/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:51:11,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:51:11,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:51:11,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:51:11,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:51:11,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:51:11,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:51:11,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:51:11,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:51:11,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:51:11,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:51:11,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:51:11,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:51:11,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:51:11,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:51:11,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:51:11,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:51:11,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:51:11,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:51:11,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:51:11,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:51:11,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:51:11,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:51:11,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:51:11,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:51:11,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:51:11,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:51:11,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:51:11,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:51:11,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:51:11,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:51:11,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:51:11,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:51:11,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:51:11,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:51:11,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:51:11,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:51:11,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:51:11,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:51:11,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:51:11,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:51:11,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:51:11,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:51:11,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:51:11,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:51:11,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:51:11,742 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:51:11,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:51:11,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:51:11,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:51:11,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:51:11,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:51:11,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:51:11,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:51:11,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:51:11,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:51:11,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:51:11,746 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:51:11,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:51:11,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:51:11,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:51:11,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:51:11,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:51:11,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:51:11,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:51:11,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:51:11,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:51:11,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:51:11,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:51:11,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:51:11,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:51:11,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:51:12,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:51:12,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:51:12,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:51:12,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:51:12,247 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:51:12,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 06:51:12,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/595a9aff8/5acc6c6a4d5f47218ad1d1ee3046aaac/FLAG57a62c72a [2020-09-25 06:51:12,934 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:51:12,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 06:51:12,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/595a9aff8/5acc6c6a4d5f47218ad1d1ee3046aaac/FLAG57a62c72a [2020-09-25 06:51:13,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/595a9aff8/5acc6c6a4d5f47218ad1d1ee3046aaac [2020-09-25 06:51:13,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:51:13,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:51:13,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:51:13,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:51:13,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:51:13,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ea5cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13, skipping insertion in model container [2020-09-25 06:51:13,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:51:13,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:51:13,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:51:13,593 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:51:13,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:51:13,635 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:51:13,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13 WrapperNode [2020-09-25 06:51:13,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:51:13,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:51:13,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:51:13,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:51:13,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... [2020-09-25 06:51:13,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:51:13,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:51:13,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:51:13,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:51:13,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:51:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:51:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:51:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:51:13,840 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 06:51:13,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:51:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:51:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:51:13,841 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:51:13,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:51:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 06:51:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:51:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:51:13,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:51:14,195 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:51:14,196 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 06:51:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:51:14 BoogieIcfgContainer [2020-09-25 06:51:14,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:51:14,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:51:14,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:51:14,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:51:14,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:51:13" (1/3) ... [2020-09-25 06:51:14,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a168a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:51:14, skipping insertion in model container [2020-09-25 06:51:14,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:51:13" (2/3) ... [2020-09-25 06:51:14,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a168a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:51:14, skipping insertion in model container [2020-09-25 06:51:14,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:51:14" (3/3) ... [2020-09-25 06:51:14,211 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 06:51:14,221 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:51:14,231 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:51:14,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:51:14,283 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:51:14,283 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:51:14,283 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:51:14,284 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:51:14,284 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:51:14,284 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:51:14,284 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:51:14,284 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:51:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 06:51:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 06:51:14,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:14,318 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] [2020-09-25 06:51:14,318 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 06:51:14,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:14,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460435625] [2020-09-25 06:51:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:14,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:14,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:14,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 06:51:14,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:14,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-25 06:51:14,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:14,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:14,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 06:51:14,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 06:51:14,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:14,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:14,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:14,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:51:14,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:14,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:14,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:14,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:14,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:14,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:14,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:51:14,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:51:14,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:14,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 06:51:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:51:14,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460435625] [2020-09-25 06:51:14,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:51:14,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:51:14,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664591688] [2020-09-25 06:51:14,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:51:14,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:51:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:51:14,997 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 06:51:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:15,250 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 06:51:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:51:15,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 06:51:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:15,270 INFO L225 Difference]: With dead ends: 94 [2020-09-25 06:51:15,270 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 