/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 SequenceOfStatements --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:40:49,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:40:49,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:40:49,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:40:49,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:40:49,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:40:49,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:40:49,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:40:49,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:40:49,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:40:49,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:40:49,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:40:49,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:40:49,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:40:49,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:40:49,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:40:49,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:40:49,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:40:49,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:40:49,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:40:49,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:40:49,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:40:49,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:40:49,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:40:49,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:40:49,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:40:49,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:40:49,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:40:49,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:40:49,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:40:49,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:40:49,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:40:49,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:40:49,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:40:49,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:40:49,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:40:49,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:40:49,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:40:49,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:40:49,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:40:49,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:40:49,824 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 [2020-10-27 01:40:49,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:40:49,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:40:49,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:40:49,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:40:49,854 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:40:49,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:40:49,854 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:40:49,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:40:49,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:40:49,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:40:49,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:40:49,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:40:49,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:40:49,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:40:49,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:40:49,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:40:49,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:40:49,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:40:49,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:40:49,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:40:49,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:40:49,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:49,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:40:49,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:40:49,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:40:49,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:40:49,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:40:49,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:40:49,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:40:49,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:40:50,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:40:50,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:40:50,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:40:50,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:40:50,256 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:40:50,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-27 01:40:50,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac7c124ac/164a8dcd12064694ac340878c6a5320c/FLAG017877c70 [2020-10-27 01:40:51,004 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:40:51,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-27 01:40:51,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac7c124ac/164a8dcd12064694ac340878c6a5320c/FLAG017877c70 [2020-10-27 01:40:51,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac7c124ac/164a8dcd12064694ac340878c6a5320c [2020-10-27 01:40:51,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:40:51,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:40:51,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:51,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:40:51,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:40:51,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d630ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51, skipping insertion in model container [2020-10-27 01:40:51,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:40:51,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:40:51,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:51,608 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:40:51,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:51,643 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:40:51,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51 WrapperNode [2020-10-27 01:40:51,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:51,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:40:51,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:40:51,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:40:51,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (1/1) ... [2020-10-27 01:40:51,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:40:51,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:40:51,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:40:51,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:40:51,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (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 [2020-10-27 01:40:51,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:40:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:40:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:40:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:40:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:40:51,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:40:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:40:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:40:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:40:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:40:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:40:52,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:40:52,071 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:40:52,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:52 BoogieIcfgContainer [2020-10-27 01:40:52,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:40:52,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:40:52,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:40:52,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:40:52,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:40:51" (1/3) ... [2020-10-27 01:40:52,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13184f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:52, skipping insertion in model container [2020-10-27 01:40:52,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:51" (2/3) ... [2020-10-27 01:40:52,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13184f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:52, skipping insertion in model container [2020-10-27 01:40:52,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:52" (3/3) ... [2020-10-27 01:40:52,088 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-10-27 01:40:52,122 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:40:52,137 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:40:52,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:40:52,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:40:52,230 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:40:52,230 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:40:52,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:40:52,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:40:52,231 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:40:52,231 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:40:52,231 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:40:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 01:40:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:40:52,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:52,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:52,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2013076175, now seen corresponding path program 1 times [2020-10-27 01:40:52,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:52,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417400494] [2020-10-27 01:40:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:53,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:40:53,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:53,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 01:40:53,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:40:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:40:53,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:40:53,268 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2020-10-27 01:40:53,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:53,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:53,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:40:53,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:53,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:53,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417400494] [2020-10-27 01:40:53,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:53,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:40:53,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781544704] [2020-10-27 01:40:53,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:40:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:40:53,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:40:53,463 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-10-27 01:40:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:53,764 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-10-27 01:40:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:40:53,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 01:40:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:53,774 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:40:53,774 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:40:53,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:40:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:40:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:40:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:40:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:40:53,822 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 01:40:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:53,822 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:40:53,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:40:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:40:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:40:53,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:53,824 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:53,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:40:53,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1289977208, now seen corresponding path program 1 times [2020-10-27 01:40:53,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:53,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279662914] [2020-10-27 01:40:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:53,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:53,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:40:53,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:53,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 01:40:53,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:53,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:53,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:40:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:40:54,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:54,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279662914] [2020-10-27 01:40:54,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:54,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:40:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557229939] [2020-10-27 01:40:54,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:40:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:40:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:40:54,207 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-27 01:40:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:54,580 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 01:40:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:40:54,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 01:40:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:54,581 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:40:54,582 