/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=BIGGEST --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 -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:43:05,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:43:05,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:43:05,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:43:05,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:43:05,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:43:05,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:43:05,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:43:05,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:43:05,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:43:05,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:43:05,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:43:05,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:43:05,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:43:05,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:43:05,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:43:05,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:43:05,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:43:05,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:43:05,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:43:05,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:43:05,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:43:05,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:43:05,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:43:05,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:43:05,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:43:05,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:43:05,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:43:05,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:43:05,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:43:05,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:43:05,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:43:05,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:43:05,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:43:05,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:43:05,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:43:05,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:43:05,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:43:05,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:43:05,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:43:05,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:43:05,701 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 [2020-10-12 09:43:05,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:43:05,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:43:05,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:43:05,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:43:05,744 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:43:05,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:43:05,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:43:05,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:43:05,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:43:05,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:43:05,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:43:05,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:43:05,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:43:05,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:43:05,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:43:05,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:43:05,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:43:05,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:43:05,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:43:05,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:43:05,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:43:05,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:43:05,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:43:05,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:43:05,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:43:05,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:43:05,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:43:05,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:43:05,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:43:05,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:43:06,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:43:06,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:43:06,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:43:06,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:43:06,091 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:43:06,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-12 09:43:06,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8e7c3336/b8f0c58accc645d78831803ddfd5e0df/FLAG100dc118e [2020-10-12 09:43:06,649 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:43:06,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-12 09:43:06,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8e7c3336/b8f0c58accc645d78831803ddfd5e0df/FLAG100dc118e [2020-10-12 09:43:06,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8e7c3336/b8f0c58accc645d78831803ddfd5e0df [2020-10-12 09:43:07,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:43:07,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:43:07,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:07,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:43:07,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:43:07,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:06" (1/1) ... [2020-10-12 09:43:07,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07, skipping insertion in model container [2020-10-12 09:43:07,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:06" (1/1) ... [2020-10-12 09:43:07,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:43:07,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:43:07,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:07,257 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:43:07,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:07,303 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:43:07,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07 WrapperNode [2020-10-12 09:43:07,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:07,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:43:07,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:43:07,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:43:07,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (1/1) ... [2020-10-12 09:43:07,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:43:07,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:43:07,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:43:07,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:43:07,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (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 [2020-10-12 09:43:07,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:43:07,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:43:07,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 09:43:07,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:43:07,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:43:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:43:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:43:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 09:43:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:43:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:43:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:43:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:43:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:43:07,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:43:07,935 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-12 09:43:07,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:07 BoogieIcfgContainer [2020-10-12 09:43:07,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:43:07,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:43:07,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:43:07,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:43:07,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:43:06" (1/3) ... [2020-10-12 09:43:07,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624d3cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:07, skipping insertion in model container [2020-10-12 09:43:07,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:07" (2/3) ... [2020-10-12 09:43:07,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624d3cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:07, skipping insertion in model container [2020-10-12 09:43:07,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:07" (3/3) ... [2020-10-12 09:43:07,950 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2020-10-12 09:43:07,962 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:43:07,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:43:07,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:43:08,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:43:08,019 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:43:08,019 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:43:08,019 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:43:08,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:43:08,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:43:08,020 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:43:08,021 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:43:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-12 09:43:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:43:08,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:08,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:08,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:08,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1057208235, now seen corresponding path program 1 times [2020-10-12 09:43:08,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:08,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276409475] [2020-10-12 09:43:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:08,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:09,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:43:09,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:43:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-12 