/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:07,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:07,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:07,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:07,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:07,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:07,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:07,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:07,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:07,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:07,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:07,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:07,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:07,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:07,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:07,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:07,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:07,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:07,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:07,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:07,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:07,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:07,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:07,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:07,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:07,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:41:07,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:41:07,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:41:07,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:41:07,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:41:07,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:41:07,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:41:07,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:41:07,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:07,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:07,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:07,411 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 [2019-11-06 18:41:07,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:07,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:07,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:07,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:07,427 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:07,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:07,428 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:07,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:07,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:07,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:07,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:07,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:07,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:07,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:07,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:07,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:07,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:07,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:07,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:07,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:07,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:07,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:07,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:07,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:07,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:07,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:07,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:07,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:07,729 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:07,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-11-06 18:41:07,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14be9df0a/e4a6328c866c4ee292d572d0327ccfdd/FLAG83f3d5794 [2019-11-06 18:41:08,262 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:08,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-11-06 18:41:08,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14be9df0a/e4a6328c866c4ee292d572d0327ccfdd/FLAG83f3d5794 [2019-11-06 18:41:08,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14be9df0a/e4a6328c866c4ee292d572d0327ccfdd [2019-11-06 18:41:08,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:08,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:08,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:08,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:08,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:08,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:08,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a388efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08, skipping insertion in model container [2019-11-06 18:41:08,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:08,652 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:08,668 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:08,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:08,858 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:08,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:08,900 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:08,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08 WrapperNode [2019-11-06 18:41:08,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:08,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:08,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:08,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:09,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (1/1) ... [2019-11-06 18:41:09,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:09,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:09,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:09,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:09,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (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 [2019-11-06 18:41:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:09,430 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:09,431 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:41:09,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:09 BoogieIcfgContainer [2019-11-06 18:41:09,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:09,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:09,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:09,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:09,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:08" (1/3) ... [2019-11-06 18:41:09,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d90c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:09, skipping insertion in model container [2019-11-06 18:41:09,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:08" (2/3) ... [2019-11-06 18:41:09,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d90c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:09, skipping insertion in model container [2019-11-06 18:41:09,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:09" (3/3) ... [2019-11-06 18:41:09,440 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2019-11-06 18:41:09,450 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:09,457 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:09,468 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:09,495 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:09,496 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:09,496 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:09,496 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:09,496 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:09,496 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:09,496 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:09,496 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 18:41:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:41:09,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:09,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:09,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2019-11-06 18:41:09,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:09,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114065961] [2019-11-06 18:41:09,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:41:09,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114065961] [2019-11-06 18:41:09,732 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:09,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:09,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576758083] [2019-11-06 18:41:09,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:09,739 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:09,756 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-06 18:41:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:09,890 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-11-06 18:41:09,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:09,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-06 18:41:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:09,903 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:41:09,903 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:41:09,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:41:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:41:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:41:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:41:09,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-06 18:41:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:09,970 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:41:09,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:41:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:41:09,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:09,974 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:09,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:09,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2019-11-06 18:41:09,976 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:09,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170991705] [2019-11-06 18:41:09,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:41:10,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170991705] [2019-11-06 18:41:10,081 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:10,081 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:10,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299757054] [2019-11-06 18:41:10,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:10,083 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:10,084 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-11-06 18:41:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:10,213 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-06 18:41:10,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:10,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:41:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:10,216 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:41:10,216 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:41:10,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:41:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:41:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:41:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:41:10,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2019-11-06 18:41:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:10,231 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:41:10,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:41:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:41:10,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:10,234 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:10,235 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2019-11-06 18:41:10,237 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:10,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953346516] [2019-11-06 18:41:10,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:41:10,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953346516] [2019-11-06 18:41:10,320 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:10,320 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:10,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431570139] [2019-11-06 18:41:10,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:10,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:10,322 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2019-11-06 18:41:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:10,426 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2019-11-06 18:41:10,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:10,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:41:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:10,428 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:41:10,429 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:41:10,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:41:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-11-06 18:41:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:41:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-06 18:41:10,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2019-11-06 18:41:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:10,437 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-06 18:41:10,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-06 18:41:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:41:10,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:10,439 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:10,439 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2019-11-06 18:41:10,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:10,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865592877] [2019-11-06 18:41:10,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:41:10,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865592877] [2019-11-06 18:41:10,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113528944] [2019-11-06 18:41:10,544 INFO L94 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 [2019-11-06 18:41:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:10,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:10,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:41:10,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:10,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:10,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174236050] [2019-11-06 18:41:10,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:10,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:10,662 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-11-06 18:41:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:10,752 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:41:10,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:10,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-06 18:41:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:10,754 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:41:10,754 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:41:10,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:41:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-06 18:41:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:41:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-06 18:41:10,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2019-11-06 18:41:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:10,762 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-06 18:41:10,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-06 18:41:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:41:10,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:10,763 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:10,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:10,975 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1956939620, now seen corresponding path program 2 times [2019-11-06 18:41:10,977 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:10,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061095912] [2019-11-06 18:41:10,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:41:11,108 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061095912] [2019-11-06 18:41:11,108 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194970873] [2019-11-06 18:41:11,109 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:11,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:11,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:11,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:11,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:41:11,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:11,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:11,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012498184] [2019-11-06 18:41:11,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:11,179 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:11,180 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2019-11-06 18:41:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:11,275 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2019-11-06 18:41:11,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:11,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-06 18:41:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:11,277 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:41:11,277 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:41:11,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:41:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-06 18:41:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:41:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-06 18:41:11,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2019-11-06 18:41:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:11,285 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-06 18:41:11,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-06 18:41:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:41:11,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:11,286 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:11,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:11,492 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1423302462, now seen corresponding path program 3 times [2019-11-06 18:41:11,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:11,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651668303] [2019-11-06 18:41:11,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:41:11,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651668303] [2019-11-06 18:41:11,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863315410] [2019-11-06 18:41:11,578 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:41:11,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:41:11,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:11,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:11,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:41:11,655 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:11,655 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:41:11,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460602531] [2019-11-06 18:41:11,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:41:11,656 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:41:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:11,657 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2019-11-06 18:41:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:11,773 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-11-06 18:41:11,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:41:11,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-06 18:41:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:11,774 INFO L225 Difference]: With dead ends: 72 [2019-11-06 18:41:11,775 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:41:11,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:41:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-06 18:41:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:41:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-06 18:41:11,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2019-11-06 18:41:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:11,782 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-06 18:41:11,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:41:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-06 18:41:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:41:11,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:11,784 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:11,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:11,988 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -808703080, now seen corresponding path program 4 times [2019-11-06 18:41:11,989 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:11,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620063062] [2019-11-06 18:41:11,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 18:41:12,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620063062] [2019-11-06 18:41:12,117 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693732642] [2019-11-06 18:41:12,118 INFO L92 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 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 [2019-11-06 18:41:12,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:12,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:12,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:12,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:41:12,230 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:12,231 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:41:12,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367122017] [2019-11-06 18:41:12,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:41:12,232 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:41:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:41:12,233 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2019-11-06 18:41:12,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:12,445 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2019-11-06 18:41:12,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:41:12,446 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-06 18:41:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:12,447 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:41:12,447 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:41:12,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:41:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:41:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-11-06 18:41:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:41:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-06 18:41:12,462 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2019-11-06 18:41:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:12,464 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-06 18:41:12,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:41:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-06 18:41:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:41:12,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:12,466 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:12,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:12,667 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1392108432, now seen corresponding path program 5 times [2019-11-06 18:41:12,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:12,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124007375] [2019-11-06 18:41:12,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 18:41:12,796 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124007375] [2019-11-06 18:41:12,796 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727398706] [2019-11-06 18:41:12,796 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:14,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:41:14,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:14,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:14,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:41:14,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:14,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-06 18:41:14,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140787082] [2019-11-06 18:41:14,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:14,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:14,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:14,344 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 12 states. [2019-11-06 18:41:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:14,542 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2019-11-06 18:41:14,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:14,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-06 18:41:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:14,544 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:41:14,544 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:41:14,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:41:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-11-06 18:41:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:41:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-06 18:41:14,560 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 49 [2019-11-06 18:41:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:14,560 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-06 18:41:14,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-06 18:41:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:41:14,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:14,566 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:14,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:14,784 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -846363768, now seen corresponding path program 6 times [2019-11-06 18:41:14,785 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:14,786 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008332283] [2019-11-06 18:41:14,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 18:41:14,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008332283] [2019-11-06 18:41:14,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999262302] [2019-11-06 18:41:14,917 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:41:15,035 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:41:15,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:15,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:41:15,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:41:15,128 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:15,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-06 18:41:15,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630920462] [2019-11-06 18:41:15,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:41:15,130 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:15,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:41:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:15,131 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 14 states. [2019-11-06 18:41:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:15,348 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2019-11-06 18:41:15,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:41:15,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-06 18:41:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:15,350 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:41:15,350 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:41:15,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:41:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2019-11-06 18:41:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:41:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-06 18:41:15,364 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 57 [2019-11-06 18:41:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:15,364 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-06 18:41:15,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:41:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-06 18:41:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:41:15,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:15,365 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:15,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:15,566 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 510593920, now seen corresponding path program 7 times [2019-11-06 18:41:15,567 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:15,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298818414] [2019-11-06 18:41:15,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 18:41:15,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298818414] [2019-11-06 18:41:15,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486630014] [2019-11-06 18:41:15,737 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:15,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:41:15,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 18:41:15,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:15,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-11-06 18:41:15,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689447715] [2019-11-06 18:41:15,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:41:15,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:41:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:41:15,964 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 16 states. [2019-11-06 18:41:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:16,162 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2019-11-06 18:41:16,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:41:16,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-06 18:41:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:16,163 INFO L225 Difference]: With dead ends: 135 [2019-11-06 18:41:16,163 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:41:16,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:41:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:41:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-11-06 18:41:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:41:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-06 18:41:16,176 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 65 [2019-11-06 18:41:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:16,179 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-06 18:41:16,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:41:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-06 18:41:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:41:16,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:16,180 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:16,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:16,386 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 780565368, now seen corresponding path program 8 times [2019-11-06 18:41:16,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:16,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850537562] [2019-11-06 18:41:16,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-06 18:41:16,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850537562] [2019-11-06 18:41:16,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766387479] [2019-11-06 18:41:16,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:16,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:16,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:16,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:41:16,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:41:16,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:16,692 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-06 18:41:16,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31397964] [2019-11-06 18:41:16,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:41:16,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:41:16,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:16,694 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 18 states. [2019-11-06 18:41:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:16,938 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2019-11-06 18:41:16,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:41:16,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2019-11-06 18:41:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:16,940 INFO L225 Difference]: With dead ends: 149 [2019-11-06 18:41:16,940 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:41:16,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:41:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-11-06 18:41:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:41:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-06 18:41:16,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 73 [2019-11-06 18:41:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:16,949 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-06 18:41:16,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:41:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-06 18:41:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:41:16,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:16,951 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:17,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:17,165 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash -256126096, now seen corresponding path program 9 times [2019-11-06 18:41:17,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:17,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507090691] [2019-11-06 18:41:17,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-06 18:41:17,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507090691] [2019-11-06 18:41:17,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880462187] [2019-11-06 18:41:17,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:21,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:41:21,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:21,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:41:21,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:41:21,621 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:21,622 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-11-06 18:41:21,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45800432] [2019-11-06 18:41:21,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:41:21,623 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:41:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:41:21,623 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 20 states. [2019-11-06 18:41:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,902 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2019-11-06 18:41:21,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:41:21,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-06 18:41:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,904 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:41:21,904 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:41:21,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:41:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:41:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2019-11-06 18:41:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 18:41:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-11-06 18:41:21,912 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2019-11-06 18:41:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,912 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-11-06 18:41:21,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:41:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-11-06 18:41:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:41:21,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,914 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:22,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,122 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1643582312, now seen corresponding path program 10 times [2019-11-06 18:41:22,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:22,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786173090] [2019-11-06 18:41:22,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-11-06 18:41:22,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786173090] [2019-11-06 18:41:22,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541565802] [2019-11-06 18:41:22,262 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:22,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:22,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:41:22,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-06 18:41:22,554 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:22,554 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:41:22,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780809903] [2019-11-06 18:41:22,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:41:22,556 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:41:22,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:22,557 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 22 states. [2019-11-06 18:41:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:22,873 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2019-11-06 18:41:22,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:41:22,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-11-06 18:41:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:22,874 INFO L225 Difference]: With dead ends: 177 [2019-11-06 18:41:22,874 INFO L226 Difference]: Without dead ends: 106 [2019-11-06 18:41:22,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-06 18:41:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2019-11-06 18:41:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:41:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2019-11-06 18:41:22,888 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 89 [2019-11-06 18:41:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:22,888 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2019-11-06 18:41:22,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:41:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2019-11-06 18:41:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:41:22,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:22,891 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:23,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:23,098 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:23,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1994376352, now seen corresponding path program 11 times [2019-11-06 18:41:23,099 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:23,099 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129733979] [2019-11-06 18:41:23,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-06 18:41:23,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129733979] [2019-11-06 18:41:23,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652532557] [2019-11-06 18:41:23,228 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true