06:51:15,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:51:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 06:51:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 06:51:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 06:51:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 06:51:15,355 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 06:51:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:15,356 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 06:51:15,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:51:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 06:51:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 06:51:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:15,362 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] [2020-09-25 06:51:15,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:51:15,363 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-25 06:51:15,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:15,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927811968] [2020-09-25 06:51:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:15,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:15,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:15,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 06:51:15,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-09-25 06:51:15,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:15,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:51:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 06:51:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 06:51:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:15,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:15,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:15,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:15,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:15,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:51:15,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:15,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:15,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:15,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:15,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:15,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:51:15,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 06:51:15,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:15,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:15,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:51:15,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927811968] [2020-09-25 06:51:15,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:51:15,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:51:15,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292781094] [2020-09-25 06:51:15,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:51:15,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:51:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:51:15,865 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-25 06:51:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:16,105 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-25 06:51:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:51:16,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 06:51:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:16,109 INFO L225 Difference]: With dead ends: 83 [2020-09-25 06:51:16,109 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 06:51:16,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:51:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 06:51:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 06:51:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 06:51:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 06:51:16,126 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 06:51:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:16,127 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 06:51:16,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:51:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 06:51:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 06:51:16,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:16,129 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] [2020-09-25 06:51:16,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:51:16,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 06:51:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:16,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023712823] [2020-09-25 06:51:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:16,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:17,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:17,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 06:51:17,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:51:17,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-09-25 06:51:17,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:17,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:17,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:51:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 06:51:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:51:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:17,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:17,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:17,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:17,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:17,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:51:17,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:17,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:17,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:17,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:17,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:17,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:51:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:17,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:17,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:51:17,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 06:51:17,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:17,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:17,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:17,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:17,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:17,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:51:17,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023712823] [2020-09-25 06:51:17,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:17,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:51:17,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213975359] [2020-09-25 06:51:17,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:51:17,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:51:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:51:17,920 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-25 06:51:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:18,156 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-25 06:51:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 06:51:18,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-25 06:51:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:18,159 INFO L225 Difference]: With dead ends: 92 [2020-09-25 06:51:18,159 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 06:51:18,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:51:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 06:51:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-25 06:51:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 06:51:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-09-25 06:51:18,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2020-09-25 06:51:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:18,171 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-09-25 06:51:18,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:51:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-09-25 06:51:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 06:51:18,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:18,173 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-25 06:51:18,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:51:18,173 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:18,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1465690975, now seen corresponding path program 2 times [2020-09-25 06:51:18,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:18,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169771336] [2020-09-25 06:51:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:18,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:18,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:18,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:20,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:20,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 06:51:20,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:51:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2472 [2020-09-25 06:51:20,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:20,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:20,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:51:20,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 06:51:20,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:51:20,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:20,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:20,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:20,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:20,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:20,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:51:20,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:20,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:20,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:20,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:20,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:20,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:20,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:20,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:20,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:51:20,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 06:51:20,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:20,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:20,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:51:20,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169771336] [2020-09-25 06:51:20,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:20,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 06:51:20,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116111594] [2020-09-25 06:51:20,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 06:51:20,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 06:51:20,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:51:20,803 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 9 states. [2020-09-25 06:51:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:21,062 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-09-25 06:51:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:51:21,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 06:51:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:21,064 INFO L225 Difference]: With dead ends: 101 [2020-09-25 06:51:21,064 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 06:51:21,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-25 06:51:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 06:51:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-09-25 06:51:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 06:51:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-09-25 06:51:21,074 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 43 [2020-09-25 06:51:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:21,075 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-09-25 06:51:21,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 06:51:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-09-25 06:51:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 