/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-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:50:11,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:50:11,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:50:11,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:50:11,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:50:11,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:50:11,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:50:11,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:50:11,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:50:11,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:50:11,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:50:11,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:50:11,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:50:11,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:50:11,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:50:11,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:50:11,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:50:11,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:50:11,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:50:11,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:50:11,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:50:11,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:50:11,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:50:11,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:50:11,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:50:11,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:50:11,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:50:11,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:50:11,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:50:11,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:50:11,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:50:11,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:50:11,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:50:11,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:50:11,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:50:11,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:50:11,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:50:11,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:50:11,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:50:11,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:50:11,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:50:11,168 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 03:50:11,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:50:11,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:50:11,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:50:11,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:50:11,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:50:11,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:50:11,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:50:11,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:50:11,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:50:11,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:50:11,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:50:11,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:50:11,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:50:11,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:50:11,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:50:11,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:50:11,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:50:11,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:50:11,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:50:11,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:50:11,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:50:11,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:50:11,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:50:11,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:50:11,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:50:11,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:50:11,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:50:11,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:50:11,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:50:11,200 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 03:50:11,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:50:11,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:50:11,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:50:11,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:50:11,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:50:11,549 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:50:11,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f905afad/076fd384313b402bad740192af68491b/FLAGb4c825474 [2020-10-15 03:50:12,034 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:50:12,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:50:12,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f905afad/076fd384313b402bad740192af68491b/FLAGb4c825474 [2020-10-15 03:50:12,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f905afad/076fd384313b402bad740192af68491b [2020-10-15 03:50:12,441 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:50:12,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:50:12,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:50:12,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:50:12,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:50:12,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:50:12" (1/1) ... [2020-10-15 03:50:12,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5abf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:12, skipping insertion in model container [2020-10-15 03:50:12,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:50:12" (1/1) ... [2020-10-15 03:50:12,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:50:12,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:50:12,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:50:12,828 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:50:13,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:50:13,116 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:50:13,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13 WrapperNode [2020-10-15 03:50:13,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:50:13,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:50:13,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:50:13,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:50:13,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... [2020-10-15 03:50:13,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:50:13,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:50:13,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:50:13,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:50:13,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:50:13,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:50:13,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:50:13,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:50:13,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:50:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:50:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:50:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:50:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-15 03:50:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:50:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:50:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:50:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:50:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:50:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:50:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:50:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:50:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:50:14,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:50:14,045 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:50:14,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:50:14 BoogieIcfgContainer [2020-10-15 03:50:14,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:50:14,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:50:14,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:50:14,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:50:14,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:50:12" (1/3) ... [2020-10-15 03:50:14,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524a7775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:50:14, skipping insertion in model container [2020-10-15 03:50:14,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:50:13" (2/3) ... [2020-10-15 03:50:14,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524a7775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:50:14, skipping insertion in model container [2020-10-15 03:50:14,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:50:14" (3/3) ... [2020-10-15 03:50:14,059 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:50:14,068 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:50:14,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:50:14,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:50:14,114 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:50:14,115 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:50:14,115 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:50:14,115 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:50:14,115 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:50:14,115 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:50:14,116 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:50:14,116 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:50:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-15 03:50:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 03:50:14,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:14,149 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] [2020-10-15 03:50:14,149 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-15 03:50:14,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:14,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006758959] [2020-10-15 03:50:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:14,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:16,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:16,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 03:50:16,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:50:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2280 [2020-10-15 03:50:16,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:16,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:50:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:50:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 03:50:16,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:50:16,981 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:16,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:17,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:17,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:50:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:17,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:17,020 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 03:50:17,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006758959] [2020-10-15 03:50:17,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:17,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:50:17,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721071409] [2020-10-15 03:50:17,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:50:17,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:50:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:17,047 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 7 states. [2020-10-15 03:50:17,283 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-15 03:50:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:17,905 INFO L93 Difference]: Finished difference Result 547 states and 860 transitions. [2020-10-15 03:50:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 03:50:17,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-15 03:50:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:17,924 INFO L225 Difference]: With dead ends: 547 [2020-10-15 03:50:17,924 INFO L226 Difference]: Without dead ends: 441 [2020-10-15 03:50:17,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:50:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-15 03:50:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 193. [2020-10-15 03:50:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-15 03:50:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 288 transitions. [2020-10-15 03:50:17,999 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 288 transitions. Word has length 53 [2020-10-15 03:50:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:18,000 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 288 transitions. [2020-10-15 03:50:18,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:50:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 288 transitions. [2020-10-15 03:50:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:50:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:18,004 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 03:50:18,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:50:18,004 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1932418099, now seen corresponding path program 1 times [2020-10-15 03:50:18,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:18,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784421219] [2020-10-15 03:50:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:18,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:18,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:50:18,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:50:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-15 03:50:18,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:18,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:18,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:18,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 03:50:18,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:50:18,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:19,125 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:19,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:19,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:19,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:19,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:19,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:50:19,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:19,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:19,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:19,152 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 03:50:19,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784421219] [2020-10-15 03:50:19,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:19,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:50:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479730760] [2020-10-15 03:50:19,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:50:19,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:19,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:50:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:50:19,156 INFO L87 Difference]: Start difference. First operand 193 states and 288 transitions. Second operand 4 states. [2020-10-15 03:50:19,339 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:50:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:19,823 INFO L93 Difference]: Finished difference Result 485 states and 750 transitions. [2020-10-15 03:50:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:50:19,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-15 03:50:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:19,827 INFO L225 Difference]: With dead ends: 485 [2020-10-15 03:50:19,827 INFO L226 Difference]: Without dead ends: 323 [2020-10-15 03:50:19,829 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 03:50:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-15 03:50:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2020-10-15 03:50:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-15 03:50:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 490 transitions. [2020-10-15 03:50:19,857 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 490 transitions. Word has length 54 [2020-10-15 03:50:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:19,858 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 490 transitions. [2020-10-15 03:50:19,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:50:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 490 transitions. [2020-10-15 03:50:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 03:50:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:19,861 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 03:50:19,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:50:19,862 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1607374331, now seen corresponding path program 1 times [2020-10-15 03:50:19,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:19,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275422623] [2020-10-15 03:50:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:19,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:20,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:20,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:20,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 03:50:20,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:50:20,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-15 03:50:20,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:20,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-15 03:50:20,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 03:50:20,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:20,457 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:20,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:20,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:20,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:20,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:50:20,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:20,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:20,484 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 03:50:20,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275422623] [2020-10-15 03:50:20,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:20,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:50:20,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534466713] [2020-10-15 03:50:20,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:50:20,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:50:20,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:50:20,487 INFO L87 Difference]: Start difference. First operand 321 states and 490 transitions. Second operand 4 states. [2020-10-15 03:50:20,629 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:50:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:21,201 INFO L93 Difference]: Finished difference Result 837 states and 1304 transitions. [2020-10-15 03:50:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:50:21,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-15 03:50:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:21,206 INFO L225 Difference]: With dead ends: 837 [2020-10-15 03:50:21,207 INFO L226 Difference]: Without dead ends: 547 [2020-10-15 03:50:21,212 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 03:50:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-15 03:50:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2020-10-15 03:50:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-15 03:50:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 840 transitions. [2020-10-15 03:50:21,283 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 840 transitions. Word has length 55 [2020-10-15 03:50:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:21,287 INFO L479 AbstractCegarLoop]: Abstraction has 545 states and 840 transitions. [2020-10-15 03:50:21,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:50:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 840 transitions. [2020-10-15 03:50:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 03:50:21,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:21,299 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, 1, 1] [2020-10-15 03:50:21,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:50:21,300 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash -199562700, now seen corresponding path program 1 times [2020-10-15 03:50:21,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:21,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440811927] [2020-10-15 03:50:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:21,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:21,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:21,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 03:50:21,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:50:21,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-15 03:50:21,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:21,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-15 03:50:21,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 03:50:21,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:50:21,854 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:21,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:21,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:21,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:21,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:21,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:50:21,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:21,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:21,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:21,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:21,919 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 03:50:21,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440811927] [2020-10-15 03:50:21,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:21,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:50:21,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106053419] [2020-10-15 03:50:21,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:50:21,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:50:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:50:21,921 INFO L87 Difference]: Start difference. First operand 545 states and 840 transitions. Second operand 4 states. [2020-10-15 03:50:22,063 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:50:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:22,520 INFO L93 Difference]: Finished difference Result 1445 states and 2250 transitions. [2020-10-15 03:50:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:50:22,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-15 03:50:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:22,526 INFO L225 Difference]: With dead ends: 1445 [2020-10-15 03:50:22,527 INFO L226 Difference]: Without dead ends: 931 [2020-10-15 03:50:22,528 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 03:50:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-15 03:50:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-10-15 03:50:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-10-15 03:50:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1432 transitions. [2020-10-15 03:50:22,577 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1432 transitions. Word has length 56 [2020-10-15 03:50:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:22,577 INFO L479 AbstractCegarLoop]: Abstraction has 929 states and 1432 transitions. [2020-10-15 03:50:22,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:50:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1432 transitions. [2020-10-15 03:50:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:50:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:22,579 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 03:50:22,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:50:22,579 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1692023771, now seen corresponding path program 1 times [2020-10-15 03:50:22,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:22,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084133559] [2020-10-15 03:50:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:22,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:22,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:23,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:23,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:50:23,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:50:23,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-15 03:50:23,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:23,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:50:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:50:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:50:23,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:23,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:23,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:23,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:23,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:50:23,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:23,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:23,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:23,280 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 03:50:23,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084133559] [2020-10-15 03:50:23,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:23,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:50:23,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616613850] [2020-10-15 03:50:23,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:50:23,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:50:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:23,283 INFO L87 Difference]: Start difference. First operand 929 states and 1432 transitions. Second operand 7 states. [2020-10-15 03:50:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:24,508 INFO L93 Difference]: Finished difference Result 4033 states and 6236 transitions. [2020-10-15 03:50:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:50:24,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-15 03:50:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:24,525 INFO L225 Difference]: With dead ends: 4033 [2020-10-15 03:50:24,525 INFO L226 Difference]: Without dead ends: 3135 [2020-10-15 03:50:24,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2020-10-15 03:50:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3129. [2020-10-15 03:50:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-10-15 03:50:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4816 transitions. [2020-10-15 03:50:24,716 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4816 transitions. Word has length 57 [2020-10-15 03:50:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:24,716 INFO L479 AbstractCegarLoop]: Abstraction has 3129 states and 4816 transitions. [2020-10-15 03:50:24,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:50:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4816 transitions. [2020-10-15 03:50:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:50:24,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:24,719 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 03:50:24,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:50:24,719 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1505218120, now seen corresponding path program 1 times [2020-10-15 03:50:24,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:24,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676491324] [2020-10-15 03:50:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:24,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:25,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:25,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:50:25,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:50:25,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-15 03:50:25,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:25,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:50:25,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 03:50:25,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:25,590 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:25,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:25,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:25,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:25,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:25,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:25,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:50:25,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:25,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:25,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:25,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:25,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:25,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:25,627 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 03:50:25,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676491324] [2020-10-15 03:50:25,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:25,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:50:25,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319342994] [2020-10-15 03:50:25,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:50:25,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:50:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:50:25,630 INFO L87 Difference]: Start difference. First operand 3129 states and 4816 transitions. Second operand 4 states. [2020-10-15 03:50:25,811 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:50:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:26,772 INFO L93 Difference]: Finished difference Result 8653 states and 13278 transitions. [2020-10-15 03:50:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:50:26,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-15 03:50:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:26,802 INFO L225 Difference]: With dead ends: 8653 [2020-10-15 03:50:26,802 INFO L226 Difference]: Without dead ends: 5555 [2020-10-15 03:50:26,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:50:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2020-10-15 03:50:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 5497. [2020-10-15 03:50:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5497 states. [2020-10-15 03:50:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5497 states to 5497 states and 8324 transitions. [2020-10-15 03:50:27,163 INFO L78 Accepts]: Start accepts. Automaton has 5497 states and 8324 transitions. Word has length 58 [2020-10-15 03:50:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:27,163 INFO L479 AbstractCegarLoop]: Abstraction has 5497 states and 8324 transitions. [2020-10-15 03:50:27,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:50:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5497 states and 8324 transitions. [2020-10-15 03:50:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 03:50:27,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:27,165 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 03:50:27,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:50:27,166 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -554316614, now seen corresponding path program 1 times [2020-10-15 03:50:27,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:27,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228463571] [2020-10-15 03:50:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:27,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:27,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:27,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:27,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 03:50:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:50:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-15 03:50:27,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:27,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:27,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 03:50:27,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 03:50:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:27,582 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:27,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:27,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:27,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:27,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:50:27,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:27,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:27,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:27,616 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 03:50:27,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228463571] [2020-10-15 03:50:27,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:27,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:50:27,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754506195] [2020-10-15 03:50:27,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:50:27,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:50:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:50:27,619 INFO L87 Difference]: Start difference. First operand 5497 states and 8324 transitions. Second operand 4 states. [2020-10-15 03:50:27,846 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:50:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:28,968 INFO L93 Difference]: Finished difference Result 10624 states and 16170 transitions. [2020-10-15 03:50:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:50:28,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-15 03:50:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:29,008 INFO L225 Difference]: With dead ends: 10624 [2020-10-15 03:50:29,009 INFO L226 Difference]: Without dead ends: 7525 [2020-10-15 03:50:29,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:50:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2020-10-15 03:50:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 7523. [2020-10-15 03:50:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7523 states. [2020-10-15 03:50:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 11318 transitions. [2020-10-15 03:50:29,533 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 11318 transitions. Word has length 58 [2020-10-15 03:50:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:29,534 INFO L479 AbstractCegarLoop]: Abstraction has 7523 states and 11318 transitions. [2020-10-15 03:50:29,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:50:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 11318 transitions. [2020-10-15 03:50:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 03:50:29,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:29,535 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, 1] [2020-10-15 03:50:29,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:50:29,536 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1145306670, now seen corresponding path program 1 times [2020-10-15 03:50:29,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:29,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968576166] [2020-10-15 03:50:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:29,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:29,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 03:50:29,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:50:29,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-15 03:50:29,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:29,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:29,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:50:29,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:50:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 03:50:29,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:50:30,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:30,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:30,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:30,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:30,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:30,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-15 03:50:30,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:30,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:50:30,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:30,110 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 03:50:30,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968576166] [2020-10-15 03:50:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:50:30,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703268459] [2020-10-15 03:50:30,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:50:30,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:50:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:50:30,117 INFO L87 Difference]: Start difference. First operand 7523 states and 11318 transitions. Second operand 6 states. [2020-10-15 03:50:30,265 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 03:50:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:31,509 INFO L93 Difference]: Finished difference Result 18999 states and 28668 transitions. [2020-10-15 03:50:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:50:31,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-15 03:50:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:31,575 INFO L225 Difference]: With dead ends: 18999 [2020-10-15 03:50:31,575 INFO L226 Difference]: Without dead ends: 11509 [2020-10-15 03:50:31,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 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 03:50:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2020-10-15 03:50:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 11507. [2020-10-15 03:50:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11507 states. [2020-10-15 03:50:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11507 states to 11507 states and 17166 transitions. [2020-10-15 03:50:32,384 INFO L78 Accepts]: Start accepts. Automaton has 11507 states and 17166 transitions. Word has length 59 [2020-10-15 03:50:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:32,385 INFO L479 AbstractCegarLoop]: Abstraction has 11507 states and 17166 transitions. [2020-10-15 03:50:32,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:50:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 11507 states and 17166 transitions. [2020-10-15 03:50:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 03:50:32,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:32,386 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, 1] [2020-10-15 03:50:32,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:50:32,386 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 624665037, now seen corresponding path program 1 times [2020-10-15 03:50:32,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:32,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878117282] [2020-10-15 03:50:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:32,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:32,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 03:50:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-15 03:50:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:32,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:50:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-15 03:50:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:50:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:32,717 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:32,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:32,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:32,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:50:32,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:32,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:32,747 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 03:50:32,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878117282] [2020-10-15 03:50:32,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:50:32,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:50:32,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710563011] [2020-10-15 03:50:32,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:50:32,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:32,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:50:32,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:50:32,751 INFO L87 Difference]: Start difference. First operand 11507 states and 17166 transitions. Second operand 5 states. [2020-10-15 03:50:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:35,035 INFO L93 Difference]: Finished difference Result 22271 states and 33067 transitions. [2020-10-15 03:50:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:50:35,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-15 03:50:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:35,086 INFO L225 Difference]: With dead ends: 22271 [2020-10-15 03:50:35,086 INFO L226 Difference]: Without dead ends: 22269 [2020-10-15 03:50:35,094 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 03:50:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22269 states. [2020-10-15 03:50:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22269 to 12003. [2020-10-15 03:50:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12003 states. [2020-10-15 03:50:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 17630 transitions. [2020-10-15 03:50:36,087 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 17630 transitions. Word has length 59 [2020-10-15 03:50:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:36,088 INFO L479 AbstractCegarLoop]: Abstraction has 12003 states and 17630 transitions. [2020-10-15 03:50:36,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:50:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 17630 transitions. [2020-10-15 03:50:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:50:36,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:36,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:36,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:50:36,101 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1625509601, now seen corresponding path program 1 times [2020-10-15 03:50:36,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:36,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639831511] [2020-10-15 03:50:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:37,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:50:37,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:50:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-15 03:50:37,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:37,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:50:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:50:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 03:50:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 03:50:38,022 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:38,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:38,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:38,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:38,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:38,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:50:38,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:38,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:38,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:50:38,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639831511] [2020-10-15 03:50:38,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:38,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 03:50:38,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243377095] [2020-10-15 03:50:38,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:50:38,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:38,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:50:38,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:50:38,064 INFO L87 Difference]: Start difference. First operand 12003 states and 17630 transitions. Second operand 5 states. [2020-10-15 03:50:38,214 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:50:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:40,409 INFO L93 Difference]: Finished difference Result 30497 states and 44921 transitions. [2020-10-15 03:50:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:50:40,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-15 03:50:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:40,467 INFO L225 Difference]: With dead ends: 30497 [2020-10-15 03:50:40,468 INFO L226 Difference]: Without dead ends: 20943 [2020-10-15 03:50:40,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20943 states. [2020-10-15 03:50:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20943 to 20827. [2020-10-15 03:50:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20827 states. [2020-10-15 03:50:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20827 states to 20827 states and 30294 transitions. [2020-10-15 03:50:41,640 INFO L78 Accepts]: Start accepts. Automaton has 20827 states and 30294 transitions. Word has length 83 [2020-10-15 03:50:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:41,640 INFO L479 AbstractCegarLoop]: Abstraction has 20827 states and 30294 transitions. [2020-10-15 03:50:41,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:50:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 20827 states and 30294 transitions. [2020-10-15 03:50:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:50:41,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:41,649 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-15 03:50:41,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:50:41,649 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1008248663, now seen corresponding path program 1 times [2020-10-15 03:50:41,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:41,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469214019] [2020-10-15 03:50:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:41,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:42,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:44,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:46,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:46,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:50:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:50:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 03:50:46,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:50:46,851 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:46,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:46,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:46,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:46,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:50:46,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:46,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:50:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:50:46,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 03:50:46,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469214019] [2020-10-15 03:50:46,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:46,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:46,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840265477] [2020-10-15 03:50:46,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:50:46,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:50:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:50:46,912 INFO L87 Difference]: Start difference. First operand 20827 states and 30294 transitions. Second operand 7 states. [2020-10-15 03:50:47,224 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:50:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:50:50,499 INFO L93 Difference]: Finished difference Result 60887 states and 89701 transitions. [2020-10-15 03:50:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:50:50,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-15 03:50:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:50:50,623 INFO L225 Difference]: With dead ends: 60887 [2020-10-15 03:50:50,624 INFO L226 Difference]: Without dead ends: 50761 [2020-10-15 03:50:50,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:50:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50761 states. [2020-10-15 03:50:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50761 to 36847. [2020-10-15 03:50:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36847 states. [2020-10-15 03:50:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36847 states to 36847 states and 53670 transitions. [2020-10-15 03:50:53,557 INFO L78 Accepts]: Start accepts. Automaton has 36847 states and 53670 transitions. Word has length 83 [2020-10-15 03:50:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:50:53,558 INFO L479 AbstractCegarLoop]: Abstraction has 36847 states and 53670 transitions. [2020-10-15 03:50:53,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:50:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36847 states and 53670 transitions. [2020-10-15 03:50:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:50:53,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:50:53,564 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-15 03:50:53,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:50:53,565 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:50:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:50:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash -470202186, now seen corresponding path program 1 times [2020-10-15 03:50:53,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:50:53,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994146095] [2020-10-15 03:50:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:50:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:53,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:53,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:54,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:56,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:58,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:58,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:50:58,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:50:58,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 03:50:58,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:58,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:58,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:50:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:50:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 03:50:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:50:58,873 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:50:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:50:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:50:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:50:58,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:50:58,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:50:58,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:50:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 03:50:58,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:50:58,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:50:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:50:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:50:58,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:50:58,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:50:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:50:58,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994146095] [2020-10-15 03:50:58,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:50:58,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:50:58,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804129941] [2020-10-15 03:50:58,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:50:58,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:50:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:50:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:50:58,951 INFO L87 Difference]: Start difference. First operand 36847 states and 53670 transitions. Second operand 8 states. [2020-10-15 03:50:59,161 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:51:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:51:04,737 INFO L93 Difference]: Finished difference Result 118545 states and 172974 transitions. [2020-10-15 03:51:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:51:04,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-15 03:51:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:51:04,865 INFO L225 Difference]: With dead ends: 118545 [2020-10-15 03:51:04,865 INFO L226 Difference]: Without dead ends: 94047 [2020-10-15 03:51:04,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:51:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94047 states. [2020-10-15 03:51:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94047 to 49539. [2020-10-15 03:51:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49539 states. [2020-10-15 03:51:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49539 states to 49539 states and 72402 transitions. [2020-10-15 03:51:09,353 INFO L78 Accepts]: Start accepts. Automaton has 49539 states and 72402 transitions. Word has length 83 [2020-10-15 03:51:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:51:09,354 INFO L479 AbstractCegarLoop]: Abstraction has 49539 states and 72402 transitions. [2020-10-15 03:51:09,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:51:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49539 states and 72402 transitions. [2020-10-15 03:51:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:51:09,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:51:09,363 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-15 03:51:09,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:51:09,363 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:51:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:51:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash -957038017, now seen corresponding path program 1 times [2020-10-15 03:51:09,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:51:09,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352396059] [2020-10-15 03:51:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:51:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:09,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:11,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:14,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:14,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:51:14,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:51:14,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:51:14,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:14,587 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:51:14,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:51:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:14,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:14,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:51:14,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:51:14,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:51:14,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:14,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:14,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:51:14,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:51:14,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:51:14,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:51:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:51:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352396059] [2020-10-15 03:51:14,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:51:14,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:51:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372643376] [2020-10-15 03:51:14,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:51:14,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:51:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:51:14,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:51:14,650 INFO L87 Difference]: Start difference. First operand 49539 states and 72402 transitions. Second operand 7 states. [2020-10-15 03:51:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:51:20,086 INFO L93 Difference]: Finished difference Result 125820 states and 183880 transitions. [2020-10-15 03:51:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:51:20,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-15 03:51:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:51:20,186 INFO L225 Difference]: With dead ends: 125820 [2020-10-15 03:51:20,186 INFO L226 Difference]: Without dead ends: 81162 [2020-10-15 03:51:20,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:51:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81162 states. [2020-10-15 03:51:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81162 to 81156. [2020-10-15 03:51:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81156 states. [2020-10-15 03:51:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81156 states to 81156 states and 117588 transitions. [2020-10-15 03:51:26,697 INFO L78 Accepts]: Start accepts. Automaton has 81156 states and 117588 transitions. Word has length 83 [2020-10-15 03:51:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:51:26,697 INFO L479 AbstractCegarLoop]: Abstraction has 81156 states and 117588 transitions. [2020-10-15 03:51:26,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:51:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 81156 states and 117588 transitions. [2020-10-15 03:51:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:51:26,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:51:26,709 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 03:51:26,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:51:26,709 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:51:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:51:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1699624691, now seen corresponding path program 1 times [2020-10-15 03:51:26,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:51:26,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28666097] [2020-10-15 03:51:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:51:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:26,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:26,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:26,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:27,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:27,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:31,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:31,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:51:31,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:51:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:51:31,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:31,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:51:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:51:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 03:51:31,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:51:31,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:51:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:31,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:31,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:51:31,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:51:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:51:31,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:31,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:51:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:51:31,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:51:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:51:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 03:51:31,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28666097] [2020-10-15 03:51:31,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:51:31,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:51:31,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827842000] [2020-10-15 03:51:31,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:51:31,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:51:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:51:31,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:51:31,926 INFO L87 Difference]: Start difference. First operand 81156 states and 117588 transitions. Second operand 7 states. [2020-10-15 03:51:32,081 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:51:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:51:42,029 INFO L93 Difference]: Finished difference Result 159567 states and 231703 transitions. [2020-10-15 03:51:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:51:42,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-15 03:51:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:51:42,237 INFO L225 Difference]: With dead ends: 159567 [2020-10-15 03:51:42,237 INFO L226 Difference]: Without dead ends: 128835 [2020-10-15 03:51:42,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:51:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128835 states. [2020-10-15 03:51:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128835 to 96931. [2020-10-15 03:51:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96931 states. [2020-10-15 03:51:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96931 states to 96931 states and 140394 transitions. [2020-10-15 03:51:48,543 INFO L78 Accepts]: Start accepts. Automaton has 96931 states and 140394 transitions. Word has length 83 [2020-10-15 03:51:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:51:48,543 INFO L479 AbstractCegarLoop]: Abstraction has 96931 states and 140394 transitions. [2020-10-15 03:51:48,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:51:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 96931 states and 140394 transitions. [2020-10-15 03:51:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:51:48,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:51:48,555 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 03:51:48,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:51:48,555 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:51:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:51:48,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2108506774, now seen corresponding path program 1 times [2020-10-15 03:51:48,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:51:48,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135287850] [2020-10-15 03:51:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:51:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:48,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:49,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:49,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:53,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:53,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:51:53,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 03:51:53,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:51:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:51:53,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:51:53,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:51:53,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:51:53,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:51:53,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:51:53,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:51:53,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:51:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:51:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:51:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:51:53,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:51:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-15 03:51:53,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135287850] [2020-10-15 03:51:53,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:51:53,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:51:53,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23852573] [2020-10-15 03:51:53,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:51:53,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:51:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:51:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:51:53,890 INFO L87 Difference]: Start difference. First operand 96931 states and 140394 transitions. Second operand 7 states. [2020-10-15 03:51:54,051 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:52:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:52:03,773 INFO L93 Difference]: Finished difference Result 153000 states and 221714 transitions. [2020-10-15 03:52:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:52:03,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-15 03:52:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:52:03,981 INFO L225 Difference]: With dead ends: 153000 [2020-10-15 03:52:03,981 INFO L226 Difference]: Without dead ends: 137038 [2020-10-15 03:52:04,011 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 03:52:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137038 states. [2020-10-15 03:52:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137038 to 105116. [2020-10-15 03:52:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105116 states. [2020-10-15 03:52:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105116 states to 105116 states and 152205 transitions. [2020-10-15 03:52:11,109 INFO L78 Accepts]: Start accepts. Automaton has 105116 states and 152205 transitions. Word has length 83 [2020-10-15 03:52:11,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:52:11,109 INFO L479 AbstractCegarLoop]: Abstraction has 105116 states and 152205 transitions. [2020-10-15 03:52:11,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:52:11,109 INFO L276 IsEmpty]: Start isEmpty. Operand 105116 states and 152205 transitions. [2020-10-15 03:52:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 03:52:11,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:52:11,117 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, 1, 1] [2020-10-15 03:52:11,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:52:11,118 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:52:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:52:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1281242117, now seen corresponding path program 1 times [2020-10-15 03:52:11,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:52:11,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098958482] [2020-10-15 03:52:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:52:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:17,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:17,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 03:52:17,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:52:17,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6631 [2020-10-15 03:52:17,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:17,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:17,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:52:17,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:52:17,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 03:52:17,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:17,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:52:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:17,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:17,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:52:17,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:52:17,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:52:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:52:17,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098958482] [2020-10-15 03:52:17,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:52:17,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:52:17,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248216962] [2020-10-15 03:52:17,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:52:17,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:52:17,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:52:17,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:52:17,941 INFO L87 Difference]: Start difference. First operand 105116 states and 152205 transitions. Second operand 7 states. [2020-10-15 03:52:18,095 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:52:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:52:27,555 INFO L93 Difference]: Finished difference Result 160523 states and 232555 transitions. [2020-10-15 03:52:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:52:27,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-15 03:52:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:52:27,792 INFO L225 Difference]: With dead ends: 160523 [2020-10-15 03:52:27,793 INFO L226 Difference]: Without dead ends: 145637 [2020-10-15 03:52:27,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:52:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145637 states. [2020-10-15 03:52:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145637 to 111358. [2020-10-15 03:52:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111358 states. [2020-10-15 03:52:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111358 states to 111358 states and 161188 transitions. [2020-10-15 03:52:35,958 INFO L78 Accepts]: Start accepts. Automaton has 111358 states and 161188 transitions. Word has length 84 [2020-10-15 03:52:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:52:35,959 INFO L479 AbstractCegarLoop]: Abstraction has 111358 states and 161188 transitions. [2020-10-15 03:52:35,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:52:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 111358 states and 161188 transitions. [2020-10-15 03:52:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 03:52:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:52:35,969 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, 1, 1, 1] [2020-10-15 03:52:35,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:52:35,969 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:52:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:52:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 947913171, now seen corresponding path program 1 times [2020-10-15 03:52:35,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:52:35,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765093197] [2020-10-15 03:52:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:52:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:37,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 03:52:40,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:52:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 03:52:40,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:40,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:52:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:52:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 03:52:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:41,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:52:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:52:41,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:52:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:52:41,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:52:41,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:52:41,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:52:41,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:52:41,193 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 03:52:41,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765093197] [2020-10-15 03:52:41,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:52:41,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:52:41,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088674399] [2020-10-15 03:52:41,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:52:41,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:52:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:52:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:52:41,195 INFO L87 Difference]: Start difference. First operand 111358 states and 161188 transitions. Second operand 8 states. [2020-10-15 03:52:41,350 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:52:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:52:59,506 INFO L93 Difference]: Finished difference Result 296760 states and 430211 transitions. [2020-10-15 03:52:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:52:59,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-15 03:52:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:52:59,855 INFO L225 Difference]: With dead ends: 296760 [2020-10-15 03:52:59,855 INFO L226 Difference]: Without dead ends: 241605 [2020-10-15 03:52:59,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:53:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241605 states. [2020-10-15 03:53:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241605 to 136388. [2020-10-15 03:53:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136388 states. [2020-10-15 03:53:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136388 states to 136388 states and 198363 transitions. [2020-10-15 03:53:13,999 INFO L78 Accepts]: Start accepts. Automaton has 136388 states and 198363 transitions. Word has length 86 [2020-10-15 03:53:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:53:13,999 INFO L479 AbstractCegarLoop]: Abstraction has 136388 states and 198363 transitions. [2020-10-15 03:53:13,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:53:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 136388 states and 198363 transitions. [2020-10-15 03:53:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 03:53:14,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:53:14,010 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, 1, 1, 1] [2020-10-15 03:53:14,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:53:14,010 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:53:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:53:14,010 INFO L82 PathProgramCache]: Analyzing trace with hash 821455261, now seen corresponding path program 1 times [2020-10-15 03:53:14,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:53:14,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943783221] [2020-10-15 03:53:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:53:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:53:14,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:14,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:18,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:18,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:19,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:53:19,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 03:53:19,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:53:19,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:53:19,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:53:19,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:53:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:53:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:53:19,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-15 03:53:19,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:53:19,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:53:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:53:19,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:53:19,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:53:19,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:53:19,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:53:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:53:19,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:53:19,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:53:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:53:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:53:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:53:19,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:53:19,308 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 03:53:19,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943783221] [2020-10-15 03:53:19,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:53:19,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:53:19,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318672068] [2020-10-15 03:53:19,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:53:19,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:53:19,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:53:19,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:53:19,310 INFO L87 Difference]: Start difference. First operand 136388 states and 198363 transitions. Second operand 8 states. [2020-10-15 03:53:19,448 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:53:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:53:51,353 INFO L93 Difference]: Finished difference Result 458827 states and 665265 transitions. [2020-10-15 03:53:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:53:51,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-15 03:53:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted.