] [2021-06-06 00:39:45,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086630574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:45,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360006707] [2021-06-06 00:39:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:45,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:45,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360006707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:45,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:45,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185390781] [2021-06-06 00:39:45,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:45,450 INFO L87 Difference]: Start difference. First operand 435 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:45,720 INFO L93 Difference]: Finished difference Result 623 states and 1481 transitions. [2021-06-06 00:39:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:39:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:45,722 INFO L225 Difference]: With dead ends: 623 [2021-06-06 00:39:45,722 INFO L226 Difference]: Without dead ends: 609 [2021-06-06 00:39:45,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-06 00:39:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 521. [2021-06-06 00:39:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.4288461538461537) internal successors, (1263), 520 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1263 transitions. [2021-06-06 00:39:45,728 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1263 transitions. Word has length 19 [2021-06-06 00:39:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:45,728 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1263 transitions. [2021-06-06 00:39:45,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1263 transitions. [2021-06-06 00:39:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:45,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:45,729 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:45,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:45,933 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -737202913, now seen corresponding path program 45 times [2021-06-06 00:39:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:45,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358600123] [2021-06-06 00:39:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:46,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358600123] [2021-06-06 00:39:46,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358600123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052477481] [2021-06-06 00:39:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:46,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052477481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987709691] [2021-06-06 00:39:46,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:46,200 INFO L87 Difference]: Start difference. First operand 521 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:46,486 INFO L93 Difference]: Finished difference Result 570 states and 1340 transitions. [2021-06-06 00:39:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:39:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:46,487 INFO L225 Difference]: With dead ends: 570 [2021-06-06 00:39:46,487 INFO L226 Difference]: Without dead ends: 553 [2021-06-06 00:39:46,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:39:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-06 00:39:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 480. [2021-06-06 00:39:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-06-06 00:39:46,493 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 19 [2021-06-06 00:39:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:46,493 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-06-06 00:39:46,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-06-06 00:39:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:46,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:46,494 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:46,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-06 00:39:46,709 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash -67158711, now seen corresponding path program 46 times [2021-06-06 00:39:46,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:46,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479555617] [2021-06-06 00:39:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479555617] [2021-06-06 00:39:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479555617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138242457] [2021-06-06 00:39:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:46,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:46,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138242457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:46,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:46,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:46,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482726439] [2021-06-06 00:39:46,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:46,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:46,960 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:47,540 INFO L93 Difference]: Finished difference Result 737 states and 1672 transitions. [2021-06-06 00:39:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:39:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:47,543 INFO L225 Difference]: With dead ends: 737 [2021-06-06 00:39:47,543 INFO L226 Difference]: Without dead ends: 718 [2021-06-06 00:39:47,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:39:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-06 00:39:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 533. [2021-06-06 00:39:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.3477443609022557) internal successors, (1249), 532 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1249 transitions. [2021-06-06 00:39:47,552 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1249 transitions. Word has length 19 [2021-06-06 00:39:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:47,552 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1249 transitions. [2021-06-06 00:39:47,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1249 transitions. [2021-06-06 00:39:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:47,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:47,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:47,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-06 00:39:47,757 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash 338508243, now seen corresponding path program 47 times [2021-06-06 00:39:47,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:47,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095614873] [2021-06-06 00:39:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:47,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:47,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095614873] [2021-06-06 00:39:47,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095614873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:47,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651351564] [2021-06-06 00:39:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:47,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651351564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:48,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:48,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493984437] [2021-06-06 00:39:48,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:48,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:48,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:48,013 INFO L87 Difference]: Start difference. First operand 533 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:48,146 INFO L93 Difference]: Finished difference Result 675 states and 1555 transitions. [2021-06-06 00:39:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:48,149 INFO L225 Difference]: With dead ends: 675 [2021-06-06 00:39:48,149 INFO L226 Difference]: Without dead ends: 660 [2021-06-06 00:39:48,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:39:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-06 00:39:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 390. [2021-06-06 00:39:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3059125964010283) internal successors, (897), 389 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 897 transitions. [2021-06-06 00:39:48,155 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 897 transitions. Word has length 19 [2021-06-06 00:39:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:48,155 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 897 transitions. [2021-06-06 00:39:48,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 897 transitions. [2021-06-06 00:39:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:48,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:48,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:48,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:48,361 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1596297767, now seen corresponding path program 48 times [2021-06-06 00:39:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306858657] [2021-06-06 00:39:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:48,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:48,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306858657] [2021-06-06 00:39:48,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306858657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:48,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586639168] [2021-06-06 