/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:19:53,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:19:54,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:19:54,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:19:54,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:19:54,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:19:54,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:19:54,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:19:54,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:19:54,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:19:54,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:19:54,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:19:54,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:19:54,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:19:54,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:19:54,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:19:54,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:19:54,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:19:54,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:19:54,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:19:54,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:19:54,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:19:54,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:19:54,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:19:54,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:19:54,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:19:54,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:19:54,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:19:54,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:19:54,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:19:54,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:19:54,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:19:54,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:19:54,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:19:54,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:19:54,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:19:54,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:19:54,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:19:54,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:19:54,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:19:54,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:19:54,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 03:19:54,079 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:19:54,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:19:54,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:19:54,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:19:54,080 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:19:54,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:19:54,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:19:54,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:19:54,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:19:54,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:19:54,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:19:54,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:19:54,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:19:54,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:19:54,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:19:54,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:19:54,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:19:54,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:19:54,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:19:54,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:19:54,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:19:54,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:19:54,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:19:54,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:19:54,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:19:54,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:19:54,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:19:54,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:19:54,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:19:54,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:19:54,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:19:54,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:19:54,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:19:54,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:19:54,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:19:54,451 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:19:54,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65586d40b/d02d21c1095842469cc3d98756743366/FLAG52cd0210a [2020-10-15 03:19:55,014 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:19:55,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:19:55,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65586d40b/d02d21c1095842469cc3d98756743366/FLAG52cd0210a [2020-10-15 03:19:55,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65586d40b/d02d21c1095842469cc3d98756743366 [2020-10-15 03:19:55,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:19:55,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:19:55,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:19:55,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:19:55,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:19:55,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b1442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55, skipping insertion in model container [2020-10-15 03:19:55,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:19:55,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:19:55,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:19:55,682 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:19:55,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:19:55,860 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:19:55,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55 WrapperNode [2020-10-15 03:19:55,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:19:55,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:19:55,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:19:55,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:19:55,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... [2020-10-15 03:19:55,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:19:55,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:19:55,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:19:55,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:19:55,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:19:56,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:19:56,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:19:56,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:19:56,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:19:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:19:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:19:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:19:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-15 03:19:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:19:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:19:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:19:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:19:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:19:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:19:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:19:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:19:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:19:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:19:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:19:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:19:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:19:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:19:56,564 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:19:56,565 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:19:56,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:56 BoogieIcfgContainer [2020-10-15 03:19:56,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:19:56,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:19:56,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:19:56,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:19:56,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:19:55" (1/3) ... [2020-10-15 03:19:56,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e87b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:56, skipping insertion in model container [2020-10-15 03:19:56,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:55" (2/3) ... [2020-10-15 03:19:56,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e87b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:56, skipping insertion in model container [2020-10-15 03:19:56,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:56" (3/3) ... [2020-10-15 03:19:56,580 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:19:56,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:19:56,612 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:19:56,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:19:56,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:19:56,658 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:19:56,658 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:19:56,658 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:19:56,659 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:19:56,659 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:19:56,659 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:19:56,659 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:19:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-15 