/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:35:15,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:35:15,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:35:15,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:35:15,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:35:15,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:35:15,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:35:15,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:35:15,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:35:15,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:35:15,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:35:15,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:35:15,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:35:15,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:35:15,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:35:15,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:35:15,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:35:15,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:35:15,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:35:15,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:35:15,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:35:15,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:35:15,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:35:15,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:35:15,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:35:15,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:35:15,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:35:15,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:35:15,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:35:15,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:35:15,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:35:15,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:35:15,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:35:15,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:35:15,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:35:15,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:35:15,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:35:15,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:35:15,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:35:15,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:35:15,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:35:15,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 19:35:15,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:35:15,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:35:15,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:35:15,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:35:15,816 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:35:15,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:35:15,816 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:35:15,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:35:15,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:35:15,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:35:15,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:35:15,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:35:15,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:35:15,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:35:15,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:35:15,818 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:35:15,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:35:15,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:35:15,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:35:15,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:35:15,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:35:15,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:15,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:35:15,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:35:15,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:35:15,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:35:15,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:35:15,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:35:15,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:35:15,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:35:16,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:35:16,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:35:16,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:35:16,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:35:16,349 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:35:16,350 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-09-24 19:35:16,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01c0f3fc4/3cf633443f014e1094a951d7dfddd4a4/FLAGa76296cf3 [2020-09-24 19:35:17,006 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:35:17,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-09-24 19:35:17,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01c0f3fc4/3cf633443f014e1094a951d7dfddd4a4/FLAGa76296cf3 [2020-09-24 19:35:17,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01c0f3fc4/3cf633443f014e1094a951d7dfddd4a4 [2020-09-24 19:35:17,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:35:17,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:35:17,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:17,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:35:17,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:35:17,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4717b3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17, skipping insertion in model container [2020-09-24 19:35:17,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:35:17,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:35:17,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:17,627 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:35:17,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:17,663 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:35:17,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17 WrapperNode [2020-09-24 19:35:17,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:17,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:35:17,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:35:17,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:35:17,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... [2020-09-24 19:35:17,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:35:17,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:35:17,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:35:17,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:35:17,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 19:35:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:35:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:35:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:35:17,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:35:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:35:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:35:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:35:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:35:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:35:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:35:18,141 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:35:18,142 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:35:18,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:18 BoogieIcfgContainer [2020-09-24 19:35:18,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:35:18,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:35:18,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:35:18,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:35:18,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:35:17" (1/3) ... [2020-09-24 19:35:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f71d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:18, skipping insertion in model container [2020-09-24 19:35:18,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:17" (2/3) ... [2020-09-24 19:35:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f71d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:18, skipping insertion in model container [2020-09-24 19:35:18,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:18" (3/3) ... [2020-09-24 19:35:18,159 INFO L109 eAbstractionObserver]: Analyzing ICFG mod3.c [2020-09-24 19:35:18,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:35:18,188 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:35:18,236 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:35:18,281 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:35:18,281 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:35:18,281 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:35:18,282 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:35:18,282 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:35:18,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:35:18,282 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:35:18,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:35:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-24 19:35:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 19:35:18,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:18,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:18,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1436140310, now seen corresponding path program 1 times [2020-09-24 19:35:18,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:18,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137354332] [2020-09-24 19:35:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 19:35:18,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:18,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-24 19:35:18,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:18,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 19:35:18,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:18,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:35:18,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:35:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:18,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137354332] [2020-09-24 19:35:18,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:18,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 19:35:18,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946877018] [2020-09-24 19:35:18,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 19:35:18,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:18,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 19:35:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:35:18,658 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-24 19:35:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:18,685 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 19:35:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 19:35:18,686 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 19:35:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:18,697 INFO L225 Difference]: With dead ends: 50 [2020-09-24 19:35:18,698 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 19:35:18,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:35:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 19:35:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 19:35:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 19:35:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-24 19:35:18,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 12 [2020-09-24 19:35:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:18,749 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-24 19:35:18,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 19:35:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-24 19:35:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 19:35:18,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:18,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:18,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:35:18,752 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1309792647, now seen corresponding path program 1 times [2020-09-24 19:35:18,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:18,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709023596] [2020-09-24 19:35:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 19:35:18,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:18,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 19:35:18,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:35:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:35:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:35:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:18,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:18,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:35:18,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:18,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:18,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:18,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:18,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709023596] [2020-09-24 