/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:23,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:23,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:23,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:23,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:23,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:23,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:23,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:23,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:23,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:23,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:23,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:23,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:23,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:23,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:23,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:23,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:23,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:23,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:23,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:23,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:23,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:23,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:23,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:23,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:23,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:23,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:23,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:23,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:56:23,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:23,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:23,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:23,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:23,257 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:23,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:23,258 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:23,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:23,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:23,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:23,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:23,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:23,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:23,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:23,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:23,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:23,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:23,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:23,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:23,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:23,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:23,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:23,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:23,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:23,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:23,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:23,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:23,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:23,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:23,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:23,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:23,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:23,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:23,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:23,776 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:23,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-10-23 17:56:23,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efdc1de8/e3d24447590a462888fe57d78166e9b2/FLAGebfdba755 [2020-10-23 17:56:24,510 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:24,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-10-23 17:56:24,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efdc1de8/e3d24447590a462888fe57d78166e9b2/FLAGebfdba755 [2020-10-23 17:56:24,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efdc1de8/e3d24447590a462888fe57d78166e9b2 [2020-10-23 17:56:24,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:24,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:24,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:24,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:24,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:24,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:24" (1/1) ... [2020-10-23 17:56:24,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ceeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:24, skipping insertion in model container [2020-10-23 17:56:24,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:24" (1/1) ... [2020-10-23 17:56:24,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:24,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:25,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:25,155 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:25,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:25,237 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:25,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25 WrapperNode [2020-10-23 17:56:25,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:25,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:25,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:25,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:25,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:25,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:25,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:25,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:25,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (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 [2020-10-23 17:56:25,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:25,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-10-23 17:56:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 17:56:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:26,198 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:26,200 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 17:56:26,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:26 BoogieIcfgContainer [2020-10-23 17:56:26,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:26,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:26,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:26,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:26,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:24" (1/3) ... [2020-10-23 17:56:26,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de6d883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:26, skipping insertion in model container [2020-10-23 17:56:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25" (2/3) ... [2020-10-23 17:56:26,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de6d883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:26, skipping insertion in model container [2020-10-23 17:56:26,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:26" (3/3) ... [2020-10-23 17:56:26,218 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-10-23 17:56:26,232 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:26,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:26,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:26,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:26,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:26,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:26,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:26,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:26,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:26,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:26,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-23 17:56:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 17:56:26,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:26,318 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:26,319 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:26,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1471639594, now seen corresponding path program 1 times [2020-10-23 17:56:26,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:26,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196658045] [2020-10-23 17:56:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:26,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196658045] [2020-10-23 17:56:26,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:26,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:56:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698085779] [2020-10-23 17:56:26,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:56:26,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:26,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:56:26,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:56:26,770 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-10-23 17:56:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:28,005 INFO L93 Difference]: Finished difference Result 124 states and 181 transitions. [2020-10-23 17:56:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 17:56:28,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-23 17:56:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:28,032 INFO L225 Difference]: With dead ends: 124 [2020-10-23 17:56:28,032 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 17:56:28,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 17:56:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 17:56:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 17:56:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 17:56:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-23 17:56:28,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 50 [2020-10-23 17:56:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:28,143 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-23 17:56:28,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:56:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-23 17:56:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:28,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:28,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:28,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:28,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash -32852944, now seen corresponding path program 1 times [2020-10-23 17:56:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:28,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690039211] [2020-10-23 17:56:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690039211] [2020-10-23 17:56:28,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:28,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 17:56:28,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663083828] [2020-10-23 17:56:28,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 17:56:28,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 17:56:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 17:56:28,429 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 5 states. [2020-10-23 17:56:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:28,814 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-10-23 17:56:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 17:56:28,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-10-23 17:56:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:28,821 INFO L225 Difference]: With dead ends: 67 [2020-10-23 17:56:28,822 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 17:56:28,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 17:56:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 17:56:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 17:56:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2020-10-23 17:56:28,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 52 [2020-10-23 17:56:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:28,847 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2020-10-23 17:56:28,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 17:56:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2020-10-23 17:56:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:28,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:28,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:28,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:56:28,851 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1621200846, now seen corresponding path program 1 times [2020-10-23 17:56:28,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:28,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70619261] [2020-10-23 17:56:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70619261] [2020-10-23 17:56:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112632904] [2020-10-23 17:56:29,070 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 [2020-10-23 17:56:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:29,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:56:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2020-10-23 17:56:29,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549479859] [2020-10-23 17:56:29,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 17:56:29,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:29,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 17:56:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:29,322 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 8 states. [2020-10-23 17:56:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:29,459 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-23 17:56:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:56:29,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-23 17:56:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:29,464 INFO L225 Difference]: With dead ends: 92 [2020-10-23 17:56:29,465 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 17:56:29,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 17:56:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-23 17:56:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 17:56:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2020-10-23 17:56:29,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 52 [2020-10-23 17:56:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:29,487 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2020-10-23 17:56:29,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 17:56:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2020-10-23 17:56:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:29,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:29,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:29,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 17:56:29,706 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2086960436, now seen corresponding path program 1 times [2020-10-23 17:56:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182770077] [2020-10-23 17:56:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182770077] [2020-10-23 17:56:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589104418] [2020-10-23 17:56:29,861 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 [2020-10-23 17:56:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 17:56:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:56:30,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:30,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-23 17:56:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584026563] [2020-10-23 17:56:30,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 17:56:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 17:56:30,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:30,090 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 10 states. [2020-10-23 17:56:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:32,859 INFO L93 Difference]: Finished difference Result 171 states and 239 transitions. [2020-10-23 17:56:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 17:56:32,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-23 17:56:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:32,863 INFO L225 Difference]: With dead ends: 171 [2020-10-23 17:56:32,864 INFO L226 Difference]: Without dead ends: 114 [2020-10-23 17:56:32,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-23 17:56:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-23 17:56:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-23 17:56:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 17:56:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-10-23 17:56:32,895 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 52 [2020-10-23 17:56:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:32,896 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-10-23 17:56:32,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 17:56:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-10-23 17:56:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 17:56:32,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:32,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:33,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:33,115 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2109457551, now seen corresponding path program 1 times [2020-10-23 17:56:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:33,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601522731] [2020-10-23 17:56:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 17:56:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 17:56:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 17:56:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:33,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601522731] [2020-10-23 17:56:33,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095430310] [2020-10-23 17:56:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 17:56:33,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:33,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-10-23 17:56:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033021028] [2020-10-23 17:56:33,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:56:33,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:56:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:33,418 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 4 states. [2020-10-23 17:56:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:33,507 INFO L93 Difference]: Finished difference Result 192 states and 261 transitions. [2020-10-23 17:56:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 17:56:33,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-23 17:56:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:33,510 INFO L225 Difference]: With dead ends: 192 [2020-10-23 17:56:33,511 INFO L226 Difference]: Without dead ends: 108 [2020-10-23 17:56:33,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:56:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-23 17:56:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-10-23 17:56:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 17:56:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2020-10-23 17:56:33,548 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 57 [2020-10-23 17:56:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:33,548 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2020-10-23 17:56:33,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:56:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2020-10-23 17:56:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 17:56:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:33,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:33,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:33,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -136006542, now seen corresponding path program 1 times [2020-10-23 17:56:33,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:33,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722210697] [2020-10-23 17:56:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 17:56:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 17:56:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:56:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:33,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722210697] [2020-10-23 17:56:33,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:33,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:56:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5972706] [2020-10-23 17:56:33,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:56:33,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:56:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:33,890 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand 7 states. [2020-10-23 17:56:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:36,269 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2020-10-23 17:56:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:56:36,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-23 17:56:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:36,275 INFO L225 Difference]: With dead ends: 112 [2020-10-23 17:56:36,278 INFO L226 Difference]: Without dead ends: 105 [2020-10-23 17:56:36,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-23 17:56:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-23 17:56:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 17:56:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-10-23 17:56:36,330 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 59 [2020-10-23 17:56:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:36,331 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-10-23 17:56:36,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:56:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-10-23 17:56:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 17:56:36,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:36,341 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:36,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 17:56:36,341 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1911013904, now seen corresponding path program 1 times [2020-10-23 17:56:36,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:36,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221060275] [2020-10-23 17:56:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 17:56:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 17:56:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:56:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:36,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221060275] [2020-10-23 17:56:36,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653708663] [2020-10-23 17:56:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 17:56:36,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:36,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:36,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-23 17:56:36,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412350661] [2020-10-23 17:56:36,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 17:56:36,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 17:56:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:36,754 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 5 states. [2020-10-23 17:56:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:36,963 INFO L93 Difference]: Finished difference Result 218 states and 301 transitions. [2020-10-23 17:56:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:56:36,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-23 17:56:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:36,970 INFO L225 Difference]: With dead ends: 218 [2020-10-23 17:56:36,970 INFO L226 Difference]: Without dead ends: 128 [2020-10-23 17:56:36,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-23 17:56:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-10-23 17:56:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-23 17:56:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2020-10-23 17:56:37,016 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 59 [2020-10-23 17:56:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:37,016 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2020-10-23 17:56:37,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 17:56:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2020-10-23 17:56:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 17:56:37,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:37,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:37,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:37,226 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -606085056, now seen corresponding path program 1 times [2020-10-23 17:56:37,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:37,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618516962] [2020-10-23 17:56:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 17:56:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 17:56:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 17:56:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:37,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618516962] [2020-10-23 17:56:37,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980450272] [2020-10-23 17:56:37,368 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 [2020-10-23 17:56:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 17:56:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:37,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:37,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-23 17:56:37,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432485273] [2020-10-23 17:56:37,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:56:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:56:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:37,589 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand 9 states. [2020-10-23 17:56:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:38,273 INFO L93 Difference]: Finished difference Result 222 states and 309 transitions. [2020-10-23 17:56:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:56:38,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-23 17:56:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:38,279 INFO L225 Difference]: With dead ends: 222 [2020-10-23 17:56:38,279 INFO L226 Difference]: Without dead ends: 128 [2020-10-23 17:56:38,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-23 17:56:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-10-23 17:56:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-23 17:56:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2020-10-23 17:56:38,329 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 60 [2020-10-23 17:56:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:38,330 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2020-10-23 17:56:38,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:56:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2020-10-23 17:56:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 17:56:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:38,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:38,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:38,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 401000705, now seen corresponding path program 1 times [2020-10-23 17:56:38,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:38,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979830712] [2020-10-23 17:56:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-23 17:56:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 17:56:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:38,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979830712] [2020-10-23 17:56:38,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626691749] [2020-10-23 17:56:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 17:56:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:56:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:38,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:38,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-23 17:56:38,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417518438] [2020-10-23 17:56:38,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:56:38,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:56:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:38,955 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand 11 states. [2020-10-23 17:56:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:42,267 INFO L93 Difference]: Finished difference Result 241 states and 335 transitions. [2020-10-23 17:56:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 17:56:42,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-23 17:56:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:42,271 INFO L225 Difference]: With dead ends: 241 [2020-10-23 17:56:42,271 INFO L226 Difference]: Without dead ends: 141 [2020-10-23 17:56:42,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:56:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-23 17:56:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2020-10-23 17:56:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 17:56:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 164 transitions. [2020-10-23 17:56:42,307 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 164 transitions. Word has length 62 [2020-10-23 17:56:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:42,307 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 164 transitions. [2020-10-23 17:56:42,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:56:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 164 transitions. [2020-10-23 17:56:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 17:56:42,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:42,309 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:42,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:42,523 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1948076209, now seen corresponding path program 2 times [2020-10-23 17:56:42,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:42,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970145019] [2020-10-23 17:56:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:56:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:56:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 17:56:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:42,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970145019] [2020-10-23 17:56:42,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767261708] [2020-10-23 17:56:42,706 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 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 [2020-10-23 17:56:42,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-23 17:56:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:56:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-23 17:56:42,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:42,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-10-23 17:56:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200307276] [2020-10-23 17:56:42,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:56:42,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:56:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:42,889 INFO L87 Difference]: Start difference. First operand 120 states and 164 transitions. Second operand 6 states. [2020-10-23 17:56:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:42,962 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2020-10-23 17:56:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:56:42,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-23 17:56:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:42,966 INFO L225 Difference]: With dead ends: 138 [2020-10-23 17:56:42,966 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 17:56:42,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-23 17:56:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 17:56:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-23 17:56:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-23 17:56:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2020-10-23 17:56:42,993 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 63 [2020-10-23 17:56:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:42,993 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2020-10-23 17:56:42,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:56:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2020-10-23 17:56:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 17:56:43,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:43,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:43,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 17:56:43,219 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1904706916, now seen corresponding path program 1 times [2020-10-23 17:56:43,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:43,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915443] [2020-10-23 17:56:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:56:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 17:56:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 17:56:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:43,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915443] [2020-10-23 17:56:43,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464330453] [2020-10-23 17:56:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 17:56:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 17:56:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:43,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:43,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-23 17:56:43,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866508568] [2020-10-23 17:56:43,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:56:43,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:56:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:43,584 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand 11 states. [2020-10-23 17:56:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:44,572 INFO L93 Difference]: Finished difference Result 243 states and 327 transitions. [2020-10-23 17:56:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 17:56:44,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-23 17:56:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:44,575 INFO L225 Difference]: With dead ends: 243 [2020-10-23 17:56:44,575 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 17:56:44,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:56:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 17:56:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-10-23 17:56:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-23 17:56:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2020-10-23 17:56:44,595 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 65 [2020-10-23 17:56:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:44,596 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2020-10-23 17:56:44,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:56:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2020-10-23 17:56:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 17:56:44,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:44,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:44,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 17:56:44,813 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1033852379, now seen corresponding path program 1 times [2020-10-23 17:56:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:44,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208189742] [2020-10-23 17:56:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 17:56:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:56:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 17:56:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208189742] [2020-10-23 17:56:45,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584243966] [2020-10-23 17:56:45,056 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 [2020-10-23 17:56:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 17:56:45,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:45,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:45,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-23 17:56:45,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070667651] [2020-10-23 17:56:45,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 17:56:45,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:45,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 17:56:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:45,272 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand 13 states. [2020-10-23 17:56:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:47,042 INFO L93 Difference]: Finished difference Result 256 states and 343 transitions. [2020-10-23 17:56:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 17:56:47,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-23 17:56:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:47,045 INFO L225 Difference]: With dead ends: 256 [2020-10-23 17:56:47,045 INFO L226 Difference]: Without dead ends: 152 [2020-10-23 17:56:47,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-23 17:56:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-23 17:56:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2020-10-23 17:56:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-23 17:56:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 168 transitions. [2020-10-23 17:56:47,071 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 168 transitions. Word has length 67 [2020-10-23 17:56:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:47,073 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 168 transitions. [2020-10-23 17:56:47,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 17:56:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 168 transitions. [2020-10-23 17:56:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 17:56:47,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:47,075 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:47,289 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1850458037, now seen corresponding path program 2 times [2020-10-23 17:56:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:47,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402842793] [2020-10-23 17:56:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 17:56:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 17:56:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 17:56:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:47,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402842793] [2020-10-23 17:56:47,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021594989] [2020-10-23 17:56:47,431 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 [2020-10-23 17:56:47,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:56:47,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 17:56:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:47,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:47,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-23 17:56:47,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200718015] [2020-10-23 17:56:47,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 17:56:47,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:47,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 17:56:47,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:47,599 INFO L87 Difference]: Start difference. First operand 127 states and 168 transitions. Second operand 13 states. [2020-10-23 17:56:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:48,756 INFO L93 Difference]: Finished difference Result 259 states and 350 transitions. [2020-10-23 17:56:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 17:56:48,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-23 17:56:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:48,763 INFO L225 Difference]: With dead ends: 259 [2020-10-23 17:56:48,763 INFO L226 Difference]: Without dead ends: 155 [2020-10-23 17:56:48,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2020-10-23 17:56:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-23 17:56:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-10-23 17:56:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-23 17:56:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2020-10-23 17:56:48,783 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 68 [2020-10-23 17:56:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:48,784 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2020-10-23 17:56:48,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 17:56:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2020-10-23 17:56:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-23 17:56:48,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:48,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:49,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:49,001 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1627417546, now seen corresponding path program 2 times [2020-10-23 17:56:49,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096305061] [2020-10-23 17:56:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 17:56:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 17:56:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:56:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096305061] [2020-10-23 17:56:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020574626] [2020-10-23 17:56:49,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:49,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:56:49,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:49,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:49,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-23 17:56:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707627549] [2020-10-23 17:56:49,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:56:49,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:56:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:49,477 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand 15 states. [2020-10-23 17:56:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:51,030 INFO L93 Difference]: Finished difference Result 269 states and 361 transitions. [2020-10-23 17:56:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 17:56:51,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-23 17:56:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:51,033 INFO L225 Difference]: With dead ends: 269 [2020-10-23 17:56:51,033 INFO L226 Difference]: Without dead ends: 162 [2020-10-23 17:56:51,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-23 17:56:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-23 17:56:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 133. [2020-10-23 17:56:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-23 17:56:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 176 transitions. [2020-10-23 17:56:51,056 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 176 transitions. Word has length 70 [2020-10-23 17:56:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:51,056 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 176 transitions. [2020-10-23 17:56:51,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:56:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 176 transitions. [2020-10-23 17:56:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-23 17:56:51,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:51,058 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:51,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 17:56:51,273 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 629807044, now seen corresponding path program 3 times [2020-10-23 17:56:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:51,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119946828] [2020-10-23 17:56:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 17:56:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 17:56:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119946828] [2020-10-23 17:56:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930441959] [2020-10-23 17:56:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 17:56:51,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:51,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:56:51,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-23 17:56:51,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:51,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-10-23 17:56:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736708253] [2020-10-23 17:56:51,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 17:56:51,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 17:56:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:51,662 INFO L87 Difference]: Start difference. First operand 133 states and 176 transitions. Second operand 13 states. [2020-10-23 17:56:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:53,460 INFO L93 Difference]: Finished difference Result 307 states and 446 transitions. [2020-10-23 17:56:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 17:56:53,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-23 17:56:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:53,463 INFO L225 Difference]: With dead ends: 307 [2020-10-23 17:56:53,464 INFO L226 Difference]: Without dead ends: 192 [2020-10-23 17:56:53,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-10-23 17:56:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-23 17:56:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 144. [2020-10-23 17:56:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 17:56:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 196 transitions. [2020-10-23 17:56:53,510 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 196 transitions. Word has length 71 [2020-10-23 17:56:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:53,510 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 196 transitions. [2020-10-23 17:56:53,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 17:56:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 196 transitions. [2020-10-23 17:56:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 17:56:53,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:53,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:53,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-23 17:56:53,728 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1418553148, now seen corresponding path program 1 times [2020-10-23 17:56:53,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:53,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477992663] [2020-10-23 17:56:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 17:56:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 17:56:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477992663] [2020-10-23 17:56:53,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528117339] [2020-10-23 17:56:53,994 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 [2020-10-23 17:56:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 17:56:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:54,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:54,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-23 17:56:54,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347595160] [2020-10-23 17:56:54,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 17:56:54,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 17:56:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:56:54,287 INFO L87 Difference]: Start difference. First operand 144 states and 196 transitions. Second operand 17 states. [2020-10-23 17:56:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:56,958 INFO L93 Difference]: Finished difference Result 291 states and 411 transitions. [2020-10-23 17:56:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 17:56:56,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-23 17:56:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:56,961 INFO L225 Difference]: With dead ends: 291 [2020-10-23 17:56:56,962 INFO L226 Difference]: Without dead ends: 179 [2020-10-23 17:56:56,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2020-10-23 17:56:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-23 17:56:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 146. [2020-10-23 17:56:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-23 17:56:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2020-10-23 17:56:56,983 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 76 [2020-10-23 17:56:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:56,983 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2020-10-23 17:56:56,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 17:56:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2020-10-23 17:56:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 17:56:56,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:56,986 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:57,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 17:56:57,201 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1332148116, now seen corresponding path program 1 times [2020-10-23 17:56:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:57,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549687474] [2020-10-23 17:56:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 17:56:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 17:56:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 17:56:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:57,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549687474] [2020-10-23 17:56:57,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683559766] [2020-10-23 17:56:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 17:56:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 17:56:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:57,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:57,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-23 17:56:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453581858] [2020-10-23 17:56:57,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 17:56:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 17:56:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:56:57,729 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand 17 states. [2020-10-23 17:57:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:00,218 INFO L93 Difference]: Finished difference Result 300 states and 431 transitions. [2020-10-23 17:57:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 17:57:00,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-23 17:57:00,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:00,221 INFO L225 Difference]: With dead ends: 300 [2020-10-23 17:57:00,222 INFO L226 Difference]: Without dead ends: 188 [2020-10-23 17:57:00,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2020-10-23 17:57:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-23 17:57:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 150. [2020-10-23 17:57:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-23 17:57:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 204 transitions. [2020-10-23 17:57:00,244 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 204 transitions. Word has length 77 [2020-10-23 17:57:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:00,244 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 204 transitions. [2020-10-23 17:57:00,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 17:57:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 204 transitions. [2020-10-23 17:57:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 17:57:00,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:00,247 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:00,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:00,461 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash 603340875, now seen corresponding path program 2 times [2020-10-23 17:57:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:00,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577653622] [2020-10-23 17:57:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 17:57:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-23 17:57:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577653622] [2020-10-23 17:57:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136721202] [2020-10-23 17:57:00,840 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 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 [2020-10-23 17:57:01,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 17:57:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:01,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:01,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-10-23 17:57:01,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382971887] [2020-10-23 17:57:01,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 17:57:01,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 17:57:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:01,490 INFO L87 Difference]: Start difference. First operand 150 states and 204 transitions. Second operand 19 states. [2020-10-23 17:57:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:04,019 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2020-10-23 17:57:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 17:57:04,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-23 17:57:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:04,022 INFO L225 Difference]: With dead ends: 304 [2020-10-23 17:57:04,023 INFO L226 Difference]: Without dead ends: 189 [2020-10-23 17:57:04,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 17:57:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-23 17:57:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2020-10-23 17:57:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-23 17:57:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 207 transitions. [2020-10-23 17:57:04,047 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 207 transitions. Word has length 79 [2020-10-23 17:57:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:04,047 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 207 transitions. [2020-10-23 17:57:04,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 17:57:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 207 transitions. [2020-10-23 17:57:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-23 17:57:04,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:04,050 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:04,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 17:57:04,265 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash -833924803, now seen corresponding path program 2 times [2020-10-23 17:57:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681152577] [2020-10-23 17:57:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 17:57:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 17:57:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 17:57:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:04,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681152577] [2020-10-23 17:57:04,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694890798] [2020-10-23 17:57:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:04,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:57:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:04,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:04,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-10-23 17:57:04,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222282843] [2020-10-23 17:57:04,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 17:57:04,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:04,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 17:57:04,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:04,761 INFO L87 Difference]: Start difference. First operand 152 states and 207 transitions. Second operand 19 states. [2020-10-23 17:57:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:06,906 INFO L93 Difference]: Finished difference Result 316 states and 456 transitions. [2020-10-23 17:57:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 17:57:06,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-10-23 17:57:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:06,916 INFO L225 Difference]: With dead ends: 316 [2020-10-23 17:57:06,916 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 17:57:06,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=421, Invalid=769, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 17:57:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 17:57:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-10-23 17:57:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-23 17:57:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 212 transitions. [2020-10-23 17:57:06,940 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 212 transitions. Word has length 80 [2020-10-23 17:57:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:06,941 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 212 transitions. [2020-10-23 17:57:06,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 17:57:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 212 transitions. [2020-10-23 17:57:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 17:57:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:06,943 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:07,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:07,158 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:07,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1640392484, now seen corresponding path program 3 times [2020-10-23 17:57:07,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:07,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779890385] [2020-10-23 17:57:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 17:57:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 17:57:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 17:57:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:07,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779890385] [2020-10-23 17:57:07,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96114983] [2020-10-23 17:57:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:07,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:57:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 17:57:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-23 17:57:07,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:07,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-10-23 17:57:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296811035] [2020-10-23 17:57:07,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 17:57:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 17:57:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:07,782 INFO L87 Difference]: Start difference. First operand 156 states and 212 transitions. Second operand 19 states. [2020-10-23 17:57:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:11,851 INFO L93 Difference]: Finished difference Result 328 states and 469 transitions. [2020-10-23 17:57:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 17:57:11,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-23 17:57:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:11,857 INFO L225 Difference]: With dead ends: 328 [2020-10-23 17:57:11,858 INFO L226 Difference]: Without dead ends: 216 [2020-10-23 17:57:11,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=495, Invalid=2585, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 17:57:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-23 17:57:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 173. [2020-10-23 17:57:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-23 17:57:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 240 transitions. [2020-10-23 17:57:11,896 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 240 transitions. Word has length 82 [2020-10-23 17:57:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:11,896 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 240 transitions. [2020-10-23 17:57:11,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 17:57:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 240 transitions. [2020-10-23 17:57:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 17:57:11,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:11,898 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:12,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:12,112 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1603716746, now seen corresponding path program 1 times [2020-10-23 17:57:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:12,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648789864] [2020-10-23 17:57:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 17:57:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 17:57:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 17:57:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:12,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648789864] [2020-10-23 17:57:12,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757910317] [2020-10-23 17:57:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 17:57:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 17:57:12,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:12,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:12,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-23 17:57:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194578117] [2020-10-23 17:57:12,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 17:57:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 17:57:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 17:57:12,645 INFO L87 Difference]: Start difference. First operand 173 states and 240 transitions. Second operand 21 states. [2020-10-23 17:57:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:14,761 INFO L93 Difference]: Finished difference Result 368 states and 546 transitions. [2020-10-23 17:57:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 17:57:14,762 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-10-23 17:57:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:14,765 INFO L225 Difference]: With dead ends: 368 [2020-10-23 17:57:14,765 INFO L226 Difference]: Without dead ends: 234 [2020-10-23 17:57:14,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=959, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 17:57:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-23 17:57:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2020-10-23 17:57:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-23 17:57:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 247 transitions. [2020-10-23 17:57:14,801 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 247 transitions. Word has length 83 [2020-10-23 17:57:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:14,802 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 247 transitions. [2020-10-23 17:57:14,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 17:57:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 247 transitions. [2020-10-23 17:57:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 17:57:14,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:14,804 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:15,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-23 17:57:15,017 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1149036137, now seen corresponding path program 1 times [2020-10-23 17:57:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:15,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745098015] [2020-10-23 17:57:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 17:57:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 17:57:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 17:57:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745098015] [2020-10-23 17:57:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734412369] [2020-10-23 17:57:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 17:57:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:15,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:15,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-23 17:57:15,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732368545] [2020-10-23 17:57:15,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 17:57:15,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 17:57:15,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-23 17:57:15,898 INFO L87 Difference]: Start difference. First operand 178 states and 247 transitions. Second operand 23 states. [2020-10-23 17:57:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:19,634 INFO L93 Difference]: Finished difference Result 363 states and 524 transitions. [2020-10-23 17:57:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 17:57:19,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-23 17:57:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:19,641 INFO L225 Difference]: With dead ends: 363 [2020-10-23 17:57:19,641 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 17:57:19,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 17:57:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 17:57:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 180. [2020-10-23 17:57:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 17:57:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2020-10-23 17:57:19,671 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 85 [2020-10-23 17:57:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:19,671 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2020-10-23 17:57:19,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 17:57:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2020-10-23 17:57:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 17:57:19,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:19,674 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:19,888 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -529961317, now seen corresponding path program 2 times [2020-10-23 17:57:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109734536] [2020-10-23 17:57:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 17:57:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-23 17:57:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:20,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109734536] [2020-10-23 17:57:20,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300135222] [2020-10-23 17:57:20,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-23 17:57:20,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-23 17:57:20,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-10-23 17:57:21,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:57:21,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13] total 26 [2020-10-23 17:57:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557992587] [2020-10-23 17:57:21,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:57:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:57:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-23 17:57:21,675 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand 15 states. [2020-10-23 17:57:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:22,825 INFO L93 Difference]: Finished difference Result 233 states and 326 transitions. [2020-10-23 17:57:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 17:57:22,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-10-23 17:57:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:22,829 INFO L225 Difference]: With dead ends: 233 [2020-10-23 17:57:22,829 INFO L226 Difference]: Without dead ends: 219 [2020-10-23 17:57:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 17:57:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-23 17:57:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2020-10-23 17:57:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-23 17:57:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2020-10-23 17:57:22,861 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 86 [2020-10-23 17:57:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:22,861 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2020-10-23 17:57:22,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:57:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2020-10-23 17:57:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 17:57:22,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:22,864 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:23,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-23 17:57:23,079 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1579385559, now seen corresponding path program 1 times [2020-10-23 17:57:23,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:23,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344192760] [2020-10-23 17:57:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 17:57:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-23 17:57:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344192760] [2020-10-23 17:57:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711432312] [2020-10-23 17:57:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 17:57:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:23,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:23,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-23 17:57:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982184176] [2020-10-23 17:57:23,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 17:57:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 17:57:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2020-10-23 17:57:23,651 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand 23 states. [2020-10-23 17:57:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:25,930 INFO L93 Difference]: Finished difference Result 429 states and 648 transitions. [2020-10-23 17:57:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 17:57:25,936 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-23 17:57:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:25,939 INFO L225 Difference]: With dead ends: 429 [2020-10-23 17:57:25,939 INFO L226 Difference]: Without dead ends: 268 [2020-10-23 17:57:25,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 17:57:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-23 17:57:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 208. [2020-10-23 17:57:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-23 17:57:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2020-10-23 17:57:25,977 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 86 [2020-10-23 17:57:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:25,977 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2020-10-23 17:57:25,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 17:57:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2020-10-23 17:57:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 17:57:25,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:25,980 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:26,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-23 17:57:26,196 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1493164662, now seen corresponding path program 1 times [2020-10-23 17:57:26,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:26,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493883520] [2020-10-23 17:57:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-23 17:57:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 17:57:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 17:57:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 118 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493883520] [2020-10-23 17:57:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671279532] [2020-10-23 17:57:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 17:57:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-23 17:57:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336432239] [2020-10-23 17:57:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 17:57:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 17:57:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-23 17:57:27,125 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand 25 states. [2020-10-23 17:57:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:31,196 INFO L93 Difference]: Finished difference Result 421 states and 619 transitions. [2020-10-23 17:57:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 17:57:31,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2020-10-23 17:57:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:31,201 INFO L225 Difference]: With dead ends: 421 [2020-10-23 17:57:31,201 INFO L226 Difference]: Without dead ends: 257 [2020-10-23 17:57:31,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=361, Invalid=1895, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 17:57:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-23 17:57:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 210. [2020-10-23 17:57:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-23 17:57:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2020-10-23 17:57:31,237 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 88 [2020-10-23 17:57:31,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:31,237 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2020-10-23 17:57:31,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 17:57:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2020-10-23 17:57:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 17:57:31,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:31,240 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:31,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:31,454 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1602775770, now seen corresponding path program 2 times [2020-10-23 17:57:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:31,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590226643] [2020-10-23 17:57:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 17:57:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-23 17:57:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-23 17:57:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590226643] [2020-10-23 17:57:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823527860] [2020-10-23 17:57:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:31,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:31,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 17:57:31,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 25 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:32,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:32,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-23 17:57:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43294011] [2020-10-23 17:57:32,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 17:57:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:32,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 17:57:32,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2020-10-23 17:57:32,175 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand 25 states. [2020-10-23 17:57:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:34,673 INFO L93 Difference]: Finished difference Result 445 states and 674 transitions. [2020-10-23 17:57:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 17:57:34,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 89 [2020-10-23 17:57:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:34,678 INFO L225 Difference]: With dead ends: 445 [2020-10-23 17:57:34,678 INFO L226 Difference]: Without dead ends: 281 [2020-10-23 17:57:34,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=760, Invalid=1402, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 17:57:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-23 17:57:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 214. [2020-10-23 17:57:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-23 17:57:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 305 transitions. [2020-10-23 17:57:34,720 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 305 transitions. Word has length 89 [2020-10-23 17:57:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:34,720 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 305 transitions. [2020-10-23 17:57:34,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 17:57:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 305 transitions. [2020-10-23 17:57:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 17:57:34,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:34,723 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:34,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-23 17:57:34,930 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1452842245, now seen corresponding path program 2 times [2020-10-23 17:57:34,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:34,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383082216] [2020-10-23 17:57:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:35,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 17:57:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:35,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 17:57:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:35,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-23 17:57:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383082216] [2020-10-23 17:57:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332921906] [2020-10-23 17:57:35,398 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:35,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:35,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-23 17:57:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 26 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:36,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:36,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-10-23 17:57:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133351437] [2020-10-23 17:57:36,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 17:57:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 17:57:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-23 17:57:36,050 INFO L87 Difference]: Start difference. First operand 214 states and 305 transitions. Second operand 27 states. [2020-10-23 17:57:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:41,527 INFO L93 Difference]: Finished difference Result 434 states and 638 transitions. [2020-10-23 17:57:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 17:57:41,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 91 [2020-10-23 17:57:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:41,532 INFO L225 Difference]: With dead ends: 434 [2020-10-23 17:57:41,532 INFO L226 Difference]: Without dead ends: 267 [2020-10-23 17:57:41,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 17:57:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-23 17:57:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2020-10-23 17:57:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-23 17:57:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 308 transitions. [2020-10-23 17:57:41,595 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 308 transitions. Word has length 91 [2020-10-23 17:57:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:41,595 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 308 transitions. [2020-10-23 17:57:41,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 17:57:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 308 transitions. [2020-10-23 17:57:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 17:57:41,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:41,598 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:41,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:41,803 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1442196599, now seen corresponding path program 3 times [2020-10-23 17:57:41,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:41,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461685566] [2020-10-23 17:57:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:41,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 17:57:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:42,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 17:57:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:42,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 17:57:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461685566] [2020-10-23 17:57:42,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43197730] [2020-10-23 17:57:42,115 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:57:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 17:57:42,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-23 17:57:42,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:42,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-10-23 17:57:42,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196589575] [2020-10-23 17:57:42,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 17:57:42,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 17:57:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-23 17:57:42,537 INFO L87 Difference]: Start difference. First operand 216 states and 308 transitions. Second operand 22 states. [2020-10-23 17:57:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:47,169 INFO L93 Difference]: Finished difference Result 443 states and 668 transitions. [2020-10-23 17:57:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 17:57:47,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 92 [2020-10-23 17:57:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:47,174 INFO L225 Difference]: With dead ends: 443 [2020-10-23 17:57:47,174 INFO L226 Difference]: Without dead ends: 264 [2020-10-23 17:57:47,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 17:57:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-23 17:57:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 204. [2020-10-23 17:57:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-23 17:57:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 280 transitions. [2020-10-23 17:57:47,215 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 280 transitions. Word has length 92 [2020-10-23 17:57:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:47,216 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 280 transitions. [2020-10-23 17:57:47,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 17:57:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 280 transitions. [2020-10-23 17:57:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 17:57:47,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:47,218 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:47,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-23 17:57:47,431 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1870848934, now seen corresponding path program 1 times [2020-10-23 17:57:47,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:47,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681363693] [2020-10-23 17:57:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 17:57:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 17:57:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 17:57:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-23 17:57:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-23 17:57:47,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681363693] [2020-10-23 17:57:47,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257524133] [2020-10-23 17:57:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 17:57:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-23 17:57:47,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:57:47,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-10-23 17:57:47,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252395130] [2020-10-23 17:57:47,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:57:47,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:47,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:57:47,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:57:47,766 INFO L87 Difference]: Start difference. First operand 204 states and 280 transitions. Second operand 4 states. [2020-10-23 17:57:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:47,941 INFO L93 Difference]: Finished difference Result 341 states and 470 transitions. [2020-10-23 17:57:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 17:57:47,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-23 17:57:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:47,945 INFO L225 Difference]: With dead ends: 341 [2020-10-23 17:57:47,945 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 17:57:47,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 17:57:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2020-10-23 17:57:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-23 17:57:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2020-10-23 17:57:47,987 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 95 [2020-10-23 17:57:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:47,988 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2020-10-23 17:57:47,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:57:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2020-10-23 17:57:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-23 17:57:47,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:47,990 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:48,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-23 17:57:48,203 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 532202317, now seen corresponding path program 4 times [2020-10-23 17:57:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:48,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063988204] [2020-10-23 17:57:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:57:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-23 17:57:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-23 17:57:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 4 proven. 175 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-23 17:57:48,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063988204] [2020-10-23 17:57:48,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96319870] [2020-10-23 17:57:48,739 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:48,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 17:57:48,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 17:57:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 17:57:49,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:49,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-10-23 17:57:49,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115940649] [2020-10-23 17:57:49,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 17:57:49,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 17:57:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-10-23 17:57:49,528 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 29 states. [2020-10-23 17:57:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:54,684 INFO L93 Difference]: Finished difference Result 402 states and 542 transitions. [2020-10-23 17:57:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 17:57:54,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 98 [2020-10-23 17:57:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:54,689 INFO L225 Difference]: With dead ends: 402 [2020-10-23 17:57:54,689 INFO L226 Difference]: Without dead ends: 258 [2020-10-23 17:57:54,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=453, Invalid=2627, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 17:57:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-23 17:57:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 196. [2020-10-23 17:57:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-23 17:57:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 263 transitions. [2020-10-23 17:57:54,727 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 263 transitions. Word has length 98 [2020-10-23 17:57:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:54,727 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 263 transitions. [2020-10-23 17:57:54,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 17:57:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 263 transitions. [2020-10-23 17:57:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 17:57:54,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:54,729 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:54,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:54,944 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -710152515, now seen corresponding path program 3 times [2020-10-23 17:57:54,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:54,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098273725] [2020-10-23 17:57:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 17:57:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 17:57:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-23 17:57:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 197 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-23 17:57:55,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098273725] [2020-10-23 17:57:55,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150175795] [2020-10-23 17:57:55,388 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:55,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:57:55,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:57:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-10-23 17:57:55,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:55,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-10-23 17:57:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345578907] [2020-10-23 17:57:55,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 17:57:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 17:57:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-23 17:57:55,921 INFO L87 Difference]: Start difference. First operand 196 states and 263 transitions. Second operand 22 states. [2020-10-23 17:57:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:59,919 INFO L93 Difference]: Finished difference Result 452 states and 677 transitions. [2020-10-23 17:57:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 17:57:59,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-10-23 17:57:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:59,925 INFO L225 Difference]: With dead ends: 452 [2020-10-23 17:57:59,925 INFO L226 Difference]: Without dead ends: 308 [2020-10-23 17:57:59,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 17:57:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-23 17:57:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 231. [2020-10-23 17:57:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-23 17:57:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 322 transitions. [2020-10-23 17:57:59,969 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 322 transitions. Word has length 99 [2020-10-23 17:57:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:59,969 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 322 transitions. [2020-10-23 17:57:59,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 17:57:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 322 transitions. [2020-10-23 17:57:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-23 17:57:59,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:59,971 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:00,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:00,187 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1781618922, now seen corresponding path program 1 times [2020-10-23 17:58:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894852675] [2020-10-23 17:58:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:58:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:58:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 17:58:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 17:58:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-23 17:58:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 4 proven. 209 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:58:00,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894852675] [2020-10-23 17:58:00,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702154203] [2020-10-23 17:58:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-23 17:58:00,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:58:01,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:01,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-10-23 17:58:01,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318524865] [2020-10-23 17:58:01,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 17:58:01,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:01,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 17:58:01,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-10-23 17:58:01,742 INFO L87 Difference]: Start difference. First operand 231 states and 322 transitions. Second operand 31 states. [2020-10-23 17:58:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:08,623 INFO L93 Difference]: Finished difference Result 477 states and 683 transitions. [2020-10-23 17:58:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-23 17:58:08,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-10-23 17:58:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:08,628 INFO L225 Difference]: With dead ends: 477 [2020-10-23 17:58:08,628 INFO L226 Difference]: Without dead ends: 299 [2020-10-23 17:58:08,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=502, Invalid=3038, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 17:58:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-23 17:58:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 233. [2020-10-23 17:58:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-23 17:58:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2020-10-23 17:58:08,673 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 101 [2020-10-23 17:58:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:08,673 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2020-10-23 17:58:08,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 17:58:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2020-10-23 17:58:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 17:58:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:08,675 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:08,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-23 17:58:08,888 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2007751480, now seen corresponding path program 1 times [2020-10-23 17:58:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:08,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920949189] [2020-10-23 17:58:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:58:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:58:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 17:58:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 17:58:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-23 17:58:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 4 proven. 232 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:58:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920949189] [2020-10-23 17:58:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182805432] [2020-10-23 17:58:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 17:58:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 26 proven. 222 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:58:09,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:09,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-10-23 17:58:09,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022967143] [2020-10-23 17:58:09,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 17:58:09,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 17:58:09,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2020-10-23 17:58:09,812 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand 31 states. [2020-10-23 17:58:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:13,563 INFO L93 Difference]: Finished difference Result 513 states and 777 transitions. [2020-10-23 17:58:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 17:58:13,566 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 102 [2020-10-23 17:58:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:13,569 INFO L225 Difference]: With dead ends: 513 [2020-10-23 17:58:13,569 INFO L226 Difference]: Without dead ends: 335 [2020-10-23 17:58:13,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1198, Invalid=2224, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 17:58:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-23 17:58:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 237. [2020-10-23 17:58:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-23 17:58:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2020-10-23 17:58:13,618 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 102 [2020-10-23 17:58:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:13,619 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2020-10-23 17:58:13,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 17:58:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2020-10-23 17:58:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-23 17:58:13,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:13,621 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:13,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:13,835 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1097347865, now seen corresponding path program 2 times [2020-10-23 17:58:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:13,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179344416] [2020-10-23 17:58:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:13,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:13,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:58:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:13,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:58:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:14,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-23 17:58:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-23 17:58:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:14,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-23 17:58:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 4 proven. 245 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:58:14,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179344416] [2020-10-23 17:58:14,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332896291] [2020-10-23 17:58:14,537 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:05:18,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:05:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:05:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:05:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:05:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 27 proven. 234 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 18:05:19,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:05:19,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-10-23 18:05:19,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814729777] [2020-10-23 18:05:19,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 18:05:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:05:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 18:05:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:05:19,765 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand 33 states. [2020-10-23 18:05:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:05:27,927 INFO L93 Difference]: Finished difference Result 490 states and 701 transitions. [2020-10-23 18:05:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 18:05:27,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-10-23 18:05:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:05:27,935 INFO L225 Difference]: With dead ends: 490 [2020-10-23 18:05:27,935 INFO L226 Difference]: Without dead ends: 309 [2020-10-23 18:05:27,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 18:05:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-23 18:05:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 239. [2020-10-23 18:05:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-23 18:05:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2020-10-23 18:05:27,980 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 104 [2020-10-23 18:05:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:05:27,980 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2020-10-23 18:05:27,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 18:05:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2020-10-23 18:05:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:05:27,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:05:27,982 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:05:28,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-23 18:05:28,188 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:05:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:05:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2024782103, now seen corresponding path program 2 times [2020-10-23 18:05:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:05:28,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091231281] [2020-10-23 18:05:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:05:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:05:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:05:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 18:05:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 18:05:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-23 18:05:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-23 18:05:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 270 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 18:05:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091231281] [2020-10-23 18:05:28,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494470568] [2020-10-23 18:05:28,668 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true