03:19:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 03:19:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:56,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:19:56,691 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1223956034, now seen corresponding path program 1 times [2020-10-15 03:19:56,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:56,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796397108] [2020-10-15 03:19:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:57,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:57,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:57,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:01,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:01,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 03:20:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:20:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4737 [2020-10-15 03:20:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:01,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:20:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 03:20:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 03:20:02,065 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-15 03:20:02,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:02,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:02,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:02,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:02,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:02,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-15 03:20:02,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:02,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:02,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:02,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:02,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:02,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796397108] [2020-10-15 03:20:02,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:02,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:02,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469736545] [2020-10-15 03:20:02,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:20:02,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:20:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:02,167 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 6 states. [2020-10-15 03:20:02,367 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:02,938 INFO L93 Difference]: Finished difference Result 201 states and 313 transitions. [2020-10-15 03:20:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:20:02,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-15 03:20:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:02,953 INFO L225 Difference]: With dead ends: 201 [2020-10-15 03:20:02,953 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 03:20:02,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:20:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 03:20:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-15 03:20:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-15 03:20:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2020-10-15 03:20:03,016 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 52 [2020-10-15 03:20:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:03,017 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2020-10-15 03:20:03,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:20:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2020-10-15 03:20:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 03:20:03,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:03,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:03,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:20:03,020 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2097048153, now seen corresponding path program 1 times [2020-10-15 03:20:03,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:03,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759265453] [2020-10-15 03:20:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:03,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:03,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:04,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:04,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 03:20:04,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:20:04,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-15 03:20:04,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:04,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 03:20:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:04,354 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-15 03:20:04,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:20:04,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:04,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:04,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:04,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:04,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:04,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:04,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759265453] [2020-10-15 03:20:04,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:04,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:04,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950167342] [2020-10-15 03:20:04,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:04,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:04,396 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand 7 states. [2020-10-15 03:20:04,642 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-15 03:20:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:05,248 INFO L93 Difference]: Finished difference Result 939 states and 1470 transitions. [2020-10-15 03:20:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:05,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-15 03:20:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:05,255 INFO L225 Difference]: With dead ends: 939 [2020-10-15 03:20:05,256 INFO L226 Difference]: Without dead ends: 838 [2020-10-15 03:20:05,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-10-15 03:20:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 230. [2020-10-15 03:20:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-15 03:20:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 345 transitions. [2020-10-15 03:20:05,295 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 345 transitions. Word has length 52 [2020-10-15 03:20:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:05,296 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 345 transitions. [2020-10-15 03:20:05,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 345 transitions. [2020-10-15 03:20:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:20:05,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:05,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:05,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:20:05,299 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash 245075410, now seen corresponding path program 1 times [2020-10-15 03:20:05,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:05,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857147067] [2020-10-15 03:20:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:07,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:07,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:20:07,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:20:07,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2666 [2020-10-15 03:20:07,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:07,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:07,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:07,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:07,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:20:07,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:20:08,319 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-15 03:20:08,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:08,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:08,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:08,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:08,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:20:08,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:08,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:08,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:08,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:20:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:08,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857147067] [2020-10-15 03:20:08,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:08,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:08,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838201085] [2020-10-15 03:20:08,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:08,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:08,372 INFO L87 Difference]: Start difference. First operand 230 states and 345 transitions. Second operand 7 states. [2020-10-15 03:20:08,642 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:09,444 INFO L93 Difference]: Finished difference Result 1386 states and 2156 transitions. [2020-10-15 03:20:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:09,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-15 03:20:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:09,460 INFO L225 Difference]: With dead ends: 1386 [2020-10-15 03:20:09,461 INFO L226 Difference]: Without dead ends: 1186 [2020-10-15 03:20:09,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2020-10-15 03:20:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 519. [2020-10-15 03:20:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-15 03:20:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 798 transitions. [2020-10-15 03:20:09,557 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 798 transitions. Word has length 54 [2020-10-15 03:20:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:09,560 INFO L479 AbstractCegarLoop]: Abstraction has 519 states and 798 transitions. [2020-10-15 03:20:09,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 798 transitions. [2020-10-15 03:20:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:20:09,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:09,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:09,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:20:09,573 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash 268820632, now seen corresponding path program 1 times [2020-10-15 03:20:09,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:09,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346438462] [2020-10-15 03:20:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:09,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:09,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:11,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:11,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:20:11,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:20:11,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-15 03:20:11,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:11,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:11,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:20:11,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-15 03:20:12,090 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-15 03:20:12,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:12,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:12,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:12,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:20:12,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:12,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:12,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346438462] [2020-10-15 03:20:12,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:12,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:12,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760779500] [2020-10-15 03:20:12,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:12,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:12,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:12,133 INFO L87 Difference]: Start difference. First operand 519 states and 798 transitions. Second operand 7 states. [2020-10-15 03:20:12,381 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:12,932 INFO L93 Difference]: Finished difference Result 1729 states and 2683 transitions. [2020-10-15 03:20:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:12,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-15 03:20:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:12,941 INFO L225 Difference]: With dead ends: 1729 [2020-10-15 03:20:12,941 INFO L226 Difference]: Without dead ends: 1438 [2020-10-15 03:20:12,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2020-10-15 03:20:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 816. [2020-10-15 03:20:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-15 03:20:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1265 transitions. [2020-10-15 03:20:13,031 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1265 transitions. Word has length 54 [2020-10-15 03:20:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:13,034 INFO L479 AbstractCegarLoop]: Abstraction has 816 states and 1265 transitions. [2020-10-15 03:20:13,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1265 transitions. [2020-10-15 03:20:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:20:13,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:13,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:13,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:20:13,038 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1816805886, now seen corresponding path program 1 times [2020-10-15 03:20:13,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:13,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645294004] [2020-10-15 03:20:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:14,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:20:14,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:20:14,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-15 03:20:14,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:14,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:20:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 03:20:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:14,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:14,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:14,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:14,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:14,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:14,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:14,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:14,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:14,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645294004] [2020-10-15 03:20:14,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:14,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:20:14,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046799245] [2020-10-15 03:20:14,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:20:14,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:20:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:20:14,234 INFO L87 Difference]: Start difference. First operand 816 states and 1265 transitions. Second operand 4 states. [2020-10-15 03:20:14,366 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-15 03:20:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:14,729 INFO L93 Difference]: Finished difference Result 1958 states and 3050 transitions. [2020-10-15 03:20:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:20:14,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-15 03:20:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:14,737 INFO L225 Difference]: With dead ends: 1958 [2020-10-15 03:20:14,737 INFO L226 Difference]: Without dead ends: 1172 [2020-10-15 03:20:14,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2020-10-15 03:20:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1162. [2020-10-15 03:20:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-15 03:20:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1787 transitions. [2020-10-15 03:20:14,872 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1787 transitions. Word has length 54 [2020-10-15 03:20:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:14,873 INFO L479 AbstractCegarLoop]: Abstraction has 1162 states and 1787 transitions. [2020-10-15 03:20:14,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:20:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1787 transitions. [2020-10-15 03:20:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:20:14,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:14,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:14,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:20:14,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1796756543, now seen corresponding path program 1 times [2020-10-15 03:20:14,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:14,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433615668] [2020-10-15 03:20:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:15,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:20:15,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:20:15,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-15 03:20:15,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:15,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:20:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:15,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:15,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:15,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:15,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:15,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:15,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:15,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:15,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:15,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:15,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:15,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:15,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:15,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433615668] [2020-10-15 03:20:15,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:15,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:15,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453999812] [2020-10-15 03:20:15,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:15,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:15,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:15,885 INFO L87 Difference]: Start difference. First operand 1162 states and 1787 transitions. Second operand 7 states. [2020-10-15 03:20:16,047 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:20:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:16,622 INFO L93 Difference]: Finished difference Result 3014 states and 4655 transitions. [2020-10-15 03:20:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:16,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-15 03:20:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:16,633 INFO L225 Difference]: With dead ends: 3014 [2020-10-15 03:20:16,633 INFO L226 Difference]: Without dead ends: 1882 [2020-10-15 03:20:16,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2020-10-15 03:20:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1162. [2020-10-15 03:20:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-15 03:20:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1775 transitions. [2020-10-15 03:20:16,763 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1775 transitions. Word has length 54 [2020-10-15 03:20:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:16,763 INFO L479 AbstractCegarLoop]: Abstraction has 1162 states and 1775 transitions. [2020-10-15 03:20:16,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1775 transitions. [2020-10-15 03:20:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:20:16,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:16,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:16,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:20:16,765 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash -127450484, now seen corresponding path program 1 times [2020-10-15 03:20:16,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:16,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004621969] [2020-10-15 03:20:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:18,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:20:18,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:20:18,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1922 [2020-10-15 03:20:18,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:18,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:20:18,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:18,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:18,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:18,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:18,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:18,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:18,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:18,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:18,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:18,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:18,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:18,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004621969] [2020-10-15 03:20:18,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:18,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:18,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563553532] [2020-10-15 03:20:18,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:18,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:18,880 INFO L87 Difference]: Start difference. First operand 1162 states and 1775 transitions. Second operand 7 states. [2020-10-15 03:20:19,028 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:19,753 INFO L93 Difference]: Finished difference Result 2810 states and 4309 transitions. [2020-10-15 03:20:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:19,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-15 03:20:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:19,765 INFO L225 Difference]: With dead ends: 2810 [2020-10-15 03:20:19,765 INFO L226 Difference]: Without dead ends: 2391 [2020-10-15 03:20:19,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2020-10-15 03:20:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1447. [2020-10-15 03:20:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1447 states. [2020-10-15 03:20:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2215 transitions. [2020-10-15 03:20:19,955 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2215 transitions. Word has length 54 [2020-10-15 03:20:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:19,955 INFO L479 AbstractCegarLoop]: Abstraction has 1447 states and 2215 transitions. [2020-10-15 03:20:19,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2215 transitions. [2020-10-15 03:20:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:20:19,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:19,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:19,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:20:19,958 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash -457330898, now seen corresponding path program 1 times [2020-10-15 03:20:19,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:19,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818926946] [2020-10-15 03:20:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:20,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:21,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:21,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:20:21,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:20:21,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-15 03:20:21,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:21,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:20:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:20:21,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 03:20:21,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:21,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:21,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:21,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:21,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:20:21,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:21,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:21,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:21,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:21,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818926946] [2020-10-15 03:20:21,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:21,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:21,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546861346] [2020-10-15 03:20:21,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:20:21,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:20:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:21,823 INFO L87 Difference]: Start difference. First operand 1447 states and 2215 transitions. Second operand 5 states. [2020-10-15 03:20:21,963 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:22,604 INFO L93 Difference]: Finished difference Result 3371 states and 5198 transitions. [2020-10-15 03:20:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:20:22,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-10-15 03:20:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:22,616 INFO L225 Difference]: With dead ends: 3371 [2020-10-15 03:20:22,616 INFO L226 Difference]: Without dead ends: 2387 [2020-10-15 03:20:22,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-15 03:20:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2363. [2020-10-15 03:20:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2363 states. [2020-10-15 03:20:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3591 transitions. [2020-10-15 03:20:22,836 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3591 transitions. Word has length 55 [2020-10-15 03:20:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:22,836 INFO L479 AbstractCegarLoop]: Abstraction has 2363 states and 3591 transitions. [2020-10-15 03:20:22,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:20:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3591 transitions. [2020-10-15 03:20:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:20:22,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:22,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:22,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:20:22,838 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash -680333326, now seen corresponding path program 1 times [2020-10-15 03:20:22,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:22,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973823092] [2020-10-15 03:20:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:22,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:22,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:22,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:23,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:27,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:27,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:20:27,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:20:27,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:20:27,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:27,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:27,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 03:20:27,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:28,092 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-15 03:20:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:28,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:20:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:28,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:28,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973823092] [2020-10-15 03:20:28,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:28,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:20:28,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086235998] [2020-10-15 03:20:28,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:28,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:28,146 INFO L87 Difference]: Start difference. First operand 2363 states and 3591 transitions. Second operand 7 states. [2020-10-15 03:20:28,296 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-15 03:20:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:29,042 INFO L93 Difference]: Finished difference Result 6776 states and 10397 transitions. [2020-10-15 03:20:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:20:29,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-15 03:20:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:29,070 INFO L225 Difference]: With dead ends: 6776 [2020-10-15 03:20:29,070 INFO L226 Difference]: Without dead ends: 4931 [2020-10-15 03:20:29,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:20:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2020-10-15 03:20:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 2368. [2020-10-15 03:20:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2368 states. [2020-10-15 03:20:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3597 transitions. [2020-10-15 03:20:29,317 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3597 transitions. Word has length 55 [2020-10-15 03:20:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:29,317 INFO L479 AbstractCegarLoop]: Abstraction has 2368 states and 3597 transitions. [2020-10-15 03:20:29,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3597 transitions. [2020-10-15 03:20:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:20:29,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:29,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:29,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:20:29,319 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash 133212632, now seen corresponding path program 1 times [2020-10-15 03:20:29,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:29,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632552145] [2020-10-15 03:20:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:29,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:29,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:29,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:20:29,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:20:29,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-15 03:20:29,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:29,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 03:20:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:20:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:29,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:29,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:29,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:29,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:20:29,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:29,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:29,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632552145] [2020-10-15 03:20:29,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:29,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:20:29,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691628310] [2020-10-15 03:20:29,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:20:29,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:20:29,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:20:29,856 INFO L87 Difference]: Start difference. First operand 2368 states and 3597 transitions. Second operand 4 states. [2020-10-15 03:20:29,980 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-15 03:20:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:30,716 INFO L93 Difference]: Finished difference Result 6634 states and 10069 transitions. [2020-10-15 03:20:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:20:30,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-15 03:20:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:30,739 INFO L225 Difference]: With dead ends: 6634 [2020-10-15 03:20:30,739 INFO L226 Difference]: Without dead ends: 4301 [2020-10-15 03:20:30,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2020-10-15 03:20:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 4299. [2020-10-15 03:20:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4299 states. [2020-10-15 03:20:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 6457 transitions. [2020-10-15 03:20:31,219 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 6457 transitions. Word has length 55 [2020-10-15 03:20:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:31,220 INFO L479 AbstractCegarLoop]: Abstraction has 4299 states and 6457 transitions. [2020-10-15 03:20:31,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:20:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 6457 transitions. [2020-10-15 03:20:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:20:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:31,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:31,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:20:31,223 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 470009310, now seen corresponding path program 1 times [2020-10-15 03:20:31,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890424024] [2020-10-15 03:20:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:31,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:32,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:32,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:20:32,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:20:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-10-15 03:20:32,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:32,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:20:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 03:20:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:32,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:32,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:32,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:32,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:32,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:32,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:20:32,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:32,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:32,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890424024] [2020-10-15 03:20:32,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:32,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:32,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531378909] [2020-10-15 03:20:32,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:20:32,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:32,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:20:32,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:32,315 INFO L87 Difference]: Start difference. First operand 4299 states and 6457 transitions. Second operand 6 states. [2020-10-15 03:20:32,459 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:33,514 INFO L93 Difference]: Finished difference Result 12777 states and 19199 transitions. [2020-10-15 03:20:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:20:33,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-15 03:20:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:33,552 INFO L225 Difference]: With dead ends: 12777 [2020-10-15 03:20:33,552 INFO L226 Difference]: Without dead ends: 8513 [2020-10-15 03:20:33,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:20:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2020-10-15 03:20:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 8511. [2020-10-15 03:20:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8511 states. [2020-10-15 03:20:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 12727 transitions. [2020-10-15 03:20:34,340 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 12727 transitions. Word has length 56 [2020-10-15 03:20:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:34,341 INFO L479 AbstractCegarLoop]: Abstraction has 8511 states and 12727 transitions. [2020-10-15 03:20:34,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:20:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 12727 transitions. [2020-10-15 03:20:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:20:34,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:34,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:34,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:20:34,343 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1438235175, now seen corresponding path program 1 times [2020-10-15 03:20:34,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:34,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716811755] [2020-10-15 03:20:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:34,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:34,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:20:34,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:20:34,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-15 03:20:34,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:34,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:34,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 03:20:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 03:20:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:34,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:34,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:34,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:20:34,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:34,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:34,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716811755] [2020-10-15 03:20:34,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:34,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:20:34,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030401682] [2020-10-15 03:20:34,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:20:34,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:20:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:20:34,689 INFO L87 Difference]: Start difference. First operand 8511 states and 12727 transitions. Second operand 4 states. [2020-10-15 03:20:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:36,067 INFO L93 Difference]: Finished difference Result 23863 states and 35509 transitions. [2020-10-15 03:20:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:20:36,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-15 03:20:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:36,101 INFO L225 Difference]: With dead ends: 23863 [2020-10-15 03:20:36,101 INFO L226 Difference]: Without dead ends: 15387 [2020-10-15 03:20:36,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15387 states. [2020-10-15 03:20:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15387 to 15385. [2020-10-15 03:20:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15385 states. [2020-10-15 03:20:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15385 states to 15385 states and 22617 transitions. [2020-10-15 03:20:37,224 INFO L78 Accepts]: Start accepts. Automaton has 15385 states and 22617 transitions. Word has length 56 [2020-10-15 03:20:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:37,224 INFO L479 AbstractCegarLoop]: Abstraction has 15385 states and 22617 transitions. [2020-10-15 03:20:37,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:20:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15385 states and 22617 transitions. [2020-10-15 03:20:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:20:37,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:37,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:37,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:20:37,226 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:37,226 INFO L82 PathProgramCache]: Analyzing trace with hash 283538507, now seen corresponding path program 1 times [2020-10-15 03:20:37,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:37,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302437683] [2020-10-15 03:20:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:37,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:20:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:20:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-15 03:20:37,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:37,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-15 03:20:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 03:20:37,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:37,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:37,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:37,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:37,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:37,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:20:37,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:37,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:37,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302437683] [2020-10-15 03:20:37,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:37,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:20:37,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355714703] [2020-10-15 03:20:37,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:20:37,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:20:37,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:20:37,488 INFO L87 Difference]: Start difference. First operand 15385 states and 22617 transitions. Second operand 4 states. [2020-10-15 03:20:37,608 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-15 03:20:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:39,697 INFO L93 Difference]: Finished difference Result 42885 states and 62579 transitions. [2020-10-15 03:20:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:20:39,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-15 03:20:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:39,764 INFO L225 Difference]: With dead ends: 42885 [2020-10-15 03:20:39,765 INFO L226 Difference]: Without dead ends: 27535 [2020-10-15 03:20:39,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27535 states. [2020-10-15 03:20:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27535 to 27533. [2020-10-15 03:20:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27533 states. [2020-10-15 03:20:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27533 states to 27533 states and 39597 transitions. [2020-10-15 03:20:42,374 INFO L78 Accepts]: Start accepts. Automaton has 27533 states and 39597 transitions. Word has length 57 [2020-10-15 03:20:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:42,374 INFO L479 AbstractCegarLoop]: Abstraction has 27533 states and 39597 transitions. [2020-10-15 03:20:42,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:20:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27533 states and 39597 transitions. [2020-10-15 03:20:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:20:42,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:42,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:42,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:20:42,375 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash -818472475, now seen corresponding path program 1 times [2020-10-15 03:20:42,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:42,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493178226] [2020-10-15 03:20:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:42,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:42,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:42,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:20:42,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:20:42,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-15 03:20:42,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:42,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:20:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:42,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 03:20:42,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:42,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:42,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:42,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:20:42,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:42,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:42,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:42,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493178226] [2020-10-15 03:20:42,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:42,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:42,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537974889] [2020-10-15 03:20:42,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:20:42,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:42,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:20:42,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:42,706 INFO L87 Difference]: Start difference. First operand 27533 states and 39597 transitions. Second operand 6 states. [2020-10-15 03:20:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:46,763 INFO L93 Difference]: Finished difference Result 82129 states and 117919 transitions. [2020-10-15 03:20:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:20:46,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-15 03:20:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:46,909 INFO L225 Difference]: With dead ends: 82129 [2020-10-15 03:20:46,909 INFO L226 Difference]: Without dead ends: 54631 [2020-10-15 03:20:46,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:20:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54631 states. [2020-10-15 03:20:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54631 to 54629. [2020-10-15 03:20:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54629 states. [2020-10-15 03:20:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54629 states to 54629 states and 77957 transitions. [2020-10-15 03:20:51,951 INFO L78 Accepts]: Start accepts. Automaton has 54629 states and 77957 transitions. Word has length 58 [2020-10-15 03:20:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:51,952 INFO L479 AbstractCegarLoop]: Abstraction has 54629 states and 77957 transitions. [2020-10-15 03:20:51,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:20:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 54629 states and 77957 transitions. [2020-10-15 03:20:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:20:51,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:51,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:51,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:20:51,953 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1347762976, now seen corresponding path program 1 times [2020-10-15 03:20:51,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:51,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143246347] [2020-10-15 03:20:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:51,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:52,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:52,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:20:52,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:52,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-15 03:20:52,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:52,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:20:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-15 03:20:52,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:20:52,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:52,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:52,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:52,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:52,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143246347] [2020-10-15 03:20:52,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:52,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:52,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950371891] [2020-10-15 03:20:52,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:20:52,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:20:52,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:52,180 INFO L87 Difference]: Start difference. First operand 54629 states and 77957 transitions. Second operand 5 states. [2020-10-15 03:20:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:58,091 INFO L93 Difference]: Finished difference Result 82640 states and 118032 transitions. [2020-10-15 03:20:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:20:58,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-15 03:20:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:58,219 INFO L225 Difference]: With dead ends: 82640 [2020-10-15 03:20:58,219 INFO L226 Difference]: Without dead ends: 82638 [2020-10-15 03:20:58,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82638 states. [2020-10-15 03:21:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82638 to 55781. [2020-10-15 03:21:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55781 states. [2020-10-15 03:21:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55781 states to 55781 states and 78629 transitions. [2020-10-15 03:21:03,665 INFO L78 Accepts]: Start accepts. Automaton has 55781 states and 78629 transitions. Word has length 58 [2020-10-15 03:21:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:03,665 INFO L479 AbstractCegarLoop]: Abstraction has 55781 states and 78629 transitions. [2020-10-15 03:21:03,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:21:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 55781 states and 78629 transitions. [2020-10-15 03:21:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:21:03,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:03,672 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1] [2020-10-15 03:21:03,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:21:03,672 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash 430688876, now seen corresponding path program 1 times [2020-10-15 03:21:03,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:03,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500798933] [2020-10-15 03:21:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:03,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:03,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:05,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:08,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:08,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:21:08,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:21:08,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:21:08,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:08,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:21:08,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 03:21:08,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:08,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:08,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:08,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:08,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:08,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:08,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500798933] [2020-10-15 03:21:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:21:08,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:21:08,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228089520] [2020-10-15 03:21:08,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:08,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:08,849 INFO L87 Difference]: Start difference. First operand 55781 states and 78629 transitions. Second operand 6 states. [2020-10-15 03:21:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:14,737 INFO L93 Difference]: Finished difference Result 80884 states and 114906 transitions. [2020-10-15 03:21:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:14,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-15 03:21:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:14,832 INFO L225 Difference]: With dead ends: 80884 [2020-10-15 03:21:14,832 INFO L226 Difference]: Without dead ends: 70882 [2020-10-15 03:21:14,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70882 states. [2020-10-15 03:21:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70882 to 66773. [2020-10-15 03:21:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66773 states. [2020-10-15 03:21:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66773 states to 66773 states and 94869 transitions. [2020-10-15 03:21:22,078 INFO L78 Accepts]: Start accepts. Automaton has 66773 states and 94869 transitions. Word has length 82 [2020-10-15 03:21:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:22,078 INFO L479 AbstractCegarLoop]: Abstraction has 66773 states and 94869 transitions. [2020-10-15 03:21:22,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 66773 states and 94869 transitions. [2020-10-15 03:21:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:21:22,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:22,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2020-10-15 03:21:22,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:21:22,087 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:22,087 INFO L82 PathProgramCache]: Analyzing trace with hash 568651465, now seen corresponding path program 1 times [2020-10-15 03:21:22,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:22,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081801844] [2020-10-15 03:21:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:22,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:22,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:22,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:24,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:21:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 03:21:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:27,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:27,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:27,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:27,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:27,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081801844] [2020-10-15 03:21:27,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:21:27,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:21:27,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801085366] [2020-10-15 03:21:27,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:21:27,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:21:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:27,494 INFO L87 Difference]: Start difference. First operand 66773 states and 94869 transitions. Second operand 9 states. [2020-10-15 03:21:27,657 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:22:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:01,549 INFO L93 Difference]: Finished difference Result 388372 states and 548845 transitions. [2020-10-15 03:22:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 03:22:01,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-15 03:22:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:02,077 INFO L225 Difference]: With dead ends: 388372 [2020-10-15 03:22:02,077 INFO L226 Difference]: Without dead ends: 321634 [2020-10-15 03:22:02,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2020-10-15 03:22:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321634 states. [2020-10-15 03:22:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321634 to 121041. [2020-10-15 03:22:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121041 states. [2020-10-15 03:22:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121041 states to 121041 states and 170217 transitions. [2020-10-15 03:22:19,529 INFO L78 Accepts]: Start accepts. Automaton has 121041 states and 170217 transitions. Word has length 83 [2020-10-15 03:22:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:19,530 INFO L479 AbstractCegarLoop]: Abstraction has 121041 states and 170217 transitions. [2020-10-15 03:22:19,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:22:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 121041 states and 170217 transitions. [2020-10-15 03:22:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:22:19,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:19,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2020-10-15 03:22:19,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:22:19,539 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash -970192323, now seen corresponding path program 1 times [2020-10-15 03:22:19,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:19,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844953405] [2020-10-15 03:22:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:19,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:20,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:21,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:24,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:24,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:22:24,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:22:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:22:24,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:24,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:22:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:22:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 03:22:24,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:24,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:24,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:24,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:24,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:22:24,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:24,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:22:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:22:24,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:24,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844953405] [2020-10-15 03:22:24,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:22:24,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:22:24,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796499459] [2020-10-15 03:22:24,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:22:24,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:22:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:22:24,850 INFO L87 Difference]: Start difference. First operand 121041 states and 170217 transitions. Second operand 9 states.