19:35:18,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:18,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:35:18,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359512579] [2020-09-24 19:35:18,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:35:18,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:18,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:35:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:35:18,935 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 3 states. [2020-09-24 19:35:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:18,965 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-09-24 19:35:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:35:18,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-24 19:35:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:18,968 INFO L225 Difference]: With dead ends: 54 [2020-09-24 19:35:18,968 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 19:35:18,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:35:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 19:35:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2020-09-24 19:35:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 19:35:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-24 19:35:18,978 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 14 [2020-09-24 19:35:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:18,979 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-24 19:35:18,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:35:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-24 19:35:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 19:35:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:18,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:18,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:35:18,981 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1704587139, now seen corresponding path program 1 times [2020-09-24 19:35:18,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:18,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969827332] [2020-09-24 19:35:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:19,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:19,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 19:35:19,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:19,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-09-24 19:35:19,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:35:19,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:35:19,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:19,807 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 21 [2020-09-24 19:35:19,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:19,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:19,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:19,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:19,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:19,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:19,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:19,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:19,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969827332] [2020-09-24 19:35:19,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:19,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:35:19,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059668641] [2020-09-24 19:35:19,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:19,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:19,947 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-09-24 19:35:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:26,341 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-09-24 19:35:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:26,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-24 19:35:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:26,343 INFO L225 Difference]: With dead ends: 74 [2020-09-24 19:35:26,343 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 19:35:26,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 19:35:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-09-24 19:35:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 19:35:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-09-24 19:35:26,351 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 20 [2020-09-24 19:35:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:26,352 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-09-24 19:35:26,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-09-24 19:35:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 19:35:26,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:26,354 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:26,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:35:26,354 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:26,355 INFO L82 PathProgramCache]: Analyzing trace with hash -110349398, now seen corresponding path program 1 times [2020-09-24 19:35:26,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:26,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190844256] [2020-09-24 19:35:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:26,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:26,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 19:35:26,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-09-24 19:35:26,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 19:35:26,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:35:26,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:26,935 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 18 [2020-09-24 19:35:27,122 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-09-24 19:35:27,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:27,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:27,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:27,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190844256] [2020-09-24 19:35:27,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:27,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:35:27,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485393854] [2020-09-24 19:35:27,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:27,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:27,161 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 6 states. [2020-09-24 19:35:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:29,456 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-09-24 19:35:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:29,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-24 19:35:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:29,457 INFO L225 Difference]: With dead ends: 75 [2020-09-24 19:35:29,457 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 19:35:29,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 19:35:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 19:35:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 19:35:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 19:35:29,460 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-09-24 19:35:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:29,460 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 19:35:29,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 19:35:29,460 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 19:35:29,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:35:29,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 19:35:29,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 19:35:29,592 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:35:29,592 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:35:29,592 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 19:35:29,592 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 19:35:29,592 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 19:35:29,593 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (= (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* .cse0 4294967296) (* .cse1 3) (* (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296) 4294967296))))) main_~x~0) [2020-09-24 19:35:29,593 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 33) no Hoare annotation was computed. [2020-09-24 19:35:29,593 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 19:35:29,593 INFO L268 CegarLoopResult]: For program point L23-1(lines 23 26) no Hoare annotation was computed. [2020-09-24 19:35:29,593 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 19:35:29,594 INFO L268 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-09-24 19:35:29,594 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-09-24 19:35:29,594 INFO L268 CegarLoopResult]: For program point L23-4(line 23) no Hoare annotation was computed. [2020-09-24 19:35:29,594 INFO L264 CegarLoopResult]: At program point L23-5(lines 16 29) the Hoare annotation is: (or (= (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* .cse0 4294967296) (* .cse1 3) (* (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296) 4294967296))))) main_~x~0) (and (<= (div main_~y~0 4294967296) 0) (<= 1 main_~y~0))) [2020-09-24 19:35:29,594 INFO L268 CegarLoopResult]: For program point L17(lines 17 28) no Hoare annotation was computed. [2020-09-24 19:35:29,594 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 33) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L30(lines 30 31) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 33) the Hoare annotation is: true [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-24 19:35:29,595 INFO L268 CegarLoopResult]: For program point L20(lines 20 27) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L16-1(lines 16 29) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L16-4(line 16) no Hoare annotation was computed. [2020-09-24 19:35:29,596 INFO L268 CegarLoopResult]: For program point L16-5(lines 12 33) no Hoare annotation was computed. [2020-09-24 19:35:29,597 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 10) the Hoare annotation is: true [2020-09-24 19:35:29,597 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 10) no Hoare annotation was computed. [2020-09-24 19:35:29,597 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 19:35:29,597 INFO L268 CegarLoopResult]: For program point L7(lines 7 8) no Hoare annotation was computed. [2020-09-24 19:35:29,597 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 10) no Hoare annotation was computed. [2020-09-24 19:35:29,597 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 19:35:29,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:35:29 BoogieIcfgContainer [2020-09-24 19:35:29,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:35:29,622 INFO L168 Benchmark]: Toolchain (without parser) took 12272.95 ms. Allocated memory was 147.8 MB in the beginning and 243.8 MB in the end (delta: 95.9 MB). Free memory was 104.5 MB in the beginning and 186.8 MB in the end (delta: -82.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:29,623 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:35:29,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.63 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:29,626 INFO L168 Benchmark]: Boogie Preprocessor took 124.83 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.3 MB in the beginning and 182.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:29,627 INFO L168 Benchmark]: RCFGBuilder took 358.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:29,628 INFO L168 Benchmark]: TraceAbstraction took 11469.75 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 168.4 MB in the beginning and 186.8 MB in the end (delta: -18.4 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:29,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.63 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.83 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.3 MB in the beginning and 182.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11469.75 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 168.4 MB in the beginning and 186.8 MB in the end (delta: -18.4 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x / 4294967296 * 4294967296 + (x + x / 4294967296 * -4294967296) / 3 * 3 + (x + x / 4294967296 * -4294967296 + (x + x / 4294967296 * -4294967296) / 3 * -3) / 4294967296 * 4294967296 == x || (y / 4294967296 <= 0 && 1 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 150 SDtfs, 35 SDslu, 275 SDs, 0 SdLazy, 83 SolverSat, 8 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 17 NumberOfFragments, 97 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 83 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 13477 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...