00:39:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:48,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:48,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:48,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:48,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:48,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586639168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:48,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:48,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:48,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988239965] [2021-06-06 00:39:48,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:48,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:48,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:48,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:48,653 INFO L87 Difference]: Start difference. First operand 390 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:49,287 INFO L93 Difference]: Finished difference Result 552 states and 1225 transitions. [2021-06-06 00:39:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:39:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:49,289 INFO L225 Difference]: With dead ends: 552 [2021-06-06 00:39:49,289 INFO L226 Difference]: Without dead ends: 531 [2021-06-06 00:39:49,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:39:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-06 00:39:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 431. [2021-06-06 00:39:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3232558139534882) internal successors, (999), 430 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 999 transitions. [2021-06-06 00:39:49,296 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 999 transitions. Word has length 19 [2021-06-06 00:39:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:49,296 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 999 transitions. [2021-06-06 00:39:49,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 999 transitions. [2021-06-06 00:39:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:49,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:49,297 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:49,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-06 00:39:49,497 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:49,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1320337189, now seen corresponding path program 49 times [2021-06-06 00:39:49,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:49,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499178722] [2021-06-06 00:39:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:49,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:49,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499178722] [2021-06-06 00:39:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499178722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:49,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190541339] [2021-06-06 00:39:49,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:49,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190541339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:49,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:49,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:49,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575232630] [2021-06-06 00:39:49,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:49,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:49,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:49,772 INFO L87 Difference]: Start difference. First operand 431 states and 999 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:49,986 INFO L93 Difference]: Finished difference Result 490 states and 1117 transitions. [2021-06-06 00:39:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:39:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:49,988 INFO L225 Difference]: With dead ends: 490 [2021-06-06 00:39:49,989 INFO L226 Difference]: Without dead ends: 476 [2021-06-06 00:39:49,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-06 00:39:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-06 00:39:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.278481012658228) internal successors, (900), 395 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 900 transitions. [2021-06-06 00:39:49,994 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 900 transitions. Word has length 19 [2021-06-06 00:39:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:49,994 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 900 transitions. [2021-06-06 00:39:49,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 900 transitions. [2021-06-06 00:39:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:49,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:49,995 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:50,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:50,196 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1648363821, now seen corresponding path program 50 times [2021-06-06 00:39:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459799797] [2021-06-06 00:39:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:50,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:50,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459799797] [2021-06-06 00:39:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459799797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:50,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788023033] [2021-06-06 00:39:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:50,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:50,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788023033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:50,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:50,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:50,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971794250] [2021-06-06 00:39:50,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:50,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:50,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:50,469 INFO L87 Difference]: Start difference. First operand 396 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:50,744 INFO L93 Difference]: Finished difference Result 448 states and 1001 transitions. [2021-06-06 00:39:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:39:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:50,745 INFO L225 Difference]: With dead ends: 448 [2021-06-06 00:39:50,745 INFO L226 Difference]: Without dead ends: 434 [2021-06-06 00:39:50,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:39:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-06 00:39:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-06 00:39:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.197986577181208) internal successors, (655), 298 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 655 transitions. [2021-06-06 00:39:50,750 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 655 transitions. Word has length 19 [2021-06-06 00:39:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:50,750 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 655 transitions. [2021-06-06 00:39:50,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 655 transitions. [2021-06-06 00:39:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:50,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:50,751 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:50,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:50,957 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1976559273, now seen corresponding path program 51 times [2021-06-06 00:39:50,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:50,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649186710] [2021-06-06 00:39:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649186710] [2021-06-06 00:39:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649186710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525448392] [2021-06-06 00:39:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:51,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525448392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:51,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374110375] [2021-06-06 00:39:51,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:51,235 INFO L87 Difference]: Start difference. First operand 299 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:51,464 INFO L93 Difference]: Finished difference Result 337 states and 722 transitions. [2021-06-06 00:39:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:51,465 INFO L225 Difference]: With dead ends: 337 [2021-06-06 00:39:51,465 INFO L226 Difference]: Without dead ends: 326 [2021-06-06 00:39:51,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-06 00:39:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2021-06-06 00:39:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.195945945945946) internal successors, (650), 296 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 650 transitions. [2021-06-06 00:39:51,469 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 650 transitions. Word has length 19 [2021-06-06 00:39:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:51,469 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 650 transitions. [2021-06-06 00:39:51,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 650 transitions. [2021-06-06 00:39:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:51,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:51,470 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:51,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:51,685 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -900848117, now seen corresponding path program 52 times [2021-06-06 00:39:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:51,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250923331] [2021-06-06 