06:51:21,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:21,077 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-25 06:51:21,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:51:21,078 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1794777616, now seen corresponding path program 3 times [2020-09-25 06:51:21,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:21,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358729639] [2020-09-25 06:51:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:21,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:24,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:24,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 06:51:24,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:51:24,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3641 [2020-09-25 06:51:24,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:24,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:51:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:51:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:51:24,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:24,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:24,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:24,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:24,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:51:24,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:24,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:24,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:24,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:24,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:24,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:24,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:51:24,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:24,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 06:51:24,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:24,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:51:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 06:51:24,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 06:51:24,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:51:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 06:51:24,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358729639] [2020-09-25 06:51:24,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:51:24,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 06:51:24,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303490388] [2020-09-25 06:51:24,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:51:24,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:51:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:51:24,846 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 7 states. [2020-09-25 06:51:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:25,098 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-09-25 06:51:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 06:51:25,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-09-25 06:51:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:25,100 INFO L225 Difference]: With dead ends: 119 [2020-09-25 06:51:25,100 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 06:51:25,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:51:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 06:51:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-09-25 06:51:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 06:51:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-09-25 06:51:25,110 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 50 [2020-09-25 06:51:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:25,110 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-09-25 06:51:25,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:51:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-09-25 06:51:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 06:51:25,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:25,112 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:51:25,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:51:25,112 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 938976628, now seen corresponding path program 1 times [2020-09-25 06:51:25,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:25,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266969300] [2020-09-25 06:51:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:25,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:27,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:30,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 06:51:30,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:51:30,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 06:51:30,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:30,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:51:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 06:51:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:51:30,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:30,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:30,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:51:30,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:30,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:30,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:30,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 06:51:30,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:30,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 06:51:30,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:30,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:30,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:30,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:30,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:30,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:51:30,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266969300] [2020-09-25 06:51:30,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:30,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:51:30,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216699460] [2020-09-25 06:51:30,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:51:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:51:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:51:30,332 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 11 states. [2020-09-25 06:51:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:30,605 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-09-25 06:51:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 06:51:30,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-09-25 06:51:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:30,608 INFO L225 Difference]: With dead ends: 108 [2020-09-25 06:51:30,608 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 06:51:30,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:51:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 06:51:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-09-25 06:51:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 06:51:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-09-25 06:51:30,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 56 [2020-09-25 06:51:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:30,618 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-09-25 06:51:30,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:51:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-09-25 06:51:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 06:51:30,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:30,620 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:51:30,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:51:30,620 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash -607155779, now seen corresponding path program 2 times [2020-09-25 06:51:30,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:30,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574775106] [2020-09-25 06:51:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:32,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:32,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:35,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:35,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:35,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 06:51:35,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:51:35,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 06:51:35,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:35,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:51:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:51:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 06:51:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:35,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:35,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:51:35,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:35,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:35,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:35,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:35,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:36,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:36,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 06:51:36,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-25 06:51:36,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:36,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:51:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:51:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-25 06:51:36,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574775106] [2020-09-25 06:51:36,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:36,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 06:51:36,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270787737] [2020-09-25 06:51:36,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 06:51:36,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 06:51:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:51:36,107 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 11 states. [2020-09-25 06:51:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:36,524 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-09-25 06:51:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:51:36,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-09-25 06:51:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:36,527 INFO L225 Difference]: With dead ends: 188 [2020-09-25 06:51:36,527 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 06:51:36,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:51:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 06:51:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 90. [2020-09-25 06:51:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 06:51:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-09-25 06:51:36,546 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 63 [2020-09-25 06:51:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:36,547 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-09-25 06:51:36,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 06:51:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-09-25 06:51:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 06:51:36,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:36,550 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:51:36,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:51:36,551 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash 958230332, now seen corresponding path program 1 times [2020-09-25 06:51:36,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:36,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640536453] [2020-09-25 06:51:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:36,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:36,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:36,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:37,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:41,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:41,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 06:51:41,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:51:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 06:51:41,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:41,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:51:41,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 06:51:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 06:51:41,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:41,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:41,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:41,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:41,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:41,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:41,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:51:41,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:41,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:41,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:41,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:41,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:41,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 06:51:41,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:41,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 06:51:41,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:41,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:41,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:41,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-09-25 06:51:41,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640536453] [2020-09-25 06:51:41,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:51:41,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:51:41,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832753897] [2020-09-25 06:51:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:51:41,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:51:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:51:41,740 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 5 states. [2020-09-25 06:51:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:41,893 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2020-09-25 06:51:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:51:41,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-09-25 06:51:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:41,895 INFO L225 Difference]: With dead ends: 141 [2020-09-25 06:51:41,895 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 06:51:41,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:51:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 06:51:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 06:51:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 06:51:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-09-25 06:51:41,902 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 64 [2020-09-25 06:51:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:41,903 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-09-25 06:51:41,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:51:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-09-25 06:51:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 06:51:41,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:41,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2020-09-25 06:51:41,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 06:51:41,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 647305401, now seen corresponding path program 3 times [2020-09-25 06:51:41,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:41,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870038853] [2020-09-25 06:51:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:41,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:42,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:45,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:46,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 06:51:46,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:51:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 06:51:46,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:46,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 06:51:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:51:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 06:51:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:47,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:47,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:47,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:47,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:47,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:47,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:51:47,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:47,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:47,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:47,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:47,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:51:47,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:51:47,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-09-25 06:51:47,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:47,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:51:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:47,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 06:51:47,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 06:51:47,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870038853] [2020-09-25 06:51:47,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:47,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 06:51:47,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869320488] [2020-09-25 06:51:47,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 06:51:47,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 06:51:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-25 06:51:47,736 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 15 states. [2020-09-25 06:51:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:48,179 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-09-25 06:51:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 06:51:48,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-09-25 06:51:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:48,181 INFO L225 Difference]: With dead ends: 131 [2020-09-25 06:51:48,181 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 06:51:48,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-09-25 06:51:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 06:51:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-09-25 06:51:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 06:51:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-09-25 06:51:48,191 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 69 [2020-09-25 06:51:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:48,192 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-09-25 06:51:48,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 06:51:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-09-25 06:51:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 06:51:48,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:48,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2020-09-25 06:51:48,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 06:51:48,196 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1360689845, now seen corresponding path program 4 times [2020-09-25 06:51:48,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:48,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750393225] [2020-09-25 06:51:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:49,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:49,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:49,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:49,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:53,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:53,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 06:51:53,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:51:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 06:51:53,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:53,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 06:51:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:51:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 06:51:53,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:53,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:51:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:53,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:53,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:51:53,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:51:53,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:51:53,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:53,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:53,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:51:53,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:53,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:51:53,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:51:53,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 06:51:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:54,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:51:54,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 06:51:54,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:51:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 06:51:54,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:51:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 06:51:55,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750393225] [2020-09-25 06:51:55,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:51:55,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 06:51:55,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381988152] [2020-09-25 06:51:55,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 06:51:55,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:51:55,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 06:51:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-09-25 06:51:55,285 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 20 states. [2020-09-25 06:51:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:51:56,230 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2020-09-25 06:51:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 06:51:56,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-25 06:51:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:51:56,232 INFO L225 Difference]: With dead ends: 139 [2020-09-25 06:51:56,232 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 06:51:56,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 06:51:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 06:51:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-09-25 06:51:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 06:51:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-09-25 06:51:56,241 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 75 [2020-09-25 06:51:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:51:56,242 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-09-25 06:51:56,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 06:51:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-09-25 06:51:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 06:51:56,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:51:56,243 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-09-25 06:51:56,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 06:51:56,244 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:51:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:51:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash 318074801, now seen corresponding path program 5 times [2020-09-25 06:51:56,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:51:56,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476768968] [2020-09-25 06:51:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:51:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:51:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:56,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:57,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:51:58,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking...