/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:11:06,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:11:06,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:11:06,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:11:06,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:11:06,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:11:06,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:11:06,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:11:06,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:11:06,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:11:06,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:11:06,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:11:06,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:11:06,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:11:06,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:11:06,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:11:06,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:11:06,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:11:06,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:11:06,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:11:06,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:11:06,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:11:06,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:11:06,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:11:06,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:11:06,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:11:06,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:11:06,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:11:06,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:11:06,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:11:06,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:11:06,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:11:06,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:11:06,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:11:06,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:11:06,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:11:06,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:11:06,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:11:06,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:11:06,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:11:06,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:11:06,185 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 [2020-10-14 09:11:06,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:11:06,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:11:06,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:11:06,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:11:06,231 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:11:06,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:11:06,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:11:06,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:11:06,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:11:06,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:11:06,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:11:06,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:11:06,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:11:06,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:11:06,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:11:06,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:11:06,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:11:06,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:11:06,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:11:06,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:11:06,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:11:06,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:11:06,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:11:06,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:11:06,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:11:06,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:11:06,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:11:06,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:11:06,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:11:06,237 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:11:06,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:11:06,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:11:06,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:11:06,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:11:06,573 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:11:06,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:11:06,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e140b749/f3a81cbaae4a425e83fe52dbd0775548/FLAGfe7c44f9f [2020-10-14 09:11:07,146 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:11:07,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:11:07,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e140b749/f3a81cbaae4a425e83fe52dbd0775548/FLAGfe7c44f9f [2020-10-14 09:11:07,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e140b749/f3a81cbaae4a425e83fe52dbd0775548 [2020-10-14 09:11:07,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:11:07,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:11:07,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:11:07,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:11:07,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:11:07,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336ce4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07, skipping insertion in model container [2020-10-14 09:11:07,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:11:07,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:11:07,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:11:07,792 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:11:07,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:11:07,964 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:11:07,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07 WrapperNode [2020-10-14 09:11:07,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:11:07,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:11:07,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:11:07,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:11:07,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:07,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:08,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:08,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... [2020-10-14 09:11:08,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:11:08,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:11:08,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:11:08,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:11:08,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:11:08,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:11:08,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:11:08,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:11:08,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:11:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:11:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:11:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:11:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:11:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:11:08,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:11:08,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:11:08,771 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:11:08,771 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:11:08,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:11:08 BoogieIcfgContainer [2020-10-14 09:11:08,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:11:08,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:11:08,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:11:08,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:11:08,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:11:07" (1/3) ... [2020-10-14 09:11:08,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7717e8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:11:08, skipping insertion in model container [2020-10-14 09:11:08,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:11:07" (2/3) ... [2020-10-14 09:11:08,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7717e8f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:11:08, skipping insertion in model container [2020-10-14 09:11:08,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:11:08" (3/3) ... [2020-10-14 09:11:08,793 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:11:08,805 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:11:08,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:11:08,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:11:08,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:11:08,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:11:08,853 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:11:08,854 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:11:08,854 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:11:08,854 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:11:08,854 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:11:08,854 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:11:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-10-14 09:11:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 09:11:08,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:08,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:11:08,883 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:08,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:08,888 INFO L82 PathProgramCache]: Analyzing trace with hash 794325759, now seen corresponding path program 1 times [2020-10-14 09:11:08,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:08,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415446181] [2020-10-14 09:11:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:09,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:11,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:11,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 09:11:11,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:11:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1909 [2020-10-14 09:11:11,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:11,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:11:11,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:11:11,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:11:11,299 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:11:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:11,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:11,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:11,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:11,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:11,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:11:11,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:11,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:11,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:11,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415446181] [2020-10-14 09:11:11,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:11,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:11,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247176351] [2020-10-14 09:11:11,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:11,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:11,383 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 4 states. [2020-10-14 09:11:11,585 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:12,089 INFO L93 Difference]: Finished difference Result 258 states and 408 transitions. [2020-10-14 09:11:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:12,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-14 09:11:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:12,104 INFO L225 Difference]: With dead ends: 258 [2020-10-14 09:11:12,105 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 09:11:12,109 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 [2020-10-14 09:11:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 09:11:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-14 09:11:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 09:11:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2020-10-14 09:11:12,168 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 52 [2020-10-14 09:11:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2020-10-14 09:11:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2020-10-14 09:11:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 09:11:12,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:12,172 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] [2020-10-14 09:11:12,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:11:12,172 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash -493854058, now seen corresponding path program 1 times [2020-10-14 09:11:12,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:12,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262721349] [2020-10-14 09:11:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:12,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:12,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:12,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:12,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 09:11:12,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:11:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-14 09:11:12,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:12,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:11:12,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:11:12,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:13,172 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:11:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:13,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:13,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:13,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:13,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:11:13,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:13,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:13,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:13,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:13,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262721349] [2020-10-14 09:11:13,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:13,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:13,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062800017] [2020-10-14 09:11:13,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:13,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:13,219 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand 4 states. [2020-10-14 09:11:13,416 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:13,894 INFO L93 Difference]: Finished difference Result 407 states and 627 transitions. [2020-10-14 09:11:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:13,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 09:11:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:13,908 INFO L225 Difference]: With dead ends: 407 [2020-10-14 09:11:13,908 INFO L226 Difference]: Without dead ends: 271 [2020-10-14 09:11:13,910 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 [2020-10-14 09:11:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-14 09:11:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-14 09:11:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-14 09:11:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 408 transitions. [2020-10-14 09:11:13,948 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 408 transitions. Word has length 53 [2020-10-14 09:11:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:13,948 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 408 transitions. [2020-10-14 09:11:13,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 408 transitions. [2020-10-14 09:11:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:11:13,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:13,950 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] [2020-10-14 09:11:13,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:11:13,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1850918440, now seen corresponding path program 1 times [2020-10-14 09:11:13,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:13,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017601616] [2020-10-14 09:11:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:14,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:14,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:14,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:11:14,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:14,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-14 09:11:14,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:14,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:11:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:11:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:14,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:14,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:14,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:11:14,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:14,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:14,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017601616] [2020-10-14 09:11:14,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:14,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:14,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327481842] [2020-10-14 09:11:14,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:14,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:14,520 INFO L87 Difference]: Start difference. First operand 269 states and 408 transitions. Second operand 4 states. [2020-10-14 09:11:14,645 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:15,115 INFO L93 Difference]: Finished difference Result 681 states and 1058 transitions. [2020-10-14 09:11:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:15,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:11:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:15,119 INFO L225 Difference]: With dead ends: 681 [2020-10-14 09:11:15,119 INFO L226 Difference]: Without dead ends: 443 [2020-10-14 09:11:15,121 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 [2020-10-14 09:11:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-14 09:11:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2020-10-14 09:11:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-14 09:11:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 676 transitions. [2020-10-14 09:11:15,159 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 676 transitions. Word has length 54 [2020-10-14 09:11:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:15,159 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 676 transitions. [2020-10-14 09:11:15,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 676 transitions. [2020-10-14 09:11:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:11:15,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:15,162 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] [2020-10-14 09:11:15,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:11:15,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash 996649111, now seen corresponding path program 1 times [2020-10-14 09:11:15,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:15,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387978760] [2020-10-14 09:11:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:15,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:16,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:16,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:11:16,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-14 09:11:16,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:16,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:11:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:11:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 09:11:16,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:16,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:16,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:16,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:16,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:11:16,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:16,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:16,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:16,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387978760] [2020-10-14 09:11:16,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:16,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:11:16,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689882020] [2020-10-14 09:11:16,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:11:16,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:11:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:11:16,338 INFO L87 Difference]: Start difference. First operand 441 states and 676 transitions. Second operand 7 states. [2020-10-14 09:11:16,525 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-14 09:11:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:17,030 INFO L93 Difference]: Finished difference Result 2491 states and 3901 transitions. [2020-10-14 09:11:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:11:17,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-14 09:11:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:17,048 INFO L225 Difference]: With dead ends: 2491 [2020-10-14 09:11:17,048 INFO L226 Difference]: Without dead ends: 2081 [2020-10-14 09:11:17,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:11:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2020-10-14 09:11:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 849. [2020-10-14 09:11:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 849 states. [2020-10-14 09:11:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1304 transitions. [2020-10-14 09:11:17,170 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1304 transitions. Word has length 55 [2020-10-14 09:11:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:17,172 INFO L479 AbstractCegarLoop]: Abstraction has 849 states and 1304 transitions. [2020-10-14 09:11:17,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:11:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1304 transitions. [2020-10-14 09:11:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:11:17,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:17,183 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] [2020-10-14 09:11:17,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:11:17,184 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash 812818619, now seen corresponding path program 1 times [2020-10-14 09:11:17,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:17,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261764666] [2020-10-14 09:11:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:17,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:17,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:17,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:11:17,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:17,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-14 09:11:17,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:17,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:11:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 09:11:17,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:11:17,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:17,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:17,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:17,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:17,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:17,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:17,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:11:17,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:17,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:17,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261764666] [2020-10-14 09:11:17,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:17,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:11:17,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820767473] [2020-10-14 09:11:17,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:11:17,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:17,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:11:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:11:17,808 INFO L87 Difference]: Start difference. First operand 849 states and 1304 transitions. Second operand 5 states. [2020-10-14 09:11:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:18,532 INFO L93 Difference]: Finished difference Result 1699 states and 2609 transitions. [2020-10-14 09:11:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:11:18,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-14 09:11:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:18,545 INFO L225 Difference]: With dead ends: 1699 [2020-10-14 09:11:18,545 INFO L226 Difference]: Without dead ends: 1697 [2020-10-14 09:11:18,546 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 [2020-10-14 09:11:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-10-14 09:11:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 881. [2020-10-14 09:11:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2020-10-14 09:11:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1336 transitions. [2020-10-14 09:11:18,629 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1336 transitions. Word has length 56 [2020-10-14 09:11:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:18,630 INFO L479 AbstractCegarLoop]: Abstraction has 881 states and 1336 transitions. [2020-10-14 09:11:18,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:11:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1336 transitions. [2020-10-14 09:11:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:11:18,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:18,631 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] [2020-10-14 09:11:18,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:11:18,631 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash -562806842, now seen corresponding path program 1 times [2020-10-14 09:11:18,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:18,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832833977] [2020-10-14 09:11:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:18,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:19,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:19,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:11:19,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 09:11:19,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:19,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:11:19,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 09:11:19,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:19,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:19,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:19,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:19,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:19,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:11:19,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:19,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:19,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:19,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832833977] [2020-10-14 09:11:19,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:19,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:19,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322635069] [2020-10-14 09:11:19,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:19,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:19,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:19,216 INFO L87 Difference]: Start difference. First operand 881 states and 1336 transitions. Second operand 4 states. [2020-10-14 09:11:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:19,811 INFO L93 Difference]: Finished difference Result 2469 states and 3754 transitions. [2020-10-14 09:11:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:19,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 09:11:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:19,820 INFO L225 Difference]: With dead ends: 2469 [2020-10-14 09:11:19,821 INFO L226 Difference]: Without dead ends: 1619 [2020-10-14 09:11:19,823 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 [2020-10-14 09:11:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2020-10-14 09:11:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1601. [2020-10-14 09:11:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-10-14 09:11:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2400 transitions. [2020-10-14 09:11:19,944 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2400 transitions. Word has length 57 [2020-10-14 09:11:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:19,944 INFO L479 AbstractCegarLoop]: Abstraction has 1601 states and 2400 transitions. [2020-10-14 09:11:19,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2400 transitions. [2020-10-14 09:11:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 09:11:19,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:19,946 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] [2020-10-14 09:11:19,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:11:19,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1526236308, now seen corresponding path program 1 times [2020-10-14 09:11:19,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:19,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338329064] [2020-10-14 09:11:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:19,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:20,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 09:11:20,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-14 09:11:20,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:20,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:11:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:11:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:20,323 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:11:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:20,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:20,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:11:20,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:20,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:20,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:20,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:20,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338329064] [2020-10-14 09:11:20,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:20,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:20,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907990175] [2020-10-14 09:11:20,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:20,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:20,363 INFO L87 Difference]: Start difference. First operand 1601 states and 2400 transitions. Second operand 4 states. [2020-10-14 09:11:20,531 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:21,245 INFO L93 Difference]: Finished difference Result 3096 states and 4678 transitions. [2020-10-14 09:11:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:21,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-14 09:11:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:21,258 INFO L225 Difference]: With dead ends: 3096 [2020-10-14 09:11:21,258 INFO L226 Difference]: Without dead ends: 2245 [2020-10-14 09:11:21,261 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 [2020-10-14 09:11:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-10-14 09:11:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2243. [2020-10-14 09:11:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2243 states. [2020-10-14 09:11:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 3354 transitions. [2020-10-14 09:11:21,442 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 3354 transitions. Word has length 59 [2020-10-14 09:11:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:21,442 INFO L479 AbstractCegarLoop]: Abstraction has 2243 states and 3354 transitions. [2020-10-14 09:11:21,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 3354 transitions. [2020-10-14 09:11:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:11:21,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:21,445 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:11:21,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:11:21,446 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1607671820, now seen corresponding path program 1 times [2020-10-14 09:11:21,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:21,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270870934] [2020-10-14 09:11:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:21,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:21,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:26,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:26,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:11:26,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:11:26,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 09:11:26,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:26,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 09:11:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:11:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:26,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:26,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:26,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:26,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:26,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:11:26,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:26,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:26,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:26,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270870934] [2020-10-14 09:11:26,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:26,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:26,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314061446] [2020-10-14 09:11:26,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:26,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:26,692 INFO L87 Difference]: Start difference. First operand 2243 states and 3354 transitions. Second operand 4 states. [2020-10-14 09:11:26,827 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:27,479 INFO L93 Difference]: Finished difference Result 6399 states and 9564 transitions. [2020-10-14 09:11:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:27,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 09:11:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:27,502 INFO L225 Difference]: With dead ends: 6399 [2020-10-14 09:11:27,502 INFO L226 Difference]: Without dead ends: 4189 [2020-10-14 09:11:27,516 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 [2020-10-14 09:11:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2020-10-14 09:11:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 4187. [2020-10-14 09:11:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4187 states. [2020-10-14 09:11:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 6194 transitions. [2020-10-14 09:11:27,816 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 6194 transitions. Word has length 79 [2020-10-14 09:11:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:27,816 INFO L479 AbstractCegarLoop]: Abstraction has 4187 states and 6194 transitions. [2020-10-14 