09:43:09,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:43:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:43:09,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:09,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:09,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:43:09,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:09,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:09,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276409475] [2020-10-12 09:43:09,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:09,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 09:43:09,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921960127] [2020-10-12 09:43:09,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:09,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:09,549 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-10-12 09:43:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:09,873 INFO L93 Difference]: Finished difference Result 88 states and 130 transitions. [2020-10-12 09:43:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:09,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 09:43:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:09,885 INFO L225 Difference]: With dead ends: 88 [2020-10-12 09:43:09,885 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:43:09,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:43:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:43:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:43:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 09:43:09,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2020-10-12 09:43:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:09,938 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 09:43:09,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 09:43:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:43:09,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:09,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:09,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:43:09,941 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash -817797343, now seen corresponding path program 1 times [2020-10-12 09:43:09,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:09,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680683847] [2020-10-12 09:43:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:09,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:14,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:14,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:43:14,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 09:43:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:43:14,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:43:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:43:14,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:15,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:15,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:15,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:15,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:15,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:15,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:15,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:15,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:15,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:15,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680683847] [2020-10-12 09:43:15,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:15,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:43:15,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298087568] [2020-10-12 09:43:15,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:15,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:15,027 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 6 states. [2020-10-12 09:43:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:15,257 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2020-10-12 09:43:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:43:15,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-12 09:43:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:15,260 INFO L225 Difference]: With dead ends: 73 [2020-10-12 09:43:15,260 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 09:43:15,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:43:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 09:43:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 09:43:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:43:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-12 09:43:15,270 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-10-12 09:43:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:15,271 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-12 09:43:15,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-12 09:43:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:43:15,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:15,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:15,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:43:15,273 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1760122197, now seen corresponding path program 1 times [2020-10-12 09:43:15,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:15,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049854354] [2020-10-12 09:43:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:43:20,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:43:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:43:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:43:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:43:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:20,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:20,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:20,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:20,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:20,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:20,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:20,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:20,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:20,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:20,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:20,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:43:20,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049854354] [2020-10-12 09:43:20,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:20,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:43:20,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644941958] [2020-10-12 09:43:20,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:20,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:20,382 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-12 09:43:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:20,650 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-12 09:43:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:20,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-12 09:43:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:20,653 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:43:20,655 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:43:20,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:43:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 09:43:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:43:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-12 09:43:20,675 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2020-10-12 09:43:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:20,675 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-12 09:43:20,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-12 09:43:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:43:20,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:20,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:20,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:43:20,679 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1896329191, now seen corresponding path program 2 times [2020-10-12 09:43:20,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:20,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879218333] [2020-10-12 09:43:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:24,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:25,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:25,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:43:25,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:43:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5233 [2020-10-12 09:43:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:43:25,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:43:25,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:43:25,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 09:43:26,867 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-12 09:43:27,076 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 09:43:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:28,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:28,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:28,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:28,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:28,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:28,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879218333] [2020-10-12 09:43:28,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:28,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:43:28,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222271494] [2020-10-12 09:43:28,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:43:28,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:28,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:43:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:43:28,845 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 36 states. [2020-10-12 09:43:29,064 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-12 09:43:29,626 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2020-10-12 09:43:30,001 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-12 09:43:30,422 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-12 09:43:30,783 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-10-12 09:43:31,228 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2020-10-12 09:43:31,673 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2020-10-12 09:43:32,053 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 42 [2020-10-12 09:43:32,342 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-10-12 09:43:32,602 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 41 [2020-10-12 09:43:32,996 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-12 09:43:33,398 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-10-12 09:43:33,677 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-12 