00:39:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:51,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250923331] [2021-06-06 00:39:51,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250923331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151011654] [2021-06-06 00:39:51,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:51,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:39:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151011654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994728757] [2021-06-06 00:39:51,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:51,942 INFO L87 Difference]: Start difference. First operand 297 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:52,864 INFO L93 Difference]: Finished difference Result 546 states and 1150 transitions. [2021-06-06 00:39:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:39:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:52,865 INFO L225 Difference]: With dead ends: 546 [2021-06-06 00:39:52,865 INFO L226 Difference]: Without dead ends: 527 [2021-06-06 00:39:52,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:39:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-06 00:39:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 330. [2021-06-06 00:39:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2036474164133737) internal successors, (725), 329 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 725 transitions. [2021-06-06 00:39:52,870 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 725 transitions. Word has length 19 [2021-06-06 00:39:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:52,870 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 725 transitions. [2021-06-06 00:39:52,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 725 transitions. [2021-06-06 00:39:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:52,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:52,870 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:53,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:53,071 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -258765289, now seen corresponding path program 53 times [2021-06-06 00:39:53,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:53,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199924571] [2021-06-06 00:39:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:53,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:53,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199924571] [2021-06-06 00:39:53,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199924571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:53,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645853109] [2021-06-06 00:39:53,163 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:53,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:53,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:53,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645853109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:53,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:53,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:53,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198363736] [2021-06-06 00:39:53,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:53,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:53,339 INFO L87 Difference]: Start difference. First operand 330 states and 725 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:53,535 INFO L93 Difference]: Finished difference Result 370 states and 790 transitions. [2021-06-06 00:39:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:53,535 INFO L225 Difference]: With dead ends: 370 [2021-06-06 00:39:53,536 INFO L226 Difference]: Without dead ends: 349 [2021-06-06 00:39:53,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:39:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-06 00:39:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 301. [2021-06-06 00:39:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.183333333333333) internal successors, (655), 300 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 655 transitions. [2021-06-06 00:39:53,539 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 655 transitions. Word has length 19 [2021-06-06 00:39:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 655 transitions. [2021-06-06 00:39:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 655 transitions. [2021-06-06 00:39:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:53,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:53,540 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:53,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:53,740 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -385810339, now seen corresponding path program 54 times [2021-06-06 00:39:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117623170] [2021-06-06 00:39:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:53,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:53,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117623170] [2021-06-06 00:39:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117623170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:53,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172689786] [2021-06-06 00:39:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:53,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:39:53,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:54,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172689786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:54,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:54,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:54,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592585336] [2021-06-06 00:39:54,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:54,032 INFO L87 Difference]: Start difference. First operand 301 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:54,279 INFO L93 Difference]: Finished difference Result 354 states and 743 transitions. [2021-06-06 00:39:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:39:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:54,280 INFO L225 Difference]: With dead ends: 354 [2021-06-06 00:39:54,280 INFO L226 Difference]: Without dead ends: 340 [2021-06-06 00:39:54,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:39:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-06 00:39:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2021-06-06 00:39:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.1824324324324325) internal successors, (646), 296 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 646 transitions. [2021-06-06 00:39:54,284 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 646 transitions. Word has length 19 [2021-06-06 00:39:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:54,284 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 646 transitions. [2021-06-06 00:39:54,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 646 transitions. [2021-06-06 00:39:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:54,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:54,285 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:54,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:54,485 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 529271149, now seen corresponding path program 55 times [2021-06-06 00:39:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:54,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677281017] [2021-06-06 00:39:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:54,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:54,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677281017] [2021-06-06 00:39:54,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677281017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:54,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368043119] [2021-06-06 00:39:54,574 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368043119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:54,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:54,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322193847] [2021-06-06 00:39:54,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:54,757 INFO L87 Difference]: Start difference. First operand 297 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:54,936 INFO L93 Difference]: Finished difference Result 323 states and 685 transitions. [2021-06-06 00:39:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 19 [2021-06-06 00:39:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:54,937 INFO L225 Difference]: With dead ends: 323 [2021-06-06 00:39:54,937 INFO L226 Difference]: Without dead ends: 309 [2021-06-06 00:39:54,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:39:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-06 00:39:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-06-06 00:39:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1824817518248176) internal successors, (598), 274 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 598 transitions. [2021-06-06 00:39:54,940 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 598 transitions. Word has length 19 [2021-06-06 00:39:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:54,940 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 598 transitions. [2021-06-06 00:39:54,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 598 transitions. [2021-06-06 00:39:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:54,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:54,941 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:55,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-06 00:39:55,141 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1199315351, now seen corresponding path program 56 times [2021-06-06 00:39:55,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:55,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579596736] [2021-06-06 00:39:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:55,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:55,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579596736] [2021-06-06 00:39:55,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579596736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:55,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152520080] [2021-06-06 00:39:55,236 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:55,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152520080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:55,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:55,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:55,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063560309] [2021-06-06 00:39:55,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:55,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:55,461 INFO L87 Difference]: Start difference. First operand 275 states and 598 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:55,643 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2021-06-06 00:39:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:55,644 INFO L225 Difference]: With dead ends: 299 [2021-06-06 00:39:55,644 INFO L226 Difference]: Without dead ends: 289 [2021-06-06 00:39:55,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:39:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-06 00:39:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2021-06-06 00:39:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1846153846153844) internal successors, (568), 260 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 568 transitions. [2021-06-06 00:39:55,646 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 568 transitions. Word has length 19 [2021-06-06 00:39:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:55,647 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 568 transitions. [2021-06-06 00:39:55,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 568 transitions. [2021-06-06 00:39:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:55,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:55,647 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:55,861 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1432999257, now seen corresponding path program 57 times [2021-06-06 00:39:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791638845] [2021-06-06 00:39:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:55,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791638845] [2021-06-06 00:39:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791638845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031199926] [2021-06-06 00:39:55,948 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:39:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:56,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031199926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:56,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:56,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:39:56,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569203990] [2021-06-06 00:39:56,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:39:56,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:56,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:39:56,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:39:56,151 INFO L87 Difference]: Start difference. First operand 261 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:56,335 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-06 00:39:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:56,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 19 [2021-06-06 00:39:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:56,336 INFO L225 Difference]: With dead ends: 282 [2021-06-06 00:39:56,336 INFO L226 Difference]: Without dead ends: 273 [2021-06-06 00:39:56,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:39:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-06 00:39:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-06-06 00:39:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-06 00:39:56,340 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-06 00:39:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:56,340 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-06 00:39:56,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2021-06-06 00:39:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-06 00:39:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:56,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:56,341 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:56,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-06 00:39:56,557 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash -265385941, now seen corresponding path program 58 times [2021-06-06 00:39:56,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:56,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701334285] [2021-06-06 00:39:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:56,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:56,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701334285] [2021-06-06 00:39:56,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701334285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:56,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054141666] [2021-06-06 00:39:56,644 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:56,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:39:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:39:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:56,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054141666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:56,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:56,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:39:56,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833384155] [2021-06-06 00:39:56,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:39:56,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:39:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:56,810 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:57,214 INFO L93 Difference]: Finished difference Result 319 states and 675 transitions. [2021-06-06 00:39:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:39:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 19 [2021-06-06 00:39:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:57,215 INFO L225 Difference]: With dead ends: 319 [2021-06-06 00:39:57,215 INFO L226 Difference]: Without dead ends: 304 [2021-06-06 00:39:57,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:39:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-06 00:39:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-06 00:39:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-06 00:39:57,217 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-06 00:39:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:57,217 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-06 00:39:57,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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) [2021-06-06 00:39:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-06 00:39:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:39:57,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:57,218 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:57,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:57,418 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1815085655, now seen corresponding path program 59 times [2021-06-06 00:39:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:57,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700298619] [2021-06-06 00:39:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:57,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700298619] [2021-06-06 00:39:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700298619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153424578] [2021-06-06 00:39:57,513 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:57,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:57,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:57,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153424578] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:39:57,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:39:57,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-06 00:39:57,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716469394] [2021-06-06 00:39:57,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:39:57,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:57,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:39:57,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:57,669 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:57,715 INFO L93 Difference]: Finished difference Result 264 states and 566 transitions. [2021-06-06 00:39:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:39:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2021-06-06 00:39:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:57,716 INFO L225 Difference]: With dead ends: 264 [2021-06-06 00:39:57,716 INFO L226 Difference]: Without dead ends: 198 [2021-06-06 00:39:57,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:39:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-06 00:39:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2021-06-06 00:39:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6764705882352942) internal successors, (285), 170 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 285 transitions. [2021-06-06 00:39:57,718 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 285 transitions. Word has length 19 [2021-06-06 00:39:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:57,718 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 285 transitions. [2021-06-06 00:39:57,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-06-06 00:39:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 285 transitions. [2021-06-06 00:39:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:57,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:57,718 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:57,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:57,919 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -477505781, now seen corresponding path program 60 times [2021-06-06 00:39:57,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:57,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493628025] [2021-06-06 00:39:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:57,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493628025] [2021-06-06 00:39:57,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493628025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354373936] [2021-06-06 00:39:57,952 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:57,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:39:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:39:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:58,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354373936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:58,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:39:58,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306884133] [2021-06-06 00:39:58,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:39:58,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:58,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:39:58,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:39:58,015 INFO L87 Difference]: Start difference. First operand 171 states and 285 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:58,088 INFO L93 Difference]: Finished difference Result 213 states and 345 transitions. [2021-06-06 00:39:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:39:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:39:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:58,089 INFO L225 Difference]: With dead ends: 213 [2021-06-06 00:39:58,089 INFO L226 Difference]: Without dead ends: 213 [2021-06-06 00:39:58,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-06 00:39:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-06 00:39:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-06 00:39:58,091 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 21 [2021-06-06 00:39:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:58,091 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-06 00:39:58,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-06 00:39:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:58,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:58,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:58,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:58,292 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1317377295, now seen corresponding path program 61 times [2021-06-06 00:39:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:58,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444686667] [2021-06-06 00:39:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:58,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:58,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444686667] [2021-06-06 00:39:58,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444686667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396418804] [2021-06-06 00:39:58,309 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:39:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:58,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396418804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:58,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:39:58,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800349018] [2021-06-06 00:39:58,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:39:58,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:39:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:39:58,355 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:58,435 INFO L93 Difference]: Finished difference Result 199 states and 319 transitions. [2021-06-06 00:39:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:39:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:39:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:58,435 INFO L225 Difference]: With dead ends: 199 [2021-06-06 00:39:58,435 INFO L226 Difference]: Without dead ends: 184 [2021-06-06 00:39:58,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:39:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-06 00:39:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2021-06-06 00:39:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-06 00:39:58,437 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-06 00:39:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:58,437 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-06 00:39:58,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-06 00:39:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:58,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:58,438 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:58,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:58,638 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:58,639 INFO L82 PathProgramCache]: Analyzing trace with hash -25018099, now seen corresponding path program 62 times [2021-06-06 00:39:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:58,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67414433] [2021-06-06 00:39:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:58,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67414433] [2021-06-06 00:39:58,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67414433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602535813] [2021-06-06 00:39:58,665 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:39:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:39:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:58,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602535813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:58,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:58,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-06 00:39:58,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578045411] [2021-06-06 00:39:58,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:39:58,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:58,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:39:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:39:58,846 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:39:59,101 INFO L93 Difference]: Finished difference Result 190 states and 305 transitions. [2021-06-06 00:39:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:39:59,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 21 [2021-06-06 00:39:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:39:59,102 INFO L225 Difference]: With dead ends: 190 [2021-06-06 00:39:59,102 INFO L226 Difference]: Without dead ends: 186 [2021-06-06 00:39:59,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:39:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-06 00:39:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-06 00:39:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-06 00:39:59,103 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-06 00:39:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:39:59,104 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-06 00:39:59,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:39:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-06 00:39:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:39:59,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:39:59,104 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:39:59,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-06 00:39:59,305 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:39:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:39:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -856436821, now seen corresponding path program 63 times [2021-06-06 00:39:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:39:59,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251244567] [2021-06-06 00:39:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:39:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:39:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:39:59,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:39:59,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251244567] [2021-06-06 00:39:59,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251244567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:59,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005849759] [2021-06-06 00:39:59,331 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:39:59,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:39:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:39:59,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:39:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:39:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:39:59,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005849759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:39:59,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:39:59,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-06 00:39:59,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310892440] [2021-06-06 00:39:59,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:39:59,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:39:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:39:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:39:59,489 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:00,032 INFO L93 Difference]: Finished difference Result 203 states and 330 transitions. [2021-06-06 00:40:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:40:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:40:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:00,033 INFO L225 Difference]: With dead ends: 203 [2021-06-06 00:40:00,033 INFO L226 Difference]: Without dead ends: 187 [2021-06-06 00:40:00,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:40:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-06 00:40:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-06-06 00:40:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6875) internal successors, (243), 144 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2021-06-06 00:40:00,036 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 21 [2021-06-06 00:40:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:00,036 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2021-06-06 00:40:00,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2021-06-06 00:40:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:00,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:00,036 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:00,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:00,253 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1784149655, now seen corresponding path program 64 times [2021-06-06 00:40:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:00,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983378521] [2021-06-06 00:40:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:00,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983378521] [2021-06-06 00:40:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983378521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604088555] [2021-06-06 00:40:00,352 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:00,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:40:00,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:40:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604088555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:00,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:00,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:40:00,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103303453] [2021-06-06 00:40:00,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:40:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:40:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:00,572 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:00,980 INFO L93 Difference]: Finished difference Result 244 states and 400 transitions. [2021-06-06 00:40:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:40:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 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 23 [2021-06-06 00:40:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:00,981 INFO L225 Difference]: With dead ends: 244 [2021-06-06 00:40:00,981 INFO L226 Difference]: Without dead ends: 218 [2021-06-06 00:40:00,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:40:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-06 00:40:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-06-06 00:40:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-06 00:40:00,983 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 23 [2021-06-06 00:40:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:00,983 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-06 00:40:00,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-06 00:40:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:00,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:00,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:01,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:01,185 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2003485607, now seen corresponding path program 65 times [2021-06-06 00:40:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:01,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992375697] [2021-06-06 00:40:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:01,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:01,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992375697] [2021-06-06 00:40:01,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992375697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:01,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919286525] [2021-06-06 00:40:01,318 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:01,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:40:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:40:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:40:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919286525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:01,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:01,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-06 00:40:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917646498] [2021-06-06 00:40:01,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:40:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:40:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:40:01,492 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:01,952 INFO L93 Difference]: Finished difference Result 206 states and 330 transitions. [2021-06-06 00:40:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:40:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:40:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:01,953 INFO L225 Difference]: With dead ends: 206 [2021-06-06 00:40:01,953 INFO L226 Difference]: Without dead ends: 193 [2021-06-06 00:40:01,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:40:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-06 00:40:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-06 00:40:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.6312056737588652) internal successors, (230), 141 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2021-06-06 00:40:01,955 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 23 [2021-06-06 00:40:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:01,955 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2021-06-06 00:40:01,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2021-06-06 00:40:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:01,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:01,956 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:02,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-06 00:40:02,161 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash 677219321, now seen corresponding path program 66 times [2021-06-06 00:40:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:02,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475730442] [2021-06-06 00:40:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:02,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475730442] [2021-06-06 00:40:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475730442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182239349] [2021-06-06 00:40:02,279 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:02,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:40:02,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:02,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:40:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:02,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182239349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:02,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:02,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:40:02,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561766643] [2021-06-06 00:40:02,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:40:02,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:40:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:40:02,539 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:02,988 INFO L93 Difference]: Finished difference Result 182 states and 286 transitions. [2021-06-06 00:40:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:40:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 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 23 [2021-06-06 00:40:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:02,989 INFO L225 Difference]: With dead ends: 182 [2021-06-06 00:40:02,989 INFO L226 Difference]: Without dead ends: 158 [2021-06-06 00:40:02,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:40:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-06 00:40:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-06-06 00:40:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 116 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 187 transitions. [2021-06-06 00:40:02,991 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 187 transitions. Word has length 23 [2021-06-06 00:40:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:02,991 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 187 transitions. [2021-06-06 00:40:02,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 187 transitions. [2021-06-06 00:40:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:02,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:02,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:03,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:03,205 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1752930477, now seen corresponding path program 67 times [2021-06-06 00:40:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:03,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171578106] [2021-06-06 00:40:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:03,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:03,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171578106] [2021-06-06 00:40:03,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171578106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:03,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547540138] [2021-06-06 00:40:03,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:40:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:03,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547540138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:03,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:03,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:40:03,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745399411] [2021-06-06 00:40:03,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:40:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:40:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:40:03,529 INFO L87 Difference]: Start difference. First operand 117 states and 187 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:04,045 INFO L93 Difference]: Finished difference Result 147 states and 230 transitions. [2021-06-06 00:40:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:40:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 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 23 [2021-06-06 00:40:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:04,045 INFO L225 Difference]: With dead ends: 147 [2021-06-06 00:40:04,045 INFO L226 Difference]: Without dead ends: 92 [2021-06-06 00:40:04,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:40:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-06 00:40:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-06-06 00:40:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2021-06-06 00:40:04,047 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 23 [2021-06-06 00:40:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:04,047 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2021-06-06 00:40:04,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2021-06-06 00:40:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:04,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:04,047 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:04,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-06 00:40:04,248 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1920453071, now seen corresponding path program 68 times [2021-06-06 00:40:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:04,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630153103] [2021-06-06 00:40:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:04,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630153103] [2021-06-06 00:40:04,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630153103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399551549] [2021-06-06 00:40:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:04,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:40:04,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:40:04,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:04,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399551549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:04,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:04,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:40:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808346752] [2021-06-06 00:40:04,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:40:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:40:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:40:04,574 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:04,901 INFO L93 Difference]: Finished difference Result 117 states and 172 transitions. [2021-06-06 00:40:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:40:04,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 23 [2021-06-06 00:40:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:04,901 INFO L225 Difference]: With dead ends: 117 [2021-06-06 00:40:04,902 INFO L226 Difference]: Without dead ends: 99 [2021-06-06 00:40:04,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:40:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-06 00:40:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-06-06 00:40:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 84 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 125 transitions. [2021-06-06 00:40:04,903 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 125 transitions. Word has length 23 [2021-06-06 00:40:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:04,903 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 125 transitions. [2021-06-06 00:40:04,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 125 transitions. [2021-06-06 00:40:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:04,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:04,904 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:05,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-06 00:40:05,109 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 827116973, now seen corresponding path program 69 times [2021-06-06 00:40:05,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:05,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208374341] [2021-06-06 00:40:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:05,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:05,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208374341] [2021-06-06 00:40:05,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208374341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:05,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687942833] [2021-06-06 00:40:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:05,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:40:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:40:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:40:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687942833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:05,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:05,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-06 00:40:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674954727] [2021-06-06 00:40:05,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:40:05,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:40:05,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:40:05,467 INFO L87 Difference]: Start difference. First operand 85 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:05,870 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-06-06 00:40:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:40:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 23 [2021-06-06 00:40:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:05,871 INFO L225 Difference]: With dead ends: 111 [2021-06-06 00:40:05,871 INFO L226 Difference]: Without dead ends: 91 [2021-06-06 00:40:05,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:40:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-06 00:40:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-06 00:40:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2021-06-06 00:40:05,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 23 [2021-06-06 00:40:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:05,872 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2021-06-06 00:40:05,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2021-06-06 00:40:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:05,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:05,872 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:06,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-06 00:40:06,073 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1790978285, now seen corresponding path program 70 times [2021-06-06 00:40:06,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:06,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221124331] [2021-06-06 00:40:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:06,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:06,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221124331] [2021-06-06 00:40:06,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221124331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:06,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585772457] [2021-06-06 00:40:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:06,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:40:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:40:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:06,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585772457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:06,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:40:06,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-06 00:40:06,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128977114] [2021-06-06 00:40:06,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:40:06,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:40:06,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:06,407 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:06,979 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-06-06 00:40:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:40:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 23 [2021-06-06 00:40:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:06,979 INFO L225 Difference]: With dead ends: 130 [2021-06-06 00:40:06,979 INFO L226 Difference]: Without dead ends: 109 [2021-06-06 00:40:06,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:40:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-06 00:40:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-06-06 00:40:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-06-06 00:40:06,980 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 23 [2021-06-06 00:40:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:06,981 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-06-06 00:40:06,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-06-06 00:40:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:40:06,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:06,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:07,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:07,197 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash -266912117, now seen corresponding path program 71 times [2021-06-06 00:40:07,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:07,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785386471] [2021-06-06 00:40:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:07,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:07,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785386471] [2021-06-06 00:40:07,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785386471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:07,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268535037] [2021-06-06 00:40:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:07,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:40:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:40:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:40:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268535037] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:40:07,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:40:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2021-06-06 00:40:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487712418] [2021-06-06 00:40:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:40:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:40:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:40:07,502 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-06 00:40:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:07,585 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-06-06 00:40:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:40:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 [2021-06-06 00:40:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:07,586 INFO L225 Difference]: With dead ends: 88 [2021-06-06 00:40:07,586 INFO L226 Difference]: Without dead ends: 40 [2021-06-06 00:40:07,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-06 00:40:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-06 00:40:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-06-06 00:40:07,587 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 23 [2021-06-06 00:40:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:07,587 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-06-06 00:40:07,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-06 00:40:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-06-06 00:40:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:40:07,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:40:07,587 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:40:07,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-06 00:40:07,808 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:40:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:40:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash 516021093, now seen corresponding path program 72 times [2021-06-06 00:40:07,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:40:07,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003212707] [2021-06-06 00:40:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:40:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:40:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:40:07,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:40:07,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003212707] [2021-06-06 00:40:07,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003212707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:40:07,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888429004] [2021-06-06 00:40:07,947 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:40:07,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:40:07,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:40:07,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-06 00:40:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:40:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-06 00:40:08,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888429004] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:40:08,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:40:08,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2021-06-06 00:40:08,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484810511] [2021-06-06 00:40:08,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:40:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:40:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:40:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:08,170 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-06 00:40:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:40:08,211 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-06-06 00:40:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:40:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 27 [2021-06-06 00:40:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:40:08,211 INFO L225 Difference]: With dead ends: 38 [2021-06-06 00:40:08,211 INFO L226 Difference]: Without dead ends: 0 [2021-06-06 00:40:08,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:40:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-06 00:40:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-06 00:40:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:40:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-06 00:40:08,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-06 00:40:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:40:08,212 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-06 00:40:08,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-06 00:40:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-06 00:40:08,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-06 00:40:08,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-06 00:40:08,427 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:40:08,430 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:40:08 BasicIcfg [2021-06-06 00:40:08,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:40:08,431 INFO L168 Benchmark]: Toolchain (without parser) took 67559.38 ms. Allocated memory was 360.7 MB in the beginning and 461.4 MB in the end (delta: 100.7 MB). Free memory was 340.7 MB in the beginning and 220.9 MB in the end (delta: 119.9 MB). Peak memory consumption was 222.0 MB. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 360.7 MB. Free memory was 341.8 MB in the beginning and 341.8 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.40 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L168 Benchmark]: Boogie Preprocessor took 11.23 ms. Allocated memory is still 360.7 MB. Free memory was 339.2 MB in the beginning and 338.3 MB in the end (delta: 919.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L168 Benchmark]: RCFGBuilder took 271.53 ms. Allocated memory is still 360.7 MB. Free memory was 338.2 MB in the beginning and 328.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L168 Benchmark]: TraceAbstraction took 67114.87 ms. Allocated memory was 360.7 MB in the beginning and 461.4 MB in the end (delta: 100.7 MB). Free memory was 327.7 MB in the beginning and 220.9 MB in the end (delta: 106.8 MB). Peak memory consumption was 209.4 MB. Max. memory is 16.0 GB. [2021-06-06 00:40:08,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 360.7 MB. Free memory was 341.8 MB in the beginning and 341.8 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.40 ms. Allocated memory is still 360.7 MB. Free memory was 340.7 MB in the beginning and 339.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.23 ms. Allocated memory is still 360.7 MB. Free memory was 339.2 MB in the beginning and 338.3 MB in the end (delta: 919.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 271.53 ms. Allocated memory is still 360.7 MB. Free memory was 338.2 MB in the beginning and 328.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 67114.87 ms. Allocated memory was 360.7 MB in the beginning and 461.4 MB in the end (delta: 100.7 MB). Free memory was 327.7 MB in the beginning and 220.9 MB in the end (delta: 106.8 MB). Peak memory consumption was 209.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 66987.5ms, OverallIterations: 104, TraceHistogramMax: 3, EmptinessCheckTime: 61.1ms, AutomataDifference: 27253.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2410 SDtfs, 4556 SDslu, 13147 SDs, 0 SdLazy, 28508 SolverSat, 1587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11212.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3278 GetRequests, 837 SyntacticMatches, 142 SemanticMatches, 2299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 27991.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=533occurred in iteration=78, InterpolantAutomatonStates: 1578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 420.6ms AutomataMinimizationTime, 104 MinimizatonAttempts, 4705 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 160.7ms SsaConstructionTime, 556.1ms SatisfiabilityAnalysisTime, 20842.0ms InterpolantComputationTime, 3387 NumberOfCodeBlocks, 3387 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3208 ConstructedInterpolants, 0 QuantifiedInterpolants, 26694 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2838 ConjunctsInSsa, 1021 ConjunctsInUnsatCore, 179 InterpolantComputations, 39 PerfectInterpolantSequences, 107/455 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...