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:40:54,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:40:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:40:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-27 01:40:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:40:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 01:40:54,590 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-10-27 01:40:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:54,591 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 01:40:54,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:40:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 01:40:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:40:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:54,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:54,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:40:54,593 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash 703171194, now seen corresponding path program 1 times [2020-10-27 01:40:54,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:54,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112344939] [2020-10-27 01:40:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:40:54,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:54,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 01:40:54,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:40:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:40:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:54,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:54,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112344939] [2020-10-27 01:40:54,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:54,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:40:54,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141362555] [2020-10-27 01:40:54,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:40:54,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:40:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:40:54,776 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-27 01:40:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:54,894 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-27 01:40:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:40:54,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 01:40:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:54,897 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:40:54,898 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:40:54,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:40:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:40:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-10-27 01:40:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:40:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 01:40:54,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2020-10-27 01:40:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:54,906 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 01:40:54,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:40:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 01:40:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:40:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:54,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:54,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:40:54,907 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash 310144184, now seen corresponding path program 1 times [2020-10-27 01:40:54,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:54,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46276510] [2020-10-27 01:40:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:40:54,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:40:54,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:40:54,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:40:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46276510] [2020-10-27 01:40:54,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:54,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:40:54,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377047953] [2020-10-27 01:40:54,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:40:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:40:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:40:54,995 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-10-27 01:40:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:55,050 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-27 01:40:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:40:55,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 01:40:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:55,051 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:40:55,052 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:40:55,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:40:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:40:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:40:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:40:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 01:40:55,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-27 01:40:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:55,058 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 01:40:55,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:40:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 01:40:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:40:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:55,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:55,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:40:55,060 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1478904932, now seen corresponding path program 2 times [2020-10-27 01:40:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328700044] [2020-10-27 01:40:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:55,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:40:55,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:55,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 01:40:55,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:55,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:55,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:55,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:40:55,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:55,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:55,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:55,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:55,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:55,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:55,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:55,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:55,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:55,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:55,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:55,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328700044] [2020-10-27 01:40:55,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:55,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388794578] [2020-10-27 01:40:55,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:55,524 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-10-27 01:40:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:55,993 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:40:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:55,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-27 01:40:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:55,994 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:40:55,994 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:40:55,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:40:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 01:40:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:40:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 01:40:56,001 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2020-10-27 01:40:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:56,001 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 01:40:56,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 01:40:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:40:56,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:56,003 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:56,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:40:56,003 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash 892098918, now seen corresponding path program 1 times [2020-10-27 01:40:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:56,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544230649] [2020-10-27 01:40:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:40:56,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:56,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 01:40:56,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:40:56,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:56,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:40:56,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:56,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:40:56,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544230649] [2020-10-27 01:40:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:40:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734263816] [2020-10-27 01:40:56,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:40:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:40:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:40:56,243 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-27 01:40:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:56,382 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 01:40:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:40:56,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:40:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:56,384 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:40:56,385 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:40:56,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:40:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:40:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:40:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:40:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:40:56,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-10-27 01:40:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:56,397 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:40:56,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:40:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:40:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:40:56,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:56,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:56,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:40:56,400 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -877394440, now seen corresponding path program 3 times [2020-10-27 01:40:56,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:56,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776481881] [2020-10-27 01:40:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:40:56,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 01:40:56,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:40:56,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:56,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:40:56,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:57,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:57,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:57,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:57,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776481881] [2020-10-27 01:40:57,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:57,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:40:57,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897349552] [2020-10-27 01:40:57,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:40:57,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:40:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:40:57,191 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-10-27 01:41:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:00,177 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 01:41:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:00,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 01:41:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:00,178 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:41:00,178 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:41:00,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:41:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:41:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:41:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 01:41:00,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-10-27 01:41:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:00,185 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 01:41:00,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 01:41:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:41:00,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:00,186 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:00,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:41:00,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -446499868, now seen corresponding path program 4 times [2020-10-27 01:41:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429343712] [2020-10-27 01:41:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:41:00,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:00,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:41:00,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:01,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:01,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:01,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:01,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:01,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429343712] [2020-10-27 01:41:01,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:01,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:41:01,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453766437] [2020-10-27 01:41:01,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:41:01,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:41:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:41:01,097 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 14 states. [2020-10-27 01:41:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:02,045 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:41:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:41:02,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-27 01:41:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:02,046 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:02,046 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:41:02,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:41:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:41:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:41:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:41:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:41:02,052 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2020-10-27 01:41:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:02,053 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:41:02,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:41:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:41:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:02,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:02,054 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:02,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:41:02,054 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1323553160, now seen corresponding path program 5 times [2020-10-27 01:41:02,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:02,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997548594] [2020-10-27 01:41:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:02,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:02,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:02,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:03,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:03,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:03,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:03,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:03,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:41:03,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:03,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:03,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997548594] [2020-10-27 01:41:03,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:03,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:41:03,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694924790] [2020-10-27 01:41:03,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:41:03,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:03,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:41:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:41:03,034 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 16 states. [2020-10-27 01:41:03,315 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 01:41:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:06,415 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-27 01:41:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:41:06,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 01:41:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:06,417 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:41:06,417 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:41:06,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:41:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:41:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:41:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 01:41:06,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2020-10-27 01:41:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:06,424 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 01:41:06,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:41:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 01:41:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:41:06,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:06,426 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:06,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:41:06,426 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 962853732, now seen corresponding path program 6 times [2020-10-27 01:41:06,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:06,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204518162] [2020-10-27 01:41:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:41:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:07,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:07,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:07,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:07,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:07,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:07,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204518162] [2020-10-27 01:41:07,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:07,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:41:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332729652] [2020-10-27 01:41:07,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:41:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:41:07,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:41:07,576 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-10-27 01:41:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:08,989 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:41:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:41:08,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-27 01:41:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:08,991 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:41:08,991 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:41:08,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:41:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:41:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:41:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:41:08,998 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2020-10-27 01:41:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:08,998 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:41:08,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:41:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:41:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:41:09,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:09,000 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:09,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:41:09,000 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1424226040, now seen corresponding path program 7 times [2020-10-27 01:41:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:09,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266221858] [2020-10-27 01:41:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:09,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:09,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:41:09,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:41:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:10,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:10,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:10,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:10,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266221858] [2020-10-27 01:41:10,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:41:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63626721] [2020-10-27 01:41:10,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:41:10,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:41:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:10,890 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 20 states. [2020-10-27 01:41:11,194 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 57 [2020-10-27 01:41:11,380 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-10-27 01:41:12,469 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 53 [2020-10-27 01:41:12,671 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 54 [2020-10-27 01:41:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:12,828 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:41:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:41:12,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-27 01:41:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:12,829 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:41:12,829 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:41:12,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:41:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:41:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:41:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:41:12,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-27 01:41:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:12,831 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:41:12,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:41:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:41:12,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:41:12,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:41:12,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:41:13,058 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-27 01:41:13,058 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-27 01:41:13,058 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-27 01:41:13,058 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-27 01:41:13,058 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-27 01:41:13,059 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:41:13,059 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-27 01:41:13,059 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:41:13,059 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:41:13,059 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:41:13,059 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:41:13,059 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 49) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse2 (div main_~a~0 4294967296)) (.cse3 (div main_~b~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3)) (.cse0 (+ (* 4294967296 .cse2) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= (+ .cse1 main_~a~0) .cse0) (<= .cse2 .cse3)))) [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 49) no Hoare annotation was computed. [2020-10-27 01:41:13,060 INFO L274 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 49) the Hoare annotation is: true [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L35(lines 35 44) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-27 01:41:13,061 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 01:41:13,061 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-27 01:41:13,062 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-27 01:41:13,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:41:13 BoogieIcfgContainer [2020-10-27 01:41:13,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:41:13,069 INFO L168 Benchmark]: Toolchain (without parser) took 21707.67 ms. Allocated memory was 160.4 MB in the beginning and 292.6 MB in the end (delta: 132.1 MB). Free memory was 114.4 MB in the beginning and 229.0 MB in the end (delta: -114.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:41:13,074 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory was 130.9 MB in the beginning and 130.9 MB in the end (delta: 91.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:41:13,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.35 ms. Allocated memory is still 160.4 MB. Free memory was 113.8 MB in the beginning and 104.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:41:13,076 INFO L168 Benchmark]: Boogie Preprocessor took 55.81 ms. Allocated memory is still 160.4 MB. Free memory was 104.3 MB in the beginning and 142.8 MB in the end (delta: -38.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:41:13,077 INFO L168 Benchmark]: RCFGBuilder took 373.01 ms. Allocated memory is still 160.4 MB. Free memory was 142.8 MB in the beginning and 128.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:41:13,084 INFO L168 Benchmark]: TraceAbstraction took 20990.27 ms. Allocated memory was 160.4 MB in the beginning and 292.6 MB in the end (delta: 132.1 MB). Free memory was 128.1 MB in the beginning and 229.0 MB in the end (delta: -101.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:41:13,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory was 130.9 MB in the beginning and 130.9 MB in the end (delta: 91.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.35 ms. Allocated memory is still 160.4 MB. Free memory was 113.8 MB in the beginning and 104.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.81 ms. Allocated memory is still 160.4 MB. Free memory was 104.3 MB in the beginning and 142.8 MB in the end (delta: -38.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 373.01 ms. Allocated memory is still 160.4 MB. Free memory was 142.8 MB in the beginning and 128.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20990.27 ms. Allocated memory was 160.4 MB in the beginning and 292.6 MB in the end (delta: 132.1 MB). Free memory was 128.1 MB in the beginning and 229.0 MB in the end (delta: -101.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.6s, OverallIterations: 11, TraceHistogramMax: 8, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 260 SDslu, 508 SDs, 0 SdLazy, 1513 SolverSat, 108 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 204 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=10, 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, 11 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 40 PreInvPairs, 45 NumberOfFragments, 72 HoareAnnotationTreeSize, 40 FomulaSimplifications, 372 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 281 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 271 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 110602 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 11/235 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...