09:43:34,452 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 09:43:34,974 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2020-10-12 09:43:35,414 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-12 09:43:36,218 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-12 09:43:36,559 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-10-12 09:43:36,884 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-12 09:43:37,714 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-12 09:43:38,093 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-10-12 09:43:38,427 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-12 09:43:38,928 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 09:43:39,470 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-12 09:43:39,789 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-12 09:43:40,173 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-12 09:43:40,650 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-12 09:43:41,003 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-12 09:43:41,308 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-12 09:43:41,658 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 53 [2020-10-12 09:43:41,985 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-12 09:43:42,319 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2020-10-12 09:43:42,598 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-12 09:43:42,884 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-12 09:43:43,185 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-12 09:43:43,679 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 55 [2020-10-12 09:43:44,032 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-12 09:43:44,364 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2020-10-12 09:43:44,619 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-12 09:43:45,038 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2020-10-12 09:43:45,354 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 50 [2020-10-12 09:43:45,684 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2020-10-12 09:43:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:45,823 INFO L93 Difference]: Finished difference Result 148 states and 169 transitions. [2020-10-12 09:43:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 09:43:45,823 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 52 [2020-10-12 09:43:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:45,826 INFO L225 Difference]: With dead ends: 148 [2020-10-12 09:43:45,826 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:43:45,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1297, Invalid=7445, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 09:43:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:43:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-12 09:43:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 09:43:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-12 09:43:45,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 52 [2020-10-12 09:43:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:45,847 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-12 09:43:45,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:43:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-12 09:43:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:43:45,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:45,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:45,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:43:45,850 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash 504642053, now seen corresponding path program 3 times [2020-10-12 09:43:45,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:45,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519538016] [2020-10-12 09:43:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:50,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:43:50,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:43:50,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:43:50,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 09:43:50,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:43:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:50,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:50,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:50,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:50,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:50,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:50,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:50,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 09:43:50,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519538016] [2020-10-12 09:43:50,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:50,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:50,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905503456] [2020-10-12 09:43:50,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:50,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:50,967 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 10 states. [2020-10-12 09:43:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:51,492 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2020-10-12 09:43:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:43:51,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-12 09:43:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:51,494 INFO L225 Difference]: With dead ends: 134 [2020-10-12 09:43:51,494 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 09:43:51,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:43:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 09:43:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-10-12 09:43:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 09:43:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-12 09:43:51,525 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 54 [2020-10-12 09:43:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:51,526 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-12 09:43:51,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-12 09:43:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:43:51,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:51,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:51,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:43:51,532 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1895186113, now seen corresponding path program 4 times [2020-10-12 09:43:51,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:51,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265474147] [2020-10-12 09:43:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:56,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:56,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:43:56,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:43:56,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:43:56,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:43:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:43:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:56,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:56,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:56,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:56,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:56,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:56,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 09:43:56,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265474147] [2020-10-12 09:43:56,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:56,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:56,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103670251] [2020-10-12 09:43:56,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:56,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:56,672 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 10 states. [2020-10-12 09:43:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:57,106 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-10-12 09:43:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:43:57,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-12 09:43:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:57,109 INFO L225 Difference]: With dead ends: 143 [2020-10-12 09:43:57,109 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:43:57,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:43:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:43:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-12 09:43:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:43:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-12 09:43:57,127 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 58 [2020-10-12 09:43:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:57,127 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-12 09:43:57,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-12 09:43:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:43:57,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:57,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:57,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:43:57,132 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1675076345, now seen corresponding path program 5 times [2020-10-12 09:43:57,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:57,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283967195] [2020-10-12 09:43:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:57,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:02,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:02,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 09:44:02,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:44:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-12 09:44:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:44:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 09:44:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:04,758 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 09:44:04,954 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-12 09:44:05,284 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 09:44:05,458 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-12 09:44:05,638 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 09:44:05,832 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 09:44:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:07,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:07,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:07,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:44:07,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283967195] [2020-10-12 09:44:07,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:07,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:44:07,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910712752] [2020-10-12 09:44:07,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:44:07,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:44:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:44:07,871 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 48 states. [2020-10-12 09:44:08,410 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-12 09:44:08,852 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-12 09:44:09,170 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 09:44:09,395 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 09:44:10,067 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-12 09:44:10,839 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 09:44:11,141 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-12 09:44:11,383 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 09:44:11,639 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-12 09:44:12,043 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2020-10-12 09:44:12,244 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-12 09:44:12,655 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-12 09:44:13,057 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-12 09:44:13,250 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 09:44:13,593 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-12 09:44:13,999 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-12 09:44:14,375 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-12 09:44:14,599 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 09:44:14,884 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-12 09:44:15,494 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 09:44:15,858 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 09:44:16,283 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-12 09:44:16,675 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-12 09:44:17,182 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 65 [2020-10-12 09:44:17,615 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 69 [2020-10-12 09:44:17,987 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 09:44:18,783 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-12 09:44:19,370 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-12 09:44:19,948 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 58 [2020-10-12 09:44:20,494 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 61 [2020-10-12 09:44:21,237 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-12 09:44:21,740 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-12 09:44:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:23,725 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2020-10-12 09:44:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 09:44:23,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-10-12 09:44:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:23,730 INFO L225 Difference]: With dead ends: 164 [2020-10-12 09:44:23,730 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 09:44:23,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1057, Invalid=9043, Unknown=0, NotChecked=0, Total=10100 [2020-10-12 09:44:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 09:44:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-10-12 09:44:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 09:44:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2020-10-12 09:44:23,753 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 66 [2020-10-12 09:44:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:23,754 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2020-10-12 09:44:23,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:44:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2020-10-12 09:44:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:44:23,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:23,755 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:23,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:44:23,756 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -739200681, now seen corresponding path program 6 times [2020-10-12 09:44:23,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:23,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865125381] [2020-10-12 09:44:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:44:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:28,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-12 09:44:28,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865125381] [2020-10-12 09:44:28,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:28,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:28,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180399848] [2020-10-12 09:44:28,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:28,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:28,899 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 12 states. [2020-10-12 09:44:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:29,763 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2020-10-12 09:44:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:29,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-12 09:44:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:29,767 INFO L225 Difference]: With dead ends: 197 [2020-10-12 09:44:29,768 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 09:44:29,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:44:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 09:44:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2020-10-12 09:44:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 09:44:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-10-12 09:44:29,788 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 68 [2020-10-12 09:44:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:29,789 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-10-12 09:44:29,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-10-12 09:44:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:44:29,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:29,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:29,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:44:29,790 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash 148971543, now seen corresponding path program 7 times [2020-10-12 09:44:29,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:29,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653983604] [2020-10-12 09:44:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:29,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:44:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:44:34,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:44:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:34,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:34,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:34,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:34,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:34,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:34,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:34,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:34,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-12 09:44:34,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653983604] [2020-10-12 09:44:34,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:34,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:34,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634514498] [2020-10-12 09:44:34,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:34,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:34,934 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 12 states. [2020-10-12 09:44:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:35,472 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2020-10-12 09:44:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:44:35,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-12 09:44:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:35,474 INFO L225 Difference]: With dead ends: 193 [2020-10-12 09:44:35,474 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:44:35,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:44:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:44:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-12 09:44:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 09:44:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-12 09:44:35,490 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 68 [2020-10-12 09:44:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:35,490 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-12 09:44:35,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-12 09:44:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:44:35,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:35,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:35,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:44:35,492 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1601457803, now seen corresponding path program 8 times [2020-10-12 09:44:35,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:35,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014114487] [2020-10-12 09:44:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:37,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:44:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:44:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5843 [2020-10-12 09:44:41,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 09:44:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:44:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 09:44:41,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:45,734 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-12 09:44:47,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:47,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:44:47,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014114487] [2020-10-12 09:44:47,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:47,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 09:44:47,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83243381] [2020-10-12 09:44:47,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 09:44:47,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 09:44:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 09:44:47,996 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 59 states. [2020-10-12 09:44:48,318 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-12 09:44:49,944 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-12 09:44:51,678 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-12 09:44:51,922 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-12 09:44:52,903 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 09:44:53,279 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-12 09:44:54,083 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-12 09:44:54,610 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-12 09:44:55,398 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2020-10-12 09:44:56,045 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 39 [2020-10-12 09:44:56,726 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-12 09:44:57,477 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-12 09:44:57,996 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-12 09:44:58,915 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-12 09:44:59,808 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-12 09:45:00,275 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-10-12 09:45:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:02,479 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2020-10-12 09:45:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 09:45:02,480 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 80 [2020-10-12 09:45:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:02,483 INFO L225 Difference]: With dead ends: 190 [2020-10-12 09:45:02,483 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 09:45:02,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=648, Invalid=8282, Unknown=0, NotChecked=0, Total=8930 [2020-10-12 09:45:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 09:45:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2020-10-12 09:45:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 09:45:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2020-10-12 09:45:02,510 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 80 [2020-10-12 09:45:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:02,510 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2020-10-12 09:45:02,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 09:45:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2020-10-12 09:45:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:45:02,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:02,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:02,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:45:02,512 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1878970583, now seen corresponding path program 9 times [2020-10-12 09:45:02,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:02,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175083230] [2020-10-12 09:45:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:02,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:03,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 09:45:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:45:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:07,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:07,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:07,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:07,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:07,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:07,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:07,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-12 09:45:07,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175083230] [2020-10-12 09:45:07,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:07,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:45:07,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328864220] [2020-10-12 09:45:07,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:45:07,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:45:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:07,817 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand 14 states. [2020-10-12 09:45:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:09,210 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2020-10-12 09:45:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:45:09,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-12 09:45:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:09,214 INFO L225 Difference]: With dead ends: 311 [2020-10-12 09:45:09,214 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 09:45:09,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:45:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 09:45:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2020-10-12 09:45:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:45:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-10-12 09:45:09,240 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 82 [2020-10-12 09:45:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:09,240 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-10-12 09:45:09,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:45:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-10-12 09:45:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:45:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:09,241 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:09,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:45:09,241 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:09,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1121582935, now seen corresponding path program 10 times [2020-10-12 09:45:09,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:09,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912097944] [2020-10-12 09:45:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:14,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:45:14,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:45:14,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:45:14,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:14,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:14,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:45:14,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:45:14,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:14,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:14,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:14,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:45:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-12 09:45:14,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912097944] [2020-10-12 09:45:14,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:14,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:45:14,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686683564] [2020-10-12 09:45:14,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:45:14,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:45:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:14,518 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 14 states. [2020-10-12 09:45:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:15,746 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2020-10-12 09:45:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:45:15,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-12 09:45:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:15,749 INFO L225 Difference]: With dead ends: 150 [2020-10-12 09:45:15,749 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 09:45:15,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:45:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 09:45:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 09:45:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 09:45:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-12 09:45:15,762 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 82 [2020-10-12 09:45:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:15,762 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-12 09:45:15,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:45:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-12 09:45:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:45:15,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:15,763 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:15,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:45:15,763 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 939578013, now seen corresponding path program 11 times [2020-10-12 09:45:15,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:15,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385450846] [2020-10-12 09:45:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:15,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:20,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:21,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:21,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:45:21,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:45:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5607 [2020-10-12 09:45:21,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 09:45:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:45:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 09:45:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:32,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:32,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:32,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:32,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:32,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:32,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:32,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:32,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:45:32,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385450846] [2020-10-12 09:45:32,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:32,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 09:45:32,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318955216] [2020-10-12 09:45:32,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 09:45:32,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 09:45:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=5184, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 09:45:32,378 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 75 states. [2020-10-12 09:45:33,383 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 09:45:36,308 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-12 09:45:36,670 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-12 09:45:37,059 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 09:45:37,385 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 09:45:37,924 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-12 