09:11:27,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 6194 transitions. [2020-10-14 09:11:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:11:27,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:27,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:11:27,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:11:27,821 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1208844627, now seen corresponding path program 1 times [2020-10-14 09:11:27,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:27,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136585737] [2020-10-14 09:11:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:28,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:28,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:28,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:32,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:32,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:11:32,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:11:32,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:11:32,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:32,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:32,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:32,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:11:32,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:11:32,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:32,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:32,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:32,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:33,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:33,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:11:33,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:33,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:33,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136585737] [2020-10-14 09:11:33,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:33,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:33,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569988672] [2020-10-14 09:11:33,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:33,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:33,029 INFO L87 Difference]: Start difference. First operand 4187 states and 6194 transitions. Second operand 4 states. [2020-10-14 09:11:33,211 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:34,479 INFO L93 Difference]: Finished difference Result 11967 states and 17652 transitions. [2020-10-14 09:11:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:34,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 09:11:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:34,532 INFO L225 Difference]: With dead ends: 11967 [2020-10-14 09:11:34,533 INFO L226 Difference]: Without dead ends: 7813 [2020-10-14 09:11:34,549 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 [2020-10-14 09:11:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2020-10-14 09:11:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 7811. [2020-10-14 09:11:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7811 states. [2020-10-14 09:11:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7811 states to 7811 states and 11394 transitions. [2020-10-14 09:11:35,181 INFO L78 Accepts]: Start accepts. Automaton has 7811 states and 11394 transitions. Word has length 79 [2020-10-14 09:11:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:35,182 INFO L479 AbstractCegarLoop]: Abstraction has 7811 states and 11394 transitions. [2020-10-14 09:11:35,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7811 states and 11394 transitions. [2020-10-14 09:11:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:11:35,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:35,192 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:11:35,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:11:35,193 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 722008796, now seen corresponding path program 1 times [2020-10-14 09:11:35,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:35,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165548583] [2020-10-14 09:11:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:35,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:35,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:35,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:39,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:39,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:11:39,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:11:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4270 [2020-10-14 09:11:39,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:39,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:11:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:11:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:11:39,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:39,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:39,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:39,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:39,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:39,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165548583] [2020-10-14 09:11:39,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:39,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:39,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650689915] [2020-10-14 09:11:39,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:39,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:39,646 INFO L87 Difference]: Start difference. First operand 7811 states and 11394 transitions. Second operand 4 states. [2020-10-14 09:11:39,827 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:41,257 INFO L93 Difference]: Finished difference Result 22311 states and 32388 transitions. [2020-10-14 09:11:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:41,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 09:11:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:41,320 INFO L225 Difference]: With dead ends: 22311 [2020-10-14 09:11:41,320 INFO L226 Difference]: Without dead ends: 14533 [2020-10-14 09:11:41,338 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 [2020-10-14 09:11:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14533 states. [2020-10-14 09:11:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14533 to 14531. [2020-10-14 09:11:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14531 states. [2020-10-14 09:11:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14531 states to 14531 states and 20834 transitions. [2020-10-14 09:11:42,260 INFO L78 Accepts]: Start accepts. Automaton has 14531 states and 20834 transitions. Word has length 79 [2020-10-14 09:11:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:42,260 INFO L479 AbstractCegarLoop]: Abstraction has 14531 states and 20834 transitions. [2020-10-14 09:11:42,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 14531 states and 20834 transitions. [2020-10-14 09:11:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:11:42,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:42,272 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] [2020-10-14 09:11:42,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:11:42,272 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2070406095, now seen corresponding path program 1 times [2020-10-14 09:11:42,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:42,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506632972] [2020-10-14 09:11:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:42,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:42,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:42,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:42,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:11:42,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:11:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-14 09:11:42,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:42,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:11:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:11:42,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:11:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:11:42,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:42,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:42,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:42,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:42,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:11:42,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:42,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:43,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:11:43,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506632972] [2020-10-14 09:11:43,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:11:43,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:11:43,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78118177] [2020-10-14 09:11:43,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:11:43,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:11:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:11:43,028 INFO L87 Difference]: Start difference. First operand 14531 states and 20834 transitions. Second operand 5 states. [2020-10-14 09:11:43,185 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:11:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:44,798 INFO L93 Difference]: Finished difference Result 33737 states and 48613 transitions. [2020-10-14 09:11:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:11:44,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-14 09:11:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:44,855 INFO L225 Difference]: With dead ends: 33737 [2020-10-14 09:11:44,855 INFO L226 Difference]: Without dead ends: 23943 [2020-10-14 09:11:44,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:11:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23943 states. [2020-10-14 09:11:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23943 to 23811. [2020-10-14 09:11:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23811 states. [2020-10-14 09:11:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23811 states to 23811 states and 33890 transitions. [2020-10-14 09:11:46,070 INFO L78 Accepts]: Start accepts. Automaton has 23811 states and 33890 transitions. Word has length 80 [2020-10-14 09:11:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:46,070 INFO L479 AbstractCegarLoop]: Abstraction has 23811 states and 33890 transitions. [2020-10-14 09:11:46,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:11:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 23811 states and 33890 transitions. [2020-10-14 09:11:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:11:46,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:46,080 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:11:46,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:11:46,080 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1636973195, now seen corresponding path program 1 times [2020-10-14 09:11:46,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:46,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975263185] [2020-10-14 09:11:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:46,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:47,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:11:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:11:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3425 [2020-10-14 09:11:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:49,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 09:11:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:11:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:49,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:49,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:49,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:11:49,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:49,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:49,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975263185] [2020-10-14 09:11:49,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:49,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:49,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444703950] [2020-10-14 09:11:49,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:49,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:49,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:49,682 INFO L87 Difference]: Start difference. First operand 23811 states and 33890 transitions. Second operand 4 states. [2020-10-14 09:11:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:50,793 INFO L93 Difference]: Finished difference Result 40959 states and 58281 transitions. [2020-10-14 09:11:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:11:50,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:11:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:50,832 INFO L225 Difference]: With dead ends: 40959 [2020-10-14 09:11:50,832 INFO L226 Difference]: Without dead ends: 17181 [2020-10-14 09:11:50,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17181 states. [2020-10-14 09:11:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17181 to 17179. [2020-10-14 09:11:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17179 states. [2020-10-14 09:11:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17179 states to 17179 states and 24159 transitions. [2020-10-14 09:11:51,690 INFO L78 Accepts]: Start accepts. Automaton has 17179 states and 24159 transitions. Word has length 81 [2020-10-14 09:11:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:51,690 INFO L479 AbstractCegarLoop]: Abstraction has 17179 states and 24159 transitions. [2020-10-14 09:11:51,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 17179 states and 24159 transitions. [2020-10-14 09:11:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:11:51,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:51,695 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] [2020-10-14 09:11:51,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:11:51,696 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -374352691, now seen corresponding path program 1 times [2020-10-14 09:11:51,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:51,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202415495] [2020-10-14 09:11:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:51,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:51,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:53,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:53,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:11:53,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:11:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2072 [2020-10-14 09:11:53,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:53,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:11:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:11:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:11:53,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:53,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:53,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:53,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:53,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:53,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:11:53,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:53,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:53,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:53,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:53,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:53,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:11:53,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202415495] [2020-10-14 09:11:53,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:11:53,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:11:53,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670610756] [2020-10-14 09:11:53,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:11:53,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:11:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:11:53,934 INFO L87 Difference]: Start difference. First operand 17179 states and 24159 transitions. Second operand 4 states. [2020-10-14 09:11:54,077 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:11:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:11:55,612 INFO L93 Difference]: Finished difference Result 49244 states and 69008 transitions. [2020-10-14 09:11:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:11:55,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:11:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:11:55,685 INFO L225 Difference]: With dead ends: 49244 [2020-10-14 09:11:55,686 INFO L226 Difference]: Without dead ends: 32290 [2020-10-14 09:11:55,718 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 [2020-10-14 09:11:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32290 states. [2020-10-14 09:11:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32290 to 32288. [2020-10-14 09:11:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32288 states. [2020-10-14 09:11:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32288 states to 32288 states and 44769 transitions. [2020-10-14 09:11:57,242 INFO L78 Accepts]: Start accepts. Automaton has 32288 states and 44769 transitions. Word has length 81 [2020-10-14 09:11:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:11:57,242 INFO L479 AbstractCegarLoop]: Abstraction has 32288 states and 44769 transitions. [2020-10-14 09:11:57,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:11:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32288 states and 44769 transitions. [2020-10-14 09:11:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:11:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:11:57,250 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] [2020-10-14 09:11:57,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:11:57,250 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:11:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:11:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1310934823, now seen corresponding path program 1 times [2020-10-14 09:11:57,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:11:57,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144819605] [2020-10-14 09:11:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:11:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:58,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:11:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:58,820 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:11:58,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:11:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:11:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:11:58,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:11:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:11:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:11:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:11:58,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:11:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:11:58,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144819605] [2020-10-14 09:11:58,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:11:58,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:11:58,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793224095] [2020-10-14 09:11:58,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:11:58,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:11:58,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:11:58,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:11:58,851 INFO L87 Difference]: Start difference. First operand 32288 states and 44769 transitions. Second operand 7 states. [2020-10-14 09:11:59,006 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:12:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:04,575 INFO L93 Difference]: Finished difference Result 112988 states and 159299 transitions. [2020-10-14 09:12:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:12:04,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-14 09:12:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:04,754 INFO L225 Difference]: With dead ends: 112988 [2020-10-14 09:12:04,754 INFO L226 Difference]: Without dead ends: 100986 [2020-10-14 09:12:04,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:12:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100986 states. [2020-10-14 09:12:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100986 to 51666. [2020-10-14 09:12:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51666 states. [2020-10-14 09:12:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51666 states to 51666 states and 71660 transitions. [2020-10-14 09:12:07,606 INFO L78 Accepts]: Start accepts. Automaton has 51666 states and 71660 transitions. Word has length 83 [2020-10-14 09:12:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:07,607 INFO L479 AbstractCegarLoop]: Abstraction has 51666 states and 71660 transitions. [2020-10-14 09:12:07,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:12:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 51666 states and 71660 transitions. [2020-10-14 09:12:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:12:07,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:07,614 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] [2020-10-14 09:12:07,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:12:07,615 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash -575603446, now seen corresponding path program 1 times [2020-10-14 09:12:07,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:07,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812997521] [2020-10-14 09:12:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:07,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:07,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:07,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:07,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:07,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:09,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:09,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:12:09,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:12:09,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:09,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:09,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:09,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:12:09,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812997521] [2020-10-14 09:12:09,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:09,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:12:09,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007055468] [2020-10-14 09:12:09,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:12:09,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:12:09,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:12:09,226 INFO L87 Difference]: Start difference. First operand 51666 states and 71660 transitions. Second operand 7 states. [2020-10-14 09:12:09,388 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:12:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:16,226 INFO L93 Difference]: Finished difference Result 128732 states and 179879 transitions. [2020-10-14 09:12:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:12:16,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-14 09:12:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:16,363 INFO L225 Difference]: With dead ends: 128732 [2020-10-14 09:12:16,364 INFO L226 Difference]: Without dead ends: 108546 [2020-10-14 09:12:16,401 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 [2020-10-14 09:12:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108546 states. [2020-10-14 09:12:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108546 to 58271. [2020-10-14 09:12:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58271 states. [2020-10-14 09:12:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58271 states to 58271 states and 80816 transitions. [2020-10-14 09:12:19,692 INFO L78 Accepts]: Start accepts. Automaton has 58271 states and 80816 transitions. Word has length 83 [2020-10-14 09:12:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:19,692 INFO L479 AbstractCegarLoop]: Abstraction has 58271 states and 80816 transitions. [2020-10-14 09:12:19,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:12:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58271 states and 80816 transitions. [2020-10-14 09:12:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:12:19,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:19,697 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] [2020-10-14 09:12:19,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:12:19,698 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -529998399, now seen corresponding path program 1 times [2020-10-14 09:12:19,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:19,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481488752] [2020-10-14 09:12:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:19,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:12:20,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:12:20,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:12:20,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:20,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:20,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:20,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 09:12:20,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481488752] [2020-10-14 09:12:20,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:20,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:12:20,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349599242] [2020-10-14 09:12:20,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:12:20,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:12:20,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:12:20,944 INFO L87 Difference]: Start difference. First operand 58271 states and 80816 transitions. Second operand 7 states. [2020-10-14 09:12:21,100 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:12:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:28,180 INFO L93 Difference]: Finished difference Result 133408 states and 186295 transitions. [2020-10-14 09:12:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:12:28,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-14 09:12:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:28,307 INFO L225 Difference]: With dead ends: 133408 [2020-10-14 09:12:28,308 INFO L226 Difference]: Without dead ends: 113454 [2020-10-14 09:12:28,342 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 [2020-10-14 09:12:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113454 states. [2020-10-14 09:12:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113454 to 64529. [2020-10-14 09:12:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64529 states. [2020-10-14 09:12:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64529 states to 64529 states and 89456 transitions. [2020-10-14 09:12:32,002 INFO L78 Accepts]: Start accepts. Automaton has 64529 states and 89456 transitions. Word has length 83 [2020-10-14 09:12:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:32,002 INFO L479 AbstractCegarLoop]: Abstraction has 64529 states and 89456 transitions. [2020-10-14 09:12:32,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:12:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64529 states and 89456 transitions. [2020-10-14 09:12:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:12:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:32,008 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] [2020-10-14 09:12:32,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:12:32,009 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1775628471, now seen corresponding path program 1 times [2020-10-14 09:12:32,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:32,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785819769] [2020-10-14 09:12:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:32,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:32,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:33,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:33,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:12:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:12:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 09:12:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:33,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:33,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:33,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:33,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:33,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:33,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:12:33,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785819769] [2020-10-14 09:12:33,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:33,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:12:33,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232294615] [2020-10-14 09:12:33,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:12:33,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:12:33,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:12:33,528 INFO L87 Difference]: Start difference. First operand 64529 states and 89456 transitions. Second operand 7 states. [2020-10-14 09:12:33,690 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:12:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:41,788 INFO L93 Difference]: Finished difference Result 144923 states and 202143 transitions. [2020-10-14 09:12:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:12:41,789 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:12:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:41,937 INFO L225 Difference]: With dead ends: 144923 [2020-10-14 09:12:41,937 INFO L226 Difference]: Without dead ends: 121977 [2020-10-14 09:12:41,971 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 [2020-10-14 09:12:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121977 states. [2020-10-14 09:12:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121977 to 71072. [2020-10-14 09:12:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71072 states. [2020-10-14 09:12:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71072 states to 71072 states and 98541 transitions. [2020-10-14 09:12:46,383 INFO L78 Accepts]: Start accepts. Automaton has 71072 states and 98541 transitions. Word has length 84 [2020-10-14 09:12:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:46,383 INFO L479 AbstractCegarLoop]: Abstraction has 71072 states and 98541 transitions. [2020-10-14 09:12:46,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:12:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 71072 states and 98541 transitions. [2020-10-14 09:12:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 09:12:46,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:46,390 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, 1, 1, 1, 1] [2020-10-14 09:12:46,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:12:46,391 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -78262721, now seen corresponding path program 1 times [2020-10-14 09:12:46,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:46,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155820916] [2020-10-14 09:12:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:51,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:12:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 09:12:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 09:12:51,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:51,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:51,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:51,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:51,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:51,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155820916] [2020-10-14 09:12:51,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:51,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:12:51,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953403232] [2020-10-14 09:12:51,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:12:51,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:12:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:12:51,571 INFO L87 Difference]: Start difference. First operand 71072 states and 98541 transitions. Second operand 6 states. [2020-10-14 09:12:51,700 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 09:13:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:13,751 INFO L93 Difference]: Finished difference Result 385861 states and 533083 transitions. [2020-10-14 09:13:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:13:13,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-14 09:13:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:14,176 INFO L225 Difference]: With dead ends: 385861 [2020-10-14 09:13:14,176 INFO L226 Difference]: Without dead ends: 317197 [2020-10-14 09:13:14,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:13:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317197 states. [2020-10-14 09:13:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317197 to 245261. [2020-10-14 09:13:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245261 states. [2020-10-14 09:13:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245261 states to 245261 states and 337100 transitions. [2020-10-14 09:13:37,331 INFO L78 Accepts]: Start accepts. Automaton has 245261 states and 337100 transitions. Word has length 88 [2020-10-14 09:13:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:37,332 INFO L479 AbstractCegarLoop]: Abstraction has 245261 states and 337100 transitions. [2020-10-14 09:13:37,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:13:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 245261 states and 337100 transitions. [2020-10-14 09:13:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 09:13:37,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:37,349 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, 1, 1, 1, 1] [2020-10-14 09:13:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:13:37,350 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash 467240314, now seen corresponding path program 1 times [2020-10-14 09:13:37,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:37,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927975832] [2020-10-14 09:13:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:37,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:37,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:42,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:13:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:13:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:13:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:42,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:42,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:42,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:42,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927975832] [2020-10-14 09:13:42,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:13:42,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:13:42,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145883158] [2020-10-14 09:13:42,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:13:42,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:42,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:13:42,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:13:42,517 INFO L87 Difference]: Start difference. First operand 245261 states and 337100 transitions. Second operand 6 states.