/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:52:21,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:52:21,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:52:21,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:52:21,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:52:21,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:52:21,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:52:21,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:52:21,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:52:21,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:52:21,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:52:21,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:52:21,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:52:21,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:52:21,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:52:21,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:52:21,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:52:21,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:52:21,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:52:21,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:52:21,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:52:21,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:52:21,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:52:21,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:52:21,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:52:21,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:52:21,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:52:21,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:52:21,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:52:21,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:52:21,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:52:21,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:52:21,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:52:21,998 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:52:21,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:52:21,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:52:21,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:52:21,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:52:22,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:52:22,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:52:22,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:52:22,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:52:22,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:52:22,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:52:22,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:52:22,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:52:22,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:52:22,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:52:22,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:52:22,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:52:22,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:52:22,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:52:22,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:52:22,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:52:22,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:52:22,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:52:22,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:52:22,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:52:22,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:52:22,442 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:52:22,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2020-12-21 21:52:22,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57555d436/b7b34478cd1d464c916ef51e1f31dbf7/FLAG196217848 [2020-12-21 21:52:23,108 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:52:23,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2020-12-21 21:52:23,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57555d436/b7b34478cd1d464c916ef51e1f31dbf7/FLAG196217848 [2020-12-21 21:52:23,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57555d436/b7b34478cd1d464c916ef51e1f31dbf7 [2020-12-21 21:52:23,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:52:23,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:52:23,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:52:23,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:52:23,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:52:23,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@766b36df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23, skipping insertion in model container [2020-12-21 21:52:23,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:52:23,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:52:23,729 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2020-12-21 21:52:23,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:52:23,772 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:52:23,793 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2020-12-21 21:52:23,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:52:23,864 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:52:23,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23 WrapperNode [2020-12-21 21:52:23,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:52:23,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:52:23,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:52:23,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:52:23,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:52:23,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:52:23,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:52:23,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:52:23,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... [2020-12-21 21:52:23,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:52:23,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:52:23,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:52:23,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:52:23,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:52:24,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:52:24,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:52:24,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:52:24,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:52:24,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:52:24,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:52:24,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:52:24,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:52:24,490 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-21 21:52:24,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:52:24 BoogieIcfgContainer [2020-12-21 21:52:24,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:52:24,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:52:24,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:52:24,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:52:24,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:52:23" (1/3) ... [2020-12-21 21:52:24,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b87d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:52:24, skipping insertion in model container [2020-12-21 21:52:24,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:52:23" (2/3) ... [2020-12-21 21:52:24,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b87d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:52:24, skipping insertion in model container [2020-12-21 21:52:24,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:52:24" (3/3) ... [2020-12-21 21:52:24,501 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2020-12-21 21:52:24,508 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:52:24,512 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:52:24,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:52:24,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:52:24,574 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:52:24,574 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:52:24,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:52:24,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:52:24,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:52:24,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:52:24,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:52:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-21 21:52:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:52:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:24,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:24,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1525882359, now seen corresponding path program 1 times [2020-12-21 21:52:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:24,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86056965] [2020-12-21 21:52:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:24,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86056965] [2020-12-21 21:52:24,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:24,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:52:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968959923] [2020-12-21 21:52:24,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:52:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:52:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:24,873 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-12-21 21:52:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:25,029 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2020-12-21 21:52:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:52:25,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-21 21:52:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:25,044 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:52:25,044 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:52:25,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:52:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-12-21 21:52:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:52:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-21 21:52:25,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 12 [2020-12-21 21:52:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:25,090 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-21 21:52:25,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:52:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-21 21:52:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:52:25,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:25,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:25,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:52:25,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1053753351, now seen corresponding path program 1 times [2020-12-21 21:52:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:25,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303625413] [2020-12-21 21:52:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:52:25,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303625413] [2020-12-21 21:52:25,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:25,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:52:25,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488047347] [2020-12-21 21:52:25,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:52:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:52:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:25,197 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2020-12-21 21:52:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:25,319 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-21 21:52:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:52:25,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 21:52:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:25,321 INFO L225 Difference]: With dead ends: 52 [2020-12-21 21:52:25,321 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:52:25,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:52:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-12-21 21:52:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:52:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-12-21 21:52:25,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 14 [2020-12-21 21:52:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:25,331 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-12-21 21:52:25,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:52:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-12-21 21:52:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:52:25,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:25,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:25,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:52:25,334 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1072948653, now seen corresponding path program 1 times [2020-12-21 21:52:25,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:25,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877796807] [2020-12-21 21:52:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:52:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877796807] [2020-12-21 21:52:25,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:25,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:52:25,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928618635] [2020-12-21 21:52:25,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:52:25,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:52:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:25,532 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 4 states. [2020-12-21 21:52:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:25,635 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-12-21 21:52:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:52:25,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-21 21:52:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:25,640 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:52:25,641 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:52:25,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:52:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:52:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-12-21 21:52:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:52:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-12-21 21:52:25,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 20 [2020-12-21 21:52:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:25,660 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-12-21 21:52:25,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:52:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-12-21 21:52:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:52:25,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:25,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:25,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:52:25,663 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1602550877, now seen corresponding path program 1 times [2020-12-21 21:52:25,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:25,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132219207] [2020-12-21 21:52:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:52:25,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132219207] [2020-12-21 21:52:25,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:25,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:52:25,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194241815] [2020-12-21 21:52:25,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:52:25,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:52:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:52:25,725 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 4 states. [2020-12-21 21:52:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:25,772 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-12-21 21:52:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:52:25,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-21 21:52:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:25,774 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:52:25,774 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:52:25,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:52:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:52:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-12-21 21:52:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:52:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-12-21 21:52:25,782 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-12-21 21:52:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:25,782 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-12-21 21:52:25,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:52:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-12-21 21:52:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:52:25,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:25,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:25,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:52:25,784 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash -969039925, now seen corresponding path program 1 times [2020-12-21 21:52:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:25,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942947681] [2020-12-21 21:52:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:52:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942947681] [2020-12-21 21:52:25,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:25,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:52:25,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527102747] [2020-12-21 21:52:25,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:52:25,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:52:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:52:25,854 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2020-12-21 21:52:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:25,906 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-21 21:52:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:52:25,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 21:52:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:25,908 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:52:25,908 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:52:25,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:52:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:52:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:52:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:52:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-12-21 21:52:25,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2020-12-21 21:52:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:25,934 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-12-21 21:52:25,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:52:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-12-21 21:52:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:52:25,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:25,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:25,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 21:52:25,935 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1842211539, now seen corresponding path program 1 times [2020-12-21 21:52:25,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:25,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128169529] [2020-12-21 21:52:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:52:26,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128169529] [2020-12-21 21:52:26,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714906564] [2020-12-21 21:52:26,032 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 [2020-12-21 21:52:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:52:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:52:26,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:26,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 21:52:26,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341322030] [2020-12-21 21:52:26,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:52:26,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:26,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:52:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:52:26,280 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 7 states. [2020-12-21 21:52:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:26,524 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2020-12-21 21:52:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:52:26,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-21 21:52:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:26,526 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:52:26,526 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:52:26,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:52:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:52:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2020-12-21 21:52:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:52:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-12-21 21:52:26,538 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2020-12-21 21:52:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:26,539 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-12-21 21:52:26,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:52:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-12-21 21:52:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:52:26,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:26,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:26,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:52:26,755 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash -552134993, now seen corresponding path program 2 times [2020-12-21 21:52:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:26,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208619941] [2020-12-21 21:52:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:52:26,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208619941] [2020-12-21 21:52:26,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:52:26,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:52:26,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327722556] [2020-12-21 21:52:26,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:52:26,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:52:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:52:26,830 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-12-21 21:52:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:26,871 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-12-21 21:52:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:52:26,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:52:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:26,872 INFO L225 Difference]: With dead ends: 60 [2020-12-21 21:52:26,873 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:52:26,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:52:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:52:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-21 21:52:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:52:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-21 21:52:26,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 30 [2020-12-21 21:52:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:26,882 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-21 21:52:26,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:52:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-21 21:52:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:52:26,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:26,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:26,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-21 21:52:26,883 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -293969555, now seen corresponding path program 1 times [2020-12-21 21:52:26,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:26,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089531292] [2020-12-21 21:52:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:52:26,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089531292] [2020-12-21 21:52:26,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664217147] [2020-12-21 21:52:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:52:27,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:52:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:27,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:52:27,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809910171] [2020-12-21 21:52:27,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:52:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:52:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:52:27,203 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2020-12-21 21:52:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:27,369 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-12-21 21:52:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:52:27,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-21 21:52:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:27,371 INFO L225 Difference]: With dead ends: 115 [2020-12-21 21:52:27,371 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:52:27,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:52:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:52:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-12-21 21:52:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:52:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-21 21:52:27,381 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-12-21 21:52:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:27,381 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-21 21:52:27,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:52:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-21 21:52:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:52:27,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:27,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:27,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:27,598 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash 622364399, now seen corresponding path program 2 times [2020-12-21 21:52:27,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:27,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687460682] [2020-12-21 21:52:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:52:27,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687460682] [2020-12-21 21:52:27,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213562756] [2020-12-21 21:52:27,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:52:27,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:52:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:52:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:52:27,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:27,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 21:52:27,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962652020] [2020-12-21 21:52:27,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:52:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:27,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:52:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:52:27,962 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-12-21 21:52:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:28,104 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-12-21 21:52:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:52:28,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-12-21 21:52:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:28,111 INFO L225 Difference]: With dead ends: 129 [2020-12-21 21:52:28,115 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:52:28,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:52:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:52:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-12-21 21:52:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:52:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-21 21:52:28,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2020-12-21 21:52:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:28,144 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-21 21:52:28,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:52:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-21 21:52:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:52:28,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:28,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:28,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:28,347 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 750998513, now seen corresponding path program 3 times [2020-12-21 21:52:28,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:28,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97785462] [2020-12-21 21:52:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:52:28,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97785462] [2020-12-21 21:52:28,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19504058] [2020-12-21 21:52:28,438 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 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 [2020-12-21 21:52:28,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:52:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:52:28,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:52:28,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:28,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-21 21:52:28,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898828761] [2020-12-21 21:52:28,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:52:28,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:52:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:52:28,600 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-12-21 21:52:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:28,824 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2020-12-21 21:52:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:52:28,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-21 21:52:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:28,825 INFO L225 Difference]: With dead ends: 159 [2020-12-21 21:52:28,826 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:52:28,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:52:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:52:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 57. [2020-12-21 21:52:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-21 21:52:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-21 21:52:28,837 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 34 [2020-12-21 21:52:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:28,838 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-21 21:52:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:52:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-21 21:52:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:52:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:28,839 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:29,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:29,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 590995391, now seen corresponding path program 1 times [2020-12-21 21:52:29,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:29,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566024463] [2020-12-21 21:52:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:52:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566024463] [2020-12-21 21:52:29,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234297463] [2020-12-21 21:52:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:52:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:52:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-21 21:52:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381257748] [2020-12-21 21:52:29,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:52:29,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:52:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:52:29,455 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 15 states. [2020-12-21 21:52:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:29,642 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2020-12-21 21:52:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:52:29,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-12-21 21:52:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:29,643 INFO L225 Difference]: With dead ends: 169 [2020-12-21 21:52:29,644 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:52:29,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:52:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:52:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 59. [2020-12-21 21:52:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:52:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-12-21 21:52:29,654 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 42 [2020-12-21 21:52:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:29,654 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-12-21 21:52:29,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:52:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-12-21 21:52:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:52:29,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:29,656 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:29,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 21:52:29,871 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1800524353, now seen corresponding path program 2 times [2020-12-21 21:52:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:29,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775822292] [2020-12-21 21:52:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:52:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775822292] [2020-12-21 21:52:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777560010] [2020-12-21 21:52:29,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:30,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:52:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:52:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:52:30,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:30,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-21 21:52:30,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020205360] [2020-12-21 21:52:30,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:52:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:52:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:52:30,261 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 17 states. [2020-12-21 21:52:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:30,487 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2020-12-21 21:52:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:52:30,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-12-21 21:52:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:30,489 INFO L225 Difference]: With dead ends: 183 [2020-12-21 21:52:30,489 INFO L226 Difference]: Without dead ends: 139 [2020-12-21 21:52:30,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:52:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-21 21:52:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 61. [2020-12-21 21:52:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:52:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-21 21:52:30,501 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 44 [2020-12-21 21:52:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:30,501 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-21 21:52:30,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:52:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-21 21:52:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:52:30,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:30,502 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:30,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:30,716 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 221719619, now seen corresponding path program 3 times [2020-12-21 21:52:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:30,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079428907] [2020-12-21 21:52:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:52:30,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079428907] [2020-12-21 21:52:30,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799017142] [2020-12-21 21:52:30,873 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 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 [2020-12-21 21:52:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:52:30,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:52:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-21 21:52:31,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:31,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-12-21 21:52:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103233818] [2020-12-21 21:52:31,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:52:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:52:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:52:31,069 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 14 states. [2020-12-21 21:52:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:31,537 INFO L93 Difference]: Finished difference Result 268 states and 299 transitions. [2020-12-21 21:52:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:52:31,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-21 21:52:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:31,539 INFO L225 Difference]: With dead ends: 268 [2020-12-21 21:52:31,539 INFO L226 Difference]: Without dead ends: 224 [2020-12-21 21:52:31,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:52:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-21 21:52:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 76. [2020-12-21 21:52:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:52:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-12-21 21:52:31,552 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 46 [2020-12-21 21:52:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:31,552 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-12-21 21:52:31,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:52:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-12-21 21:52:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:52:31,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:31,554 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:31,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:31,770 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1561519059, now seen corresponding path program 4 times [2020-12-21 21:52:31,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:31,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497834447] [2020-12-21 21:52:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 21:52:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497834447] [2020-12-21 21:52:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938610309] [2020-12-21 21:52:31,901 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 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 [2020-12-21 21:52:31,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:52:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:52:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:52:32,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:32,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2020-12-21 21:52:32,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690700707] [2020-12-21 21:52:32,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:52:32,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:52:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:52:32,201 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 18 states. [2020-12-21 21:52:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:33,003 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2020-12-21 21:52:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:52:33,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-12-21 21:52:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:33,005 INFO L225 Difference]: With dead ends: 295 [2020-12-21 21:52:33,006 INFO L226 Difference]: Without dead ends: 238 [2020-12-21 21:52:33,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:52:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-21 21:52:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 82. [2020-12-21 21:52:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:52:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-12-21 21:52:33,020 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 51 [2020-12-21 21:52:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:33,021 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-12-21 21:52:33,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:52:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-12-21 21:52:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:52:33,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:33,022 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:33,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:52:33,238 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash 658499951, now seen corresponding path program 1 times [2020-12-21 21:52:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:33,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188908733] [2020-12-21 21:52:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:52:33,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188908733] [2020-12-21 21:52:33,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610165265] [2020-12-21 21:52:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:33,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:52:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:52:33,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:33,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-21 21:52:33,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346226198] [2020-12-21 21:52:33,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:52:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:52:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:52:33,687 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 23 states. [2020-12-21 21:52:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:33,971 INFO L93 Difference]: Finished difference Result 256 states and 284 transitions. [2020-12-21 21:52:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:52:33,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-12-21 21:52:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:33,973 INFO L225 Difference]: With dead ends: 256 [2020-12-21 21:52:33,973 INFO L226 Difference]: Without dead ends: 195 [2020-12-21 21:52:33,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:52:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-21 21:52:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 84. [2020-12-21 21:52:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-21 21:52:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-12-21 21:52:33,985 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 55 [2020-12-21 21:52:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:33,985 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-12-21 21:52:33,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:52:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-12-21 21:52:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:52:33,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:33,987 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:34,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:52:34,200 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1472305709, now seen corresponding path program 2 times [2020-12-21 21:52:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:34,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212158748] [2020-12-21 21:52:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:52:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212158748] [2020-12-21 21:52:34,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336927715] [2020-12-21 21:52:34,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:34,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:52:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:52:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:52:34,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:34,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-21 21:52:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695612072] [2020-12-21 21:52:34,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:52:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:52:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:52:34,687 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2020-12-21 21:52:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:35,016 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2020-12-21 21:52:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:52:35,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-12-21 21:52:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:35,018 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:52:35,018 INFO L226 Difference]: Without dead ends: 209 [2020-12-21 21:52:35,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:52:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-21 21:52:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 86. [2020-12-21 21:52:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:52:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-12-21 21:52:35,031 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 57 [2020-12-21 21:52:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:35,031 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-12-21 21:52:35,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:52:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-12-21 21:52:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:52:35,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:35,032 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:35,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:52:35,248 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1855591275, now seen corresponding path program 3 times [2020-12-21 21:52:35,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:35,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488876850] [2020-12-21 21:52:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:52:35,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488876850] [2020-12-21 21:52:35,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393427529] [2020-12-21 21:52:35,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:35,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:52:35,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:52:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-21 21:52:35,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:35,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-21 21:52:35,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448579361] [2020-12-21 21:52:35,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:52:35,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:35,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:52:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:52:35,647 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 18 states. [2020-12-21 21:52:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:36,208 INFO L93 Difference]: Finished difference Result 305 states and 342 transitions. [2020-12-21 21:52:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:52:36,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-12-21 21:52:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:36,210 INFO L225 Difference]: With dead ends: 305 [2020-12-21 21:52:36,210 INFO L226 Difference]: Without dead ends: 244 [2020-12-21 21:52:36,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=541, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:52:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-21 21:52:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2020-12-21 21:52:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:52:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-12-21 21:52:36,224 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 59 [2020-12-21 21:52:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:36,224 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-12-21 21:52:36,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:52:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-12-21 21:52:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:52:36,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:36,225 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:36,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:52:36,440 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash -736007971, now seen corresponding path program 4 times [2020-12-21 21:52:36,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:36,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271979266] [2020-12-21 21:52:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:52:36,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271979266] [2020-12-21 21:52:36,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942061027] [2020-12-21 21:52:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:36,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:52:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:52:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:52:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:52:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 21:52:37,051 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:52:37,052 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-21 21:52:37,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:52:37,065 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:52:37,068 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 21:52:37,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2020-12-21 21:52:47,149 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-21 21:52:51,251 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-21 21:52:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-12-21 21:52:51,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:51,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2020-12-21 21:52:51,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956061121] [2020-12-21 21:52:51,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:52:51,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:52:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=503, Unknown=5, NotChecked=0, Total=650 [2020-12-21 21:52:51,309 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 26 states. [2020-12-21 21:53:45,459 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-21 21:54:19,709 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-21 21:54:31,831 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-21 21:56:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:29,245 INFO L93 Difference]: Finished difference Result 405 states and 444 transitions. [2020-12-21 21:56:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-21 21:56:29,246 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-21 21:56:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:29,248 INFO L225 Difference]: With dead ends: 405 [2020-12-21 21:56:29,249 INFO L226 Difference]: Without dead ends: 333 [2020-12-21 21:56:29,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 117.9s TimeCoverageRelationStatistics Valid=1359, Invalid=3990, Unknown=53, NotChecked=0, Total=5402 [2020-12-21 21:56:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-21 21:56:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 102. [2020-12-21 21:56:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 21:56:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2020-12-21 21:56:29,266 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 67 [2020-12-21 21:56:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:29,267 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2020-12-21 21:56:29,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:56:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2020-12-21 21:56:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:56:29,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:29,268 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:29,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:56:29,483 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2026616013, now seen corresponding path program 1 times [2020-12-21 21:56:29,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:29,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744241999] [2020-12-21 21:56:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:56:29,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744241999] [2020-12-21 21:56:29,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100363229] [2020-12-21 21:56:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:56:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:56:30,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:30,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-21 21:56:30,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605679049] [2020-12-21 21:56:30,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:56:30,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:56:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:56:30,352 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 31 states. [2020-12-21 21:56:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:30,933 INFO L93 Difference]: Finished difference Result 336 states and 374 transitions. [2020-12-21 21:56:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:56:30,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-12-21 21:56:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:30,936 INFO L225 Difference]: With dead ends: 336 [2020-12-21 21:56:30,937 INFO L226 Difference]: Without dead ends: 263 [2020-12-21 21:56:30,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:56:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-21 21:56:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 104. [2020-12-21 21:56:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:56:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-12-21 21:56:30,957 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 71 [2020-12-21 21:56:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:30,957 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-12-21 21:56:30,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:56:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-12-21 21:56:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:56:30,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:30,959 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:31,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:31,175 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1013497841, now seen corresponding path program 2 times [2020-12-21 21:56:31,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:31,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317501489] [2020-12-21 21:56:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:56:31,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317501489] [2020-12-21 21:56:31,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610579980] [2020-12-21 21:56:31,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:31,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:31,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:56:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:56:32,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:32,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-21 21:56:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513010543] [2020-12-21 21:56:32,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:56:32,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:56:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:56:32,058 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 33 states. [2020-12-21 21:56:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:32,641 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2020-12-21 21:56:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:56:32,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-12-21 21:56:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:32,645 INFO L225 Difference]: With dead ends: 350 [2020-12-21 21:56:32,645 INFO L226 Difference]: Without dead ends: 277 [2020-12-21 21:56:32,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:56:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-21 21:56:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 106. [2020-12-21 21:56:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:56:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2020-12-21 21:56:32,674 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 73 [2020-12-21 21:56:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:32,675 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2020-12-21 21:56:32,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:56:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2020-12-21 21:56:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:56:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:32,677 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:32,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:32,889 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:32,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1985150255, now seen corresponding path program 3 times [2020-12-21 21:56:32,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:32,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72173713] [2020-12-21 21:56:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:56:33,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72173713] [2020-12-21 21:56:33,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858581473] [2020-12-21 21:56:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:33,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:56:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:56:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2020-12-21 21:56:33,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:33,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2020-12-21 21:56:33,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69208155] [2020-12-21 21:56:33,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:56:33,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:56:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:56:33,506 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand 23 states. [2020-12-21 21:56:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:34,451 INFO L93 Difference]: Finished difference Result 385 states and 432 transitions. [2020-12-21 21:56:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:56:34,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-12-21 21:56:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:34,453 INFO L225 Difference]: With dead ends: 385 [2020-12-21 21:56:34,454 INFO L226 Difference]: Without dead ends: 312 [2020-12-21 21:56:34,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:56:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-21 21:56:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 119. [2020-12-21 21:56:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 21:56:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-12-21 21:56:34,471 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 75 [2020-12-21 21:56:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:34,471 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-12-21 21:56:34,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:56:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-12-21 21:56:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:56:34,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:34,472 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:34,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:56:34,686 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:34,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1859565407, now seen corresponding path program 4 times [2020-12-21 21:56:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:34,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772103281] [2020-12-21 21:56:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:56:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772103281] [2020-12-21 21:56:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012975935] [2020-12-21 21:56:35,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:35,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:56:35,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:35,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:56:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-21 21:56:35,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:35,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2020-12-21 21:56:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863354852] [2020-12-21 21:56:35,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:56:35,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:56:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:56:35,913 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 34 states. [2020-12-21 21:56:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:39,646 INFO L93 Difference]: Finished difference Result 536 states and 600 transitions. [2020-12-21 21:56:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-21 21:56:39,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 83 [2020-12-21 21:56:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:39,652 INFO L225 Difference]: With dead ends: 536 [2020-12-21 21:56:39,652 INFO L226 Difference]: Without dead ends: 452 [2020-12-21 21:56:39,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2358, Invalid=6572, Unknown=0, NotChecked=0, Total=8930 [2020-12-21 21:56:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-12-21 21:56:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 162. [2020-12-21 21:56:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:56:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 180 transitions. [2020-12-21 21:56:39,681 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 180 transitions. Word has length 83 [2020-12-21 21:56:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:39,681 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 180 transitions. [2020-12-21 21:56:39,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:56:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 180 transitions. [2020-12-21 21:56:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:56:39,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:39,683 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:39,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:39,897 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1455479749, now seen corresponding path program 1 times [2020-12-21 21:56:39,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:39,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245836274] [2020-12-21 21:56:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 21:56:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245836274] [2020-12-21 21:56:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496585882] [2020-12-21 21:56:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 21:56:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:56:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 21:56:41,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:41,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-21 21:56:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318486567] [2020-12-21 21:56:41,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:56:41,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:56:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=894, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:56:41,115 INFO L87 Difference]: Start difference. First operand 162 states and 180 transitions. Second operand 39 states. [2020-12-21 21:56:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:41,849 INFO L93 Difference]: Finished difference Result 492 states and 543 transitions. [2020-12-21 21:56:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:56:41,849 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-12-21 21:56:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:41,852 INFO L225 Difference]: With dead ends: 492 [2020-12-21 21:56:41,852 INFO L226 Difference]: Without dead ends: 367 [2020-12-21 21:56:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=588, Invalid=894, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:56:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-21 21:56:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 164. [2020-12-21 21:56:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:56:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2020-12-21 21:56:41,880 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 89 [2020-12-21 21:56:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:41,880 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2020-12-21 21:56:41,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:56:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2020-12-21 21:56:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:56:41,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:41,881 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:42,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:56:42,095 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:42,096 INFO L82 PathProgramCache]: Analyzing trace with hash -768400007, now seen corresponding path program 2 times [2020-12-21 21:56:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:42,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981650501] [2020-12-21 21:56:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 21:56:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981650501] [2020-12-21 21:56:42,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959948887] [2020-12-21 21:56:42,564 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 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 [2020-12-21 21:56:42,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:56:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 21:56:43,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:43,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-21 21:56:43,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510425068] [2020-12-21 21:56:43,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:56:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:56:43,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=991, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:56:43,418 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 41 states. [2020-12-21 21:56:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:44,342 INFO L93 Difference]: Finished difference Result 506 states and 558 transitions. [2020-12-21 21:56:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:56:44,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-12-21 21:56:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:44,346 INFO L225 Difference]: With dead ends: 506 [2020-12-21 21:56:44,349 INFO L226 Difference]: Without dead ends: 381 [2020-12-21 21:56:44,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=991, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:56:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-21 21:56:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 166. [2020-12-21 21:56:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-21 21:56:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2020-12-21 21:56:44,381 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 91 [2020-12-21 21:56:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:44,381 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2020-12-21 21:56:44,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:56:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2020-12-21 21:56:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:56:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:44,383 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:44,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:56:44,598 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1909731529, now seen corresponding path program 3 times [2020-12-21 21:56:44,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:44,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427315216] [2020-12-21 21:56:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 21:56:45,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427315216] [2020-12-21 21:56:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535017565] [2020-12-21 21:56:45,085 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 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 [2020-12-21 21:56:45,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:56:45,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:56:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-12-21 21:56:45,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:45,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2020-12-21 21:56:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717337005] [2020-12-21 21:56:45,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:56:45,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:56:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:56:45,464 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand 28 states. [2020-12-21 21:56:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:46,843 INFO L93 Difference]: Finished difference Result 541 states and 601 transitions. [2020-12-21 21:56:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:56:46,843 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 93 [2020-12-21 21:56:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:46,847 INFO L225 Difference]: With dead ends: 541 [2020-12-21 21:56:46,847 INFO L226 Difference]: Without dead ends: 416 [2020-12-21 21:56:46,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=1466, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:56:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-21 21:56:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 179. [2020-12-21 21:56:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 21:56:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 200 transitions. [2020-12-21 21:56:46,884 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 200 transitions. Word has length 93 [2020-12-21 21:56:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:46,884 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 200 transitions. [2020-12-21 21:56:46,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:56:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 200 transitions. [2020-12-21 21:56:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:56:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:46,886 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:47,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:56:47,101 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1243642921, now seen corresponding path program 4 times [2020-12-21 21:56:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:47,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081727865] [2020-12-21 21:56:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-21 21:56:47,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081727865] [2020-12-21 21:56:47,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448723104] [2020-12-21 21:56:47,578 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 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 [2020-12-21 21:56:47,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:56:47,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:56:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-21 21:56:48,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:56:48,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-21 21:56:48,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269935131] [2020-12-21 21:56:48,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:56:48,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:48,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:56:48,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1200, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:56:48,474 INFO L87 Difference]: Start difference. First operand 179 states and 200 transitions. Second operand 45 states. [2020-12-21 21:56:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:49,292 INFO L93 Difference]: Finished difference Result 556 states and 616 transitions. [2020-12-21 21:56:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:56:49,293 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-12-21 21:56:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:49,297 INFO L225 Difference]: With dead ends: 556 [2020-12-21 21:56:49,297 INFO L226 Difference]: Without dead ends: 420 [2020-12-21 21:56:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=1200, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:56:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-21 21:56:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 181. [2020-12-21 21:56:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-21 21:56:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2020-12-21 21:56:49,327 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 101 [2020-12-21 21:56:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:49,327 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2020-12-21 21:56:49,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:56:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2020-12-21 21:56:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:56:49,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:49,329 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:49,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:56:49,543 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -338259865, now seen corresponding path program 5 times [2020-12-21 21:56:49,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:49,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386550883] [2020-12-21 21:56:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-21 21:56:50,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386550883] [2020-12-21 21:56:50,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188346626] [2020-12-21 21:56:50,074 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 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