09:45:38,328 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-12 09:45:38,696 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-12 09:45:41,001 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 105 [2020-10-12 09:45:41,513 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-12 09:45:42,080 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 09:45:42,632 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 09:45:45,317 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-12 09:45:49,871 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2020-10-12 09:45:50,481 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-12 09:45:51,399 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-12 09:45:51,897 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-12 09:45:52,748 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-10-12 09:45:53,737 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-12 09:45:54,274 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 09:45:54,935 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-12 09:45:55,859 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-12 09:45:56,276 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-12 09:45:58,619 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-12 09:46:03,423 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-12 09:46:04,358 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 41 [2020-10-12 09:46:05,488 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 56 [2020-10-12 09:46:06,173 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-12 09:46:07,003 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-10-12 09:46:07,621 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-12 09:46:08,612 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 65 [2020-10-12 09:46:09,770 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 76 [2020-10-12 09:46:10,543 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 33 [2020-10-12 09:46:11,607 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-12 09:46:12,597 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-10-12 09:46:14,258 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-12 09:46:15,014 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-10-12 09:46:16,069 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 43 [2020-10-12 09:46:17,038 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-12 09:46:18,414 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-10-12 09:46:19,020 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 31 [2020-10-12 09:46:19,949 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-10-12 09:46:20,907 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-12 09:46:22,088 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-12 09:46:23,222 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-12 09:46:24,186 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-10-12 09:46:25,720 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 09:46:27,305 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-10-12 09:46:28,605 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-12 09:46:29,668 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 09:46:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:36,019 INFO L93 Difference]: Finished difference Result 211 states and 229 transitions. [2020-10-12 09:46:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-12 09:46:36,026 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 94 [2020-10-12 09:46:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:36,028 INFO L225 Difference]: With dead ends: 211 [2020-10-12 09:46:36,028 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 09:46:36,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4312 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=1543, Invalid=18763, Unknown=0, NotChecked=0, Total=20306 [2020-10-12 09:46:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 09:46:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 160. [2020-10-12 09:46:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 09:46:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-12 09:46:36,058 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 94 [2020-10-12 09:46:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:36,058 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-12 09:46:36,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 09:46:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-12 09:46:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:46:36,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:36,060 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:36,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:46:36,061 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1527556091, now seen corresponding path program 12 times [2020-10-12 09:46:36,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:36,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114376137] [2020-10-12 09:46:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:36,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:36,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:41,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:41,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:46:41,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:46:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:41,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:41,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-12 09:46:41,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114376137] [2020-10-12 09:46:41,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:41,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:46:41,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284007020] [2020-10-12 09:46:41,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:46:41,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:46:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:46:41,586 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 16 states. [2020-10-12 09:46:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:44,551 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-12 09:46:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:46:44,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-12 09:46:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:44,555 INFO L225 Difference]: With dead ends: 246 [2020-10-12 09:46:44,555 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:46:44,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:46:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:46:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2020-10-12 09:46:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 09:46:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2020-10-12 09:46:44,586 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 96 [2020-10-12 09:46:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:44,586 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2020-10-12 09:46:44,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:46:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2020-10-12 09:46:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:46:44,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:44,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:44,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:46:44,588 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2004678331, now seen corresponding path program 13 times [2020-10-12 09:46:44,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:44,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472797853] [2020-10-12 09:46:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:44,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:44,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:49,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 09:46:49,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:50,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:50,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:50,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:50,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:50,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:50,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:50,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:50,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-12 09:46:50,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472797853] [2020-10-12 09:46:50,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:50,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:46:50,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758595218] [2020-10-12 09:46:50,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:46:50,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:46:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:46:50,075 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand 16 states. [2020-10-12 09:46:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:51,859 INFO L93 Difference]: Finished difference Result 265 states and 280 transitions. [2020-10-12 09:46:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:46:51,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-12 09:46:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:51,864 INFO L225 Difference]: With dead ends: 265 [2020-10-12 09:46:51,864 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 09:46:51,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:46:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 09:46:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-12 09:46:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 09:46:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-12 09:46:51,884 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 96 [2020-10-12 09:46:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:51,884 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-12 09:46:51,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:46:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-12 09:46:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 09:46:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:51,885 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:51,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:46:51,886 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:51,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1235767087, now seen corresponding path program 14 times [2020-10-12 09:46:51,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:51,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713788675] [2020-10-12 09:46:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking...