/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/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:29:00,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:29:00,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:29:00,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:29:00,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:29:00,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:29:00,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:29:00,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:29:00,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:29:00,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:29:00,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:29:00,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:29:00,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:29:00,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:29:00,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:29:00,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:29:00,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:29:00,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:29:00,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:29:00,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:29:00,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:29:00,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:29:00,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:29:00,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:29:00,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:29:00,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:29:00,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:29:00,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:29:00,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:29:00,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:29:00,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:29:00,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:29:00,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:29:00,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:29:00,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:29:00,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:29:00,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:29:00,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:29:00,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:29:00,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:29:00,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:29:00,247 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 05:29:00,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:29:00,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:29:00,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:29:00,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:29:00,306 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:29:00,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:29:00,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:29:00,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:29:00,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:29:00,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:29:00,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:29:00,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:29:00,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:29:00,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:29:00,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:29:00,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:29:00,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:29:00,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:29:00,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:29:00,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:29:00,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:29:00,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:29:00,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:29:00,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:29:00,314 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 05:29:00,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:29:00,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:29:00,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:29:00,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:29:00,610 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:29:00,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-14 05:29:00,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec26c6edc/ef4555414ca84f37898009163886a464/FLAGa9c93a1a0 [2020-10-14 05:29:01,076 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:29:01,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2020-10-14 05:29:01,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec26c6edc/ef4555414ca84f37898009163886a464/FLAGa9c93a1a0 [2020-10-14 05:29:01,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec26c6edc/ef4555414ca84f37898009163886a464 [2020-10-14 05:29:01,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:29:01,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:29:01,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:01,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:29:01,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:29:01,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366b14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01, skipping insertion in model container [2020-10-14 05:29:01,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:29:01,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:29:01,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:01,688 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:29:01,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:01,724 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:29:01,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01 WrapperNode [2020-10-14 05:29:01,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:01,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:29:01,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:29:01,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:29:01,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (1/1) ... [2020-10-14 05:29:01,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:29:01,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:29:01,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:29:01,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:29:01,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (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 05:29:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:29:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:29:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:29:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:29:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:29:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:29:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:29:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:29:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:29:02,125 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:29:02,125 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:29:02,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:02 BoogieIcfgContainer [2020-10-14 05:29:02,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:29:02,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:29:02,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:29:02,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:29:02,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:29:01" (1/3) ... [2020-10-14 05:29:02,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fad235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:02, skipping insertion in model container [2020-10-14 05:29:02,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:01" (2/3) ... [2020-10-14 05:29:02,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fad235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:02, skipping insertion in model container [2020-10-14 05:29:02,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:02" (3/3) ... [2020-10-14 05:29:02,137 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2020-10-14 05:29:02,147 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:29:02,154 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:29:02,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:29:02,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:29:02,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:29:02,188 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:29:02,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:29:02,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:29:02,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:29:02,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:29:02,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:29:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 05:29:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:02,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:02,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:02,214 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 670812305, now seen corresponding path program 1 times [2020-10-14 05:29:02,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:02,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339533933] [2020-10-14 05:29:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:02,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:02,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:02,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-14 05:29:02,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:02,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:02,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:29:02,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:02,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:02,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:29:02,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:02,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:02,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:02,530 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 05:29:02,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339533933] [2020-10-14 05:29:02,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:02,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:29:02,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735198217] [2020-10-14 05:29:02,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:29:02,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:29:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:29:02,560 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-10-14 05:29:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:02,591 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-14 05:29:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:29:02,594 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-14 05:29:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:02,611 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:29:02,612 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:29:02,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:29:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:29:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:29:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:29:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-14 05:29:02,676 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-10-14 05:29:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:02,678 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-14 05:29:02,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:29:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-14 05:29:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:02,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:02,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:02,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:29:02,682 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 380826711, now seen corresponding path program 1 times [2020-10-14 05:29:02,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:02,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458114088] [2020-10-14 05:29:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:02,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:02,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:02,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 05:29:02,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:02,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:29:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:02,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:02,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:02,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:02,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:02,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:02,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:02,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:02,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:02,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:02,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:02,916 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 05:29:02,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458114088] [2020-10-14 05:29:02,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:02,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:02,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485644236] [2020-10-14 05:29:02,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:02,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:02,921 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-10-14 05:29:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:02,944 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-10-14 05:29:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:02,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-14 05:29:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:02,946 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:02,946 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:29:02,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:29:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:29:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:29:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-14 05:29:02,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-10-14 05:29:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:02,955 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-14 05:29:02,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-14 05:29:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:29:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:02,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:02,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:29:02,957 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1044659607, now seen corresponding path program 1 times [2020-10-14 05:29:02,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:02,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581335358] [2020-10-14 05:29:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:02,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:02,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:29:03,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-14 05:29:03,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:03,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:29:03,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:03,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:03,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:29:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:03,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581335358] [2020-10-14 05:29:03,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:03,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:03,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041442479] [2020-10-14 05:29:03,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:03,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:03,165 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-10-14 05:29:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:03,200 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-14 05:29:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:03,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:29:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:03,202 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:29:03,202 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:29:03,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:29:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:29:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:29:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-14 05:29:03,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-10-14 05:29:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:03,210 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-14 05:29:03,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-14 05:29:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:29:03,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:03,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:03,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:29:03,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash 284970022, now seen corresponding path program 1 times [2020-10-14 05:29:03,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:03,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152796762] [2020-10-14 05:29:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:29:03,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:03,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 05:29:03,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:03,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:03,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:03,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:03,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:03,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:03,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:03,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152796762] [2020-10-14 05:29:03,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:03,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:03,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637451239] [2020-10-14 05:29:03,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:03,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:03,331 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2020-10-14 05:29:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:03,370 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-14 05:29:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:03,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:29:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:03,372 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:29:03,372 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:29:03,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:29:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-14 05:29:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:29:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 05:29:03,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-14 05:29:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:03,379 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 05:29:03,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 05:29:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:29:03,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:03,380 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:03,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:29:03,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1644409953, now seen corresponding path program 1 times [2020-10-14 05:29:03,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:03,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589483826] [2020-10-14 05:29:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:29:03,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:03,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-14 05:29:03,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:03,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:03,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:03,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:03,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:03,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:03,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:29:03,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589483826] [2020-10-14 05:29:03,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:03,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:03,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618061053] [2020-10-14 05:29:03,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:03,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:03,651 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-10-14 05:29:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:03,700 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 05:29:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:03,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:29:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:03,703 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:29:03,703 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:29:03,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:29:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-14 05:29:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:29:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-14 05:29:03,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2020-10-14 05:29:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:03,721 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-14 05:29:03,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-14 05:29:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:29:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:03,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:03,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:29:03,724 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash -528284769, now seen corresponding path program 2 times [2020-10-14 05:29:03,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:03,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725218915] [2020-10-14 05:29:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:29:03,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-14 05:29:03,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:03,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:29:03,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:03,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:03,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:03,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:03,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:03,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:03,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:03,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:03,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725218915] [2020-10-14 05:29:03,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:03,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:03,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423994643] [2020-10-14 05:29:03,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:03,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:03,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:03,993 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-14 05:29:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:04,019 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-14 05:29:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:04,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:29:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:04,021 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:29:04,021 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:29:04,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:29:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:29:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:29:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 05:29:04,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-14 05:29:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:04,028 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 05:29:04,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 05:29:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:29:04,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:04,029 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:04,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:29:04,030 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash 599001090, now seen corresponding path program 3 times [2020-10-14 05:29:04,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:04,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495080085] [2020-10-14 05:29:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:04,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:29:04,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-14 05:29:04,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:04,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:29:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:04,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:04,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:04,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:04,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:04,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:04,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:04,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:04,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495080085] [2020-10-14 05:29:04,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:04,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:04,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235869143] [2020-10-14 05:29:04,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:04,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:04,374 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-14 05:29:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:04,407 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:29:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:04,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 05:29:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:04,408 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:29:04,408 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:29:04,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:29:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:29:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:29:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:29:04,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-14 05:29:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:04,415 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:29:04,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:29:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:29:04,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:04,416 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:04,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:29:04,417 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1588952997, now seen corresponding path program 4 times [2020-10-14 05:29:04,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:04,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210850585] [2020-10-14 05:29:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:04,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:04,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:29:04,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 05:29:04,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:04,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:29:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:29:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:04,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:04,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:04,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:04,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:04,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:04,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:04,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:04,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:29:04,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210850585] [2020-10-14 05:29:04,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:04,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:04,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109591007] [2020-10-14 05:29:04,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:04,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:04,850 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-14 05:29:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:04,906 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:29:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:04,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 05:29:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:04,910 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:29:04,911 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:29:04,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:29:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 05:29:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:29:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-14 05:29:04,925 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-14 05:29:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:04,926 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-14 05:29:04,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-14 05:29:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:29:04,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:04,929 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:04,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:29:04,930 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash 151060490, now seen corresponding path program 5 times [2020-10-14 05:29:04,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:04,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927802067] [2020-10-14 05:29:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:05,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:05,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:29:05,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:05,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 05:29:05,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:05,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:05,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:05,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:05,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:29:05,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:05,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:05,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:05,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:05,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:05,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:05,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:05,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:05,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:05,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:05,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:29:05,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927802067] [2020-10-14 05:29:05,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:05,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:05,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878356065] [2020-10-14 05:29:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:05,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:05,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:05,906 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-14 05:29:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:05,952 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-14 05:29:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:05,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 05:29:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:05,955 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:29:05,956 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:29:05,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:29:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 05:29:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:29:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:29:05,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-10-14 05:29:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:05,968 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:29:05,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:29:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:29:05,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:05,969 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:05,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:29:05,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1902636589, now seen corresponding path program 6 times [2020-10-14 05:29:05,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:05,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876661772] [2020-10-14 05:29:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:05,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:06,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:29:06,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:06,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 05:29:06,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:06,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:06,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:06,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:29:06,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:29:06,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:06,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:06,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:06,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:06,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:06,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:06,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:06,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:06,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:06,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:06,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:06,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876661772] [2020-10-14 05:29:06,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:06,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:06,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13751096] [2020-10-14 05:29:06,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:06,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:06,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:06,660 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-10-14 05:29:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:06,708 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-14 05:29:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:06,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-14 05:29:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:06,710 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:29:06,710 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:29:06,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:29:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 05:29:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:29:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 05:29:06,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 25 [2020-10-14 05:29:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:06,723 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 05:29:06,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 05:29:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:29:06,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:06,725 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:06,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:29:06,726 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 953281682, now seen corresponding path program 7 times [2020-10-14 05:29:06,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:06,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226958964] [2020-10-14 05:29:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:06,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:07,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:29:07,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-14 05:29:07,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:07,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:07,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:29:07,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:07,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:07,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:07,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:07,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:07,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:07,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:07,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:29:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:29:07,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226958964] [2020-10-14 05:29:07,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:07,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:07,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138489635] [2020-10-14 05:29:07,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:07,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:07,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:07,775 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-10-14 05:29:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:07,877 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-14 05:29:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:07,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 05:29:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:07,884 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:29:07,884 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:29:07,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:29:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 05:29:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:29:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-14 05:29:07,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-10-14 05:29:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:07,901 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-14 05:29:07,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-14 05:29:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:29:07,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:07,903 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:07,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:29:07,904 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash -478424690, now seen corresponding path program 8 times [2020-10-14 05:29:07,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:07,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108763994] [2020-10-14 05:29:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:07,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:08,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:08,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:29:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-14 05:29:08,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:08,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:29:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:08,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:08,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:08,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:08,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:08,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:08,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:08,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108763994] [2020-10-14 05:29:08,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:08,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:08,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190590384] [2020-10-14 05:29:08,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:08,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:08,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:08,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:08,553 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2020-10-14 05:29:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:08,609 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-14 05:29:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:08,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 05:29:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:08,614 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:29:08,615 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:29:08,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:29:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 05:29:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:29:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:29:08,633 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2020-10-14 05:29:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:08,633 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:29:08,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:29:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:29:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:08,640 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:08,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:29:08,641 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 670253387, now seen corresponding path program 9 times [2020-10-14 05:29:08,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:08,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173350747] [2020-10-14 05:29:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:08,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:08,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:09,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:09,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:29:09,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-14 05:29:09,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:09,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:29:09,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:09,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:09,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:09,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:09,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:09,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:09,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:09,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:09,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173350747] [2020-10-14 05:29:09,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:09,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:09,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377767474] [2020-10-14 05:29:09,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:09,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:09,489 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 8 states. [2020-10-14 05:29:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:09,535 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-10-14 05:29:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:09,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 05:29:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:09,537 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:29:09,537 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:29:09,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:29:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:29:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:29:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:29:09,552 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2020-10-14 05:29:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:09,552 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:29:09,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:29:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:29:09,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:09,556 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:09,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:29:09,556 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash 743290312, now seen corresponding path program 10 times [2020-10-14 05:29:09,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:09,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025125008] [2020-10-14 05:29:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:10,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:29:10,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:10,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-14 05:29:10,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:10,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:10,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:29:10,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:10,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:10,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:10,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:10,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:10,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:10,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:10,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:10,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:29:10,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025125008] [2020-10-14 05:29:10,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:10,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:10,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067138190] [2020-10-14 05:29:10,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:10,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:10,185 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-10-14 05:29:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:10,229 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-14 05:29:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:10,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-14 05:29:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:10,231 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:29:10,231 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:29:10,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:29:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 05:29:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:29:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-14 05:29:10,243 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 32 [2020-10-14 05:29:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:10,244 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-14 05:29:10,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-14 05:29:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:29:10,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:10,248 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:10,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:29:10,248 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1191230147, now seen corresponding path program 11 times [2020-10-14 05:29:10,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:10,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159079087] [2020-10-14 05:29:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:10,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:10,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:29:10,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:10,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-14 05:29:10,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:10,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:10,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:29:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:10,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:10,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:10,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:10,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:10,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:10,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:10,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:10,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:10,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:10,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159079087] [2020-10-14 05:29:10,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:10,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:10,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895541244] [2020-10-14 05:29:10,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:10,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:10,979 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 9 states. [2020-10-14 05:29:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:11,029 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-14 05:29:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:11,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-14 05:29:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:11,032 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:29:11,033 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 05:29:11,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 05:29:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 05:29:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:29:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-14 05:29:11,047 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 34 [2020-10-14 05:29:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:11,047 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-14 05:29:11,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-14 05:29:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:29:11,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:11,051 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:11,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:29:11,052 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -136140608, now seen corresponding path program 12 times [2020-10-14 05:29:11,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:11,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816603006] [2020-10-14 05:29:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:11,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:11,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:11,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:11,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:29:11,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:11,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-14 05:29:11,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:11,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:29:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:29:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:11,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:11,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:11,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:11,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:11,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:11,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:11,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:11,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:11,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:29:11,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816603006] [2020-10-14 05:29:11,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:11,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:11,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099098679] [2020-10-14 05:29:11,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:11,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:11,899 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 7 states. [2020-10-14 05:29:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:11,951 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-14 05:29:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:11,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-14 05:29:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:11,953 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:29:11,953 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:29:11,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:29:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 05:29:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:29:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 05:29:11,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-10-14 05:29:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:11,964 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 05:29:11,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 05:29:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:29:11,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:11,966 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:11,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:29:11,966 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2128293957, now seen corresponding path program 13 times [2020-10-14 05:29:11,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19278006] [2020-10-14 05:29:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:11,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:12,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:12,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:29:12,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:29:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:12,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:12,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:12,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:12,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:12,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:12,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:29:12,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19278006] [2020-10-14 05:29:12,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:12,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:12,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329713440] [2020-10-14 05:29:12,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:12,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:12,890 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-10-14 05:29:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:12,943 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-14 05:29:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:12,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 05:29:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:12,945 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:29:12,945 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:29:12,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:29:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 05:29:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:29:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-14 05:29:12,952 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 38 [2020-10-14 05:29:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:12,952 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-14 05:29:12,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-14 05:29:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:29:12,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:12,953 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:12,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:29:12,953 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash -214599880, now seen corresponding path program 14 times [2020-10-14 05:29:12,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:12,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600634454] [2020-10-14 05:29:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:12,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:13,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:13,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:13,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:29:13,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:13,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-14 05:29:13,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:13,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:29:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:29:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:14,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:14,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:14,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:14,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:14,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:14,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:14,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:14,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:14,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-14 05:29:14,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600634454] [2020-10-14 05:29:14,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:14,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:14,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354532778] [2020-10-14 05:29:14,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:14,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:14,027 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2020-10-14 05:29:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:14,079 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-14 05:29:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:14,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-14 05:29:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:14,081 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:29:14,081 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:29:14,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:29:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 05:29:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:29:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 05:29:14,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 40 [2020-10-14 05:29:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:14,089 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 05:29:14,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 05:29:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:29:14,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:14,090 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:14,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:29:14,091 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash -218243021, now seen corresponding path program 15 times [2020-10-14 05:29:14,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:14,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969883712] [2020-10-14 05:29:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:15,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:15,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:29:15,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:29:15,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:15,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:15,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:15,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:15,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:15,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:15,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:15,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:15,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:15,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:15,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:15,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 05:29:15,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969883712] [2020-10-14 05:29:15,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:15,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:15,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583937296] [2020-10-14 05:29:15,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:15,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:15,292 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 9 states. [2020-10-14 05:29:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:15,333 INFO L93 Difference]: Finished difference Result 102 states and 133 transitions. [2020-10-14 05:29:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:15,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:29:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:15,336 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:29:15,336 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:29:15,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:29:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2020-10-14 05:29:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:29:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 05:29:15,349 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 42 [2020-10-14 05:29:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:15,351 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 05:29:15,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 05:29:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:29:15,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:15,352 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:15,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:29:15,353 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1859015181, now seen corresponding path program 16 times [2020-10-14 05:29:15,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:15,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767796073] [2020-10-14 05:29:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:15,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:15,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:18,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:18,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:29:18,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:29:18,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2702 [2020-10-14 05:29:18,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:18,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:18,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:29:18,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:18,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:18,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:18,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:18,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-14 05:29:18,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767796073] [2020-10-14 05:29:18,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:18,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:18,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924471795] [2020-10-14 05:29:18,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:18,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:18,244 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 9 states. [2020-10-14 05:29:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:18,313 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-14 05:29:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:18,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-14 05:29:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:18,314 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:29:18,314 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:29:18,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:29:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 05:29:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:29:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-14 05:29:18,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 43 [2020-10-14 05:29:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:18,327 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-14 05:29:18,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-14 05:29:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:29:18,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:18,327 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:18,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:29:18,328 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1829510003, now seen corresponding path program 17 times [2020-10-14 05:29:18,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:18,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728879899] [2020-10-14 05:29:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:18,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:18,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:19,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:19,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:29:19,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:29:19,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:19,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:19,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:19,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:19,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 05:29:19,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728879899] [2020-10-14 05:29:19,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:19,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:19,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889910864] [2020-10-14 05:29:19,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:19,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:19,739 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 11 states. [2020-10-14 05:29:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:19,801 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-14 05:29:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:19,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-14 05:29:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:19,803 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:29:19,803 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:29:19,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:29:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 05:29:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:29:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:29:19,818 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 44 [2020-10-14 05:29:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:19,819 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:29:19,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:29:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:29:19,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:19,821 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:19,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:29:19,822 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 405696816, now seen corresponding path program 18 times [2020-10-14 05:29:19,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:19,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410019245] [2020-10-14 05:29:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:19,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:29:21,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-14 05:29:21,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:29:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:21,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:21,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:21,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:21,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:21,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 05:29:21,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410019245] [2020-10-14 05:29:21,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:21,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:29:21,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087720152] [2020-10-14 05:29:21,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:29:21,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:21,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:29:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:21,192 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 12 states. [2020-10-14 05:29:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:21,247 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-10-14 05:29:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:21,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-14 05:29:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:21,249 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:29:21,249 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:29:21,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:29:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:29:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:29:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:29:21,255 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 46 [2020-10-14 05:29:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:21,256 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:29:21,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:29:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:29:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:21,256 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:21,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:29:21,257 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2079175763, now seen corresponding path program 19 times [2020-10-14 05:29:21,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:21,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587678743] [2020-10-14 05:29:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:29:22,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:29:22,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:29:22,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-14 05:29:22,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587678743] [2020-10-14 05:29:22,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:22,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:22,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82712524] [2020-10-14 05:29:22,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:22,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:22,658 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 9 states. [2020-10-14 05:29:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,702 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-14 05:29:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:22,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-14 05:29:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,703 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:29:22,703 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:29:22,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:29:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 05:29:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:29:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-14 05:29:22,709 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 48 [2020-10-14 05:29:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,710 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-14 05:29:22,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-14 05:29:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:29:22,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,710 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:29:22,711 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2121046184, now seen corresponding path program 20 times [2020-10-14 05:29:22,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941966037] [2020-10-14 05:29:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:29:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:23,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:23,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 05:29:23,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941966037] [2020-10-14 05:29:23,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:23,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:23,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143793942] [2020-10-14 05:29:23,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:23,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:23,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:23,859 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 13 states. [2020-10-14 05:29:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:23,914 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-14 05:29:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:29:23,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-14 05:29:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:23,915 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:29:23,915 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:29:23,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:29:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:29:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:29:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-14 05:29:23,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 50 [2020-10-14 05:29:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:23,921 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-14 05:29:23,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:29:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-14 05:29:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:29:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:23,922 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:23,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:29:23,922 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1203039397, now seen corresponding path program 21 times [2020-10-14 05:29:23,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:23,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710119556] [2020-10-14 05:29:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:29:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:29:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:24,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 165 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-14 05:29:24,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710119556] [2020-10-14 05:29:24,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:24,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:24,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918272734] [2020-10-14 05:29:24,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:24,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:24,956 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 10 states. [2020-10-14 05:29:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:25,034 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-10-14 05:29:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:25,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-14 05:29:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:25,035 INFO L225 Difference]: With dead ends: 83 [2020-10-14 05:29:25,035 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:29:25,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:29:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 05:29:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:29:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-14 05:29:25,048 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 52 [2020-10-14 05:29:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:25,049 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-14 05:29:25,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-14 05:29:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:29:25,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:25,049 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:25,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:29:25,050 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -471147616, now seen corresponding path program 22 times [2020-10-14 05:29:25,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:25,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702547691] [2020-10-14 05:29:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:29:26,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:26,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:29:26,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:26,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:26,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:26,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:26,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:26,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:26,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:26,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:26,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:26,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:26,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:29:26,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702547691] [2020-10-14 05:29:26,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:26,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:29:26,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828856935] [2020-10-14 05:29:26,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:29:26,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:29:26,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:26,577 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 14 states. [2020-10-14 05:29:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:26,642 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2020-10-14 05:29:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:29:26,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 05:29:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:26,646 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:29:26,646 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:29:26,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:29:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:29:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:29:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-14 05:29:26,653 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 54 [2020-10-14 05:29:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:26,653 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-14 05:29:26,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:29:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-14 05:29:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:29:26,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:26,655 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:26,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:29:26,656 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1757341981, now seen corresponding path program 23 times [2020-10-14 05:29:26,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:26,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022570335] [2020-10-14 05:29:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:26,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:27,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:27,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:29:27,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:27,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-14 05:29:27,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:27,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:29:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:27,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:29:27,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:28,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:28,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:28,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:28,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:28,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:28,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:28,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:28,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:29:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022570335] [2020-10-14 05:29:28,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:28,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:29:28,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360053403] [2020-10-14 05:29:28,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:29:28,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:29:28,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:28,140 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 15 states. [2020-10-14 05:29:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:28,208 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-10-14 05:29:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:29:28,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-14 05:29:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:28,210 INFO L225 Difference]: With dead ends: 103 [2020-10-14 05:29:28,210 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:29:28,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:29:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:29:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:29:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-14 05:29:28,218 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 56 [2020-10-14 05:29:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:28,219 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-14 05:29:28,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:29:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-14 05:29:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:29:28,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:28,220 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:28,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:29:28,220 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:28,221 INFO L82 PathProgramCache]: Analyzing trace with hash 147163994, now seen corresponding path program 24 times [2020-10-14 05:29:28,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:28,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964322494] [2020-10-14 05:29:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:28,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:30,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:29:30,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:29:30,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:30,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:30,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:30,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 221 proven. 64 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-14 05:29:30,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964322494] [2020-10-14 05:29:30,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:30,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:30,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432950940] [2020-10-14 05:29:30,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:30,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:30,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:30,367 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 11 states. [2020-10-14 05:29:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:30,443 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-10-14 05:29:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:30,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-14 05:29:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:30,449 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:29:30,450 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:29:30,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:29:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 05:29:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:29:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-14 05:29:30,460 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 58 [2020-10-14 05:29:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:30,461 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-14 05:29:30,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-14 05:29:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:29:30,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:30,461 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:30,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:29:30,462 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:30,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1555128043, now seen corresponding path program 25 times [2020-10-14 05:29:30,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:30,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371017338] [2020-10-14 05:29:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:32,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:32,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:29:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:32,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:32,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:32,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:32,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:32,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-14 05:29:32,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371017338] [2020-10-14 05:29:32,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:32,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:29:32,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498190274] [2020-10-14 05:29:32,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:29:32,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:29:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:29:32,605 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 16 states. [2020-10-14 05:29:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:32,692 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-10-14 05:29:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:29:32,694 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-14 05:29:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:32,695 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:29:32,695 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:29:32,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:29:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:29:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 05:29:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:29:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-14 05:29:32,702 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 60 [2020-10-14 05:29:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:32,703 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-14 05:29:32,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:29:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-14 05:29:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:29:32,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:32,703 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:32,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:29:32,704 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1097868078, now seen corresponding path program 26 times [2020-10-14 05:29:32,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:32,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173425243] [2020-10-14 05:29:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:33,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:34,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:29:34,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1405 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:29:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:34,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:34,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:34,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:34,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 266 proven. 81 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:29:34,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173425243] [2020-10-14 05:29:34,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:34,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:29:34,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901048536] [2020-10-14 05:29:34,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:29:34,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:29:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:34,207 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-10-14 05:29:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:34,288 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-14 05:29:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:34,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 05:29:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:34,294 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:29:34,294 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:29:34,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:29:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 05:29:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:29:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-14 05:29:34,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 62 [2020-10-14 05:29:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:34,304 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-14 05:29:34,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-14 05:29:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:29:34,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:34,305 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:34,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:29:34,306 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash 264926349, now seen corresponding path program 27 times [2020-10-14 05:29:34,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:34,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839758594] [2020-10-14 05:29:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:34,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:35,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:35,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:29:35,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:29:35,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:36,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:36,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:36,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:36,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:36,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 05:29:36,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839758594] [2020-10-14 05:29:36,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:36,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:29:36,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785920938] [2020-10-14 05:29:36,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:29:36,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:29:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:36,038 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 17 states. [2020-10-14 05:29:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:36,131 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-10-14 05:29:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:29:36,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-10-14 05:29:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:36,133 INFO L225 Difference]: With dead ends: 115 [2020-10-14 05:29:36,133 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:29:36,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:29:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-14 05:29:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:29:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-14 05:29:36,139 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 64 [2020-10-14 05:29:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:36,140 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-14 05:29:36,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:29:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-14 05:29:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:29:36,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:36,140 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:36,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:29:36,141 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -329414198, now seen corresponding path program 28 times [2020-10-14 05:29:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:36,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073564025] [2020-10-14 05:29:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:36,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:38,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:29:38,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2228 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:29:38,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:38,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:38,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:38,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:38,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:38,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:38,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:38,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 05:29:38,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073564025] [2020-10-14 05:29:38,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:38,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:38,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266757566] [2020-10-14 05:29:38,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:38,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:38,478 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 13 states. [2020-10-14 05:29:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:38,556 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-14 05:29:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:29:38,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-14 05:29:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:38,557 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:29:38,557 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:29:38,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:29:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 05:29:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:29:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-10-14 05:29:38,563 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 66 [2020-10-14 05:29:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:38,564 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-10-14 05:29:38,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:29:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-10-14 05:29:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:29:38,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:38,565 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:38,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:29:38,565 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash 14730117, now seen corresponding path program 29 times [2020-10-14 05:29:38,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:38,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114507688] [2020-10-14 05:29:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:40,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:29:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:29:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:40,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:40,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:40,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 436 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-14 05:29:40,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114507688] [2020-10-14 05:29:40,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:40,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:29:40,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222387870] [2020-10-14 05:29:40,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:29:40,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:29:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:40,955 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 14 states. [2020-10-14 05:29:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:41,013 INFO L93 Difference]: Finished difference Result 224 states and 306 transitions. [2020-10-14 05:29:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:29:41,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-14 05:29:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:41,015 INFO L225 Difference]: With dead ends: 224 [2020-10-14 05:29:41,016 INFO L226 Difference]: Without dead ends: 211 [2020-10-14 05:29:41,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-14 05:29:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 79. [2020-10-14 05:29:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:29:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-10-14 05:29:41,024 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 68 [2020-10-14 05:29:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:41,025 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-10-14 05:29:41,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:29:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-10-14 05:29:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:29:41,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:41,026 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:41,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:29:41,026 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1916571067, now seen corresponding path program 30 times [2020-10-14 05:29:41,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:41,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908884644] [2020-10-14 05:29:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:41,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2701 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:29:43,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:29:43,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-14 05:29:43,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908884644] [2020-10-14 05:29:43,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:43,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:29:43,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627288052] [2020-10-14 05:29:43,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:29:43,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:29:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:29:43,910 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 18 states. [2020-10-14 05:29:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:44,008 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-10-14 05:29:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:29:44,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-14 05:29:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:44,010 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:29:44,010 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:29:44,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:29:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:29:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-14 05:29:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:29:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-14 05:29:44,018 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 70 [2020-10-14 05:29:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:44,018 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-14 05:29:44,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:29:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-14 05:29:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:29:44,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:44,019 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:44,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:29:44,020 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -305207870, now seen corresponding path program 31 times [2020-10-14 05:29:44,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:44,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645938631] [2020-10-14 05:29:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:29:46,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2680 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:29:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:46,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:46,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:46,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:46,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:29:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-14 05:29:46,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645938631] [2020-10-14 05:29:46,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:46,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:29:46,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250535674] [2020-10-14 05:29:46,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:29:46,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:29:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:29:46,910 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 19 states. [2020-10-14 05:29:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:47,006 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-10-14 05:29:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:29:47,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2020-10-14 05:29:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:47,012 INFO L225 Difference]: With dead ends: 127 [2020-10-14 05:29:47,013 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:29:47,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:29:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:29:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 05:29:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:29:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-14 05:29:47,024 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 72 [2020-10-14 05:29:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:47,024 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-14 05:29:47,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:29:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-14 05:29:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:29:47,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:47,025 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:47,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:29:47,026 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2026597887, now seen corresponding path program 32 times [2020-10-14 05:29:47,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:47,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264780628] [2020-10-14 05:29:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:47,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3140 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:29:50,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:50,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:50,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:50,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 391 proven. 121 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-14 05:29:50,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264780628] [2020-10-14 05:29:50,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:50,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:29:50,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849547953] [2020-10-14 05:29:50,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:29:50,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:29:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:50,296 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 14 states. [2020-10-14 05:29:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:50,391 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-10-14 05:29:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:29:50,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-14 05:29:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:50,394 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:29:50,394 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:29:50,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:29:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 05:29:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:29:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-10-14 05:29:50,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 74 [2020-10-14 05:29:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:50,402 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-10-14 05:29:50,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:29:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-10-14 05:29:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:29:50,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:50,403 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:50,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:29:50,403 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash 524635066, now seen corresponding path program 33 times [2020-10-14 05:29:50,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:50,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330849392] [2020-10-14 05:29:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2943 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:29:53,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:29:53,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:53,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:53,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-10-14 05:29:53,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330849392] [2020-10-14 05:29:53,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:53,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:29:53,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453067369] [2020-10-14 05:29:53,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:29:53,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:53,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:29:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:29:53,572 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 20 states. [2020-10-14 05:29:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:53,681 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2020-10-14 05:29:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:29:53,682 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2020-10-14 05:29:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:53,683 INFO L225 Difference]: With dead ends: 133 [2020-10-14 05:29:53,683 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:29:53,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:29:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:29:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-14 05:29:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:29:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-14 05:29:53,691 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 76 [2020-10-14 05:29:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:53,692 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-14 05:29:53,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:29:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-14 05:29:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:29:53,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:53,693 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:53,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:29:53,693 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1276734839, now seen corresponding path program 34 times [2020-10-14 05:29:53,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:53,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246851784] [2020-10-14 05:29:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:57,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 05:29:57,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3774 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:29:57,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:57,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:57,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:57,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:57,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:57,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:57,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:57,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:57,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:57,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:57,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 450 proven. 144 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:29:57,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246851784] [2020-10-14 05:29:57,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:57,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:29:57,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780207002] [2020-10-14 05:29:57,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:29:57,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:29:57,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:57,603 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 15 states. [2020-10-14 05:29:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:57,678 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2020-10-14 05:29:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:29:57,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-14 05:29:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:57,680 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:29:57,680 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 05:29:57,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 05:29:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 05:29:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:29:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-14 05:29:57,688 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 78 [2020-10-14 05:29:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:57,688 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-14 05:29:57,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:29:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-14 05:29:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:29:57,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:57,690 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:57,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:29:57,690 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1460751666, now seen corresponding path program 35 times [2020-10-14 05:29:57,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:57,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547434910] [2020-10-14 05:29:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3946 [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:30:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:30:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:01,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:01,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:01,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:01,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 475 proven. 342 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:01,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547434910] [2020-10-14 05:30:01,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:01,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:30:01,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710403399] [2020-10-14 05:30:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:30:01,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:30:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:01,882 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 21 states. [2020-10-14 05:30:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:01,981 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2020-10-14 05:30:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:30:01,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 80 [2020-10-14 05:30:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:01,982 INFO L225 Difference]: With dead ends: 139 [2020-10-14 05:30:01,982 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:30:01,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:30:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-14 05:30:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:30:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-14 05:30:02,002 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 80 [2020-10-14 05:30:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:02,002 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-14 05:30:02,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:30:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-14 05:30:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:30:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:02,004 INFO L422 BasicCegarLoop]: trace histogram [32, 19, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:02,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:30:02,004 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -715896721, now seen corresponding path program 36 times [2020-10-14 05:30:02,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:02,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146811195] [2020-10-14 05:30:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:02,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3740 [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:05,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:30:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:05,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:30:05,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:06,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:06,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:06,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:06,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:06,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:06,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:06,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 500 proven. 380 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:06,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146811195] [2020-10-14 05:30:06,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:06,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:30:06,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29354536] [2020-10-14 05:30:06,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:30:06,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:30:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:06,013 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 22 states. [2020-10-14 05:30:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:06,093 INFO L93 Difference]: Finished difference Result 141 states and 174 transitions. [2020-10-14 05:30:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:30:06,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-10-14 05:30:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:06,096 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:30:06,096 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:30:06,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:30:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-14 05:30:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:30:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-10-14 05:30:06,115 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 82 [2020-10-14 05:30:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:06,115 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-10-14 05:30:06,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:30:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-10-14 05:30:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:30:06,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:06,121 INFO L422 BasicCegarLoop]: trace histogram [33, 20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:06,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:30:06,121 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash -825923476, now seen corresponding path program 37 times [2020-10-14 05:30:06,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:06,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739861371] [2020-10-14 05:30:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4063 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 05:30:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:30:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:10,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:10,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:10,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:10,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:10,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 540 proven. 169 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-14 05:30:10,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739861371] [2020-10-14 05:30:10,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:10,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:10,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313245106] [2020-10-14 05:30:10,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:10,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:10,343 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 16 states. [2020-10-14 05:30:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:10,437 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-10-14 05:30:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:10,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-10-14 05:30:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:10,442 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:30:10,442 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:30:10,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:30:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 05:30:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:30:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-14 05:30:10,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 84 [2020-10-14 05:30:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:10,451 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-14 05:30:10,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-14 05:30:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:30:10,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:10,452 INFO L422 BasicCegarLoop]: trace histogram [34, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:10,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:30:10,452 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -559259929, now seen corresponding path program 38 times [2020-10-14 05:30:10,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:10,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909975326] [2020-10-14 05:30:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:10,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4720 [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:15,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:30:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:30:15,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:15,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:15,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:15,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 567 proven. 420 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:30:15,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909975326] [2020-10-14 05:30:15,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:15,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:30:15,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812454835] [2020-10-14 05:30:15,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:30:15,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:30:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:15,461 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 23 states. [2020-10-14 05:30:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:15,565 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2020-10-14 05:30:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:30:15,567 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-14 05:30:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:15,569 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:30:15,569 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:30:15,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:30:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-14 05:30:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:30:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-14 05:30:15,576 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 86 [2020-10-14 05:30:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:15,576 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-14 05:30:15,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:30:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-14 05:30:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:30:15,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:15,578 INFO L422 BasicCegarLoop]: trace histogram [35, 21, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:15,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:30:15,578 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2053191780, now seen corresponding path program 39 times [2020-10-14 05:30:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768262507] [2020-10-14 05:30:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:15,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:16,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:20,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:30:20,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4976 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:30:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:20,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:20,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:20,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:20,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:20,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:20,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 609 proven. 196 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-14 05:30:20,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768262507] [2020-10-14 05:30:20,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:20,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:30:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776147716] [2020-10-14 05:30:20,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:30:20,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:30:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:20,729 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 17 states. [2020-10-14 05:30:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:20,823 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2020-10-14 05:30:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:30:20,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-14 05:30:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:20,824 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:30:20,825 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 05:30:20,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 05:30:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 05:30:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:30:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-10-14 05:30:20,833 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 88 [2020-10-14 05:30:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:20,833 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-10-14 05:30:20,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:30:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-10-14 05:30:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:30:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:20,835 INFO L422 BasicCegarLoop]: trace histogram [36, 21, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:20,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:30:20,835 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 311562463, now seen corresponding path program 40 times [2020-10-14 05:30:20,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:20,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666581843] [2020-10-14 05:30:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:20,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:22,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:25,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:25,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:30:25,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:26,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:26,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:26,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:26,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:26,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:26,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:26,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:26,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:26,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 638 proven. 462 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-14 05:30:26,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666581843] [2020-10-14 05:30:26,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:26,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:30:26,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603358489] [2020-10-14 05:30:26,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:30:26,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:26,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:30:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:26,141 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 24 states. [2020-10-14 05:30:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:26,249 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2020-10-14 05:30:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:30:26,250 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2020-10-14 05:30:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:26,251 INFO L225 Difference]: With dead ends: 153 [2020-10-14 05:30:26,251 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:30:26,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:30:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-14 05:30:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:30:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2020-10-14 05:30:26,259 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 90 [2020-10-14 05:30:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:26,260 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2020-10-14 05:30:26,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:30:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2020-10-14 05:30:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:30:26,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:26,261 INFO L422 BasicCegarLoop]: trace histogram [37, 22, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:26,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:30:26,261 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash -602545188, now seen corresponding path program 41 times [2020-10-14 05:30:26,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:26,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485269896] [2020-10-14 05:30:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:26,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:26,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:30:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 05:30:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:30:31,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:31,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:31,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:31,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:31,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:31,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:31,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:31,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 682 proven. 225 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-10-14 05:30:31,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485269896] [2020-10-14 05:30:31,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:31,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:30:31,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519844897] [2020-10-14 05:30:31,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:30:31,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:31,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:30:31,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:31,450 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 18 states. [2020-10-14 05:30:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:31,551 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-10-14 05:30:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:30:31,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-10-14 05:30:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:31,554 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:30:31,554 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:30:31,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:30:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 05:30:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:30:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2020-10-14 05:30:31,563 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 92 [2020-10-14 05:30:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:31,564 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2020-10-14 05:30:31,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:30:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2020-10-14 05:30:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:30:31,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:31,565 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:31,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:30:31,565 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash -641089961, now seen corresponding path program 42 times [2020-10-14 05:30:31,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:31,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96408025] [2020-10-14 05:30:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:31,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:34,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:36,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 05:30:36,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:36,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:36,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:36,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:36,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 938 proven. 28 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-14 05:30:36,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96408025] [2020-10-14 05:30:36,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:36,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:36,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853648106] [2020-10-14 05:30:36,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:36,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:36,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:36,780 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 19 states. [2020-10-14 05:30:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:36,870 INFO L93 Difference]: Finished difference Result 391 states and 549 transitions. [2020-10-14 05:30:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:36,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-14 05:30:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:36,874 INFO L225 Difference]: With dead ends: 391 [2020-10-14 05:30:36,874 INFO L226 Difference]: Without dead ends: 378 [2020-10-14 05:30:36,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-14 05:30:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 106. [2020-10-14 05:30:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 05:30:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2020-10-14 05:30:36,885 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 94 [2020-10-14 05:30:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:36,885 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2020-10-14 05:30:36,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2020-10-14 05:30:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:30:36,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:36,886 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:36,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:30:36,886 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash -799473513, now seen corresponding path program 43 times [2020-10-14 05:30:36,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:36,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358388666] [2020-10-14 05:30:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:36,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:39,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:41,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:30:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:42,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:42,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:42,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:42,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:42,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 713 proven. 506 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:30:42,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358388666] [2020-10-14 05:30:42,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:42,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:30:42,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186813858] [2020-10-14 05:30:42,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:30:42,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:30:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:30:42,238 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 25 states. [2020-10-14 05:30:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:42,345 INFO L93 Difference]: Finished difference Result 165 states and 204 transitions. [2020-10-14 05:30:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:30:42,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-10-14 05:30:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:42,347 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:30:42,347 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 05:30:42,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:30:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 05:30:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-14 05:30:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 05:30:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2020-10-14 05:30:42,357 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 96 [2020-10-14 05:30:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:42,357 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2020-10-14 05:30:42,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:30:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2020-10-14 05:30:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:30:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:42,358 INFO L422 BasicCegarLoop]: trace histogram [39, 23, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:42,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:30:42,359 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1337975252, now seen corresponding path program 44 times [2020-10-14 05:30:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:42,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184022943] [2020-10-14 05:30:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:42,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:47,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:47,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:30:47,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:30:47,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:47,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:47,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:47,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:47,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:47,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:47,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:47,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:47,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 744 proven. 552 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:30:47,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184022943] [2020-10-14 05:30:47,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:47,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:30:47,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910094001] [2020-10-14 05:30:47,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:30:47,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:30:47,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:30:47,765 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand 26 states. [2020-10-14 05:30:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:47,899 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2020-10-14 05:30:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:30:47,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-10-14 05:30:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:47,901 INFO L225 Difference]: With dead ends: 167 [2020-10-14 05:30:47,901 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:30:47,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:30:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:30:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-14 05:30:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 05:30:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-10-14 05:30:47,918 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 98 [2020-10-14 05:30:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:47,918 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-10-14 05:30:47,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:30:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-10-14 05:30:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:30:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:47,919 INFO L422 BasicCegarLoop]: trace histogram [40, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:47,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:30:47,919 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1863096367, now seen corresponding path program 45 times [2020-10-14 05:30:47,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:47,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732181445] [2020-10-14 05:30:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:50,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:52,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:52,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:30:52,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:52,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:30:52,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:52,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:52,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:30:52,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 05:30:52,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:30:52,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:53,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:53,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:53,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:53,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:53,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:53,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:53,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:53,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:53,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:53,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 792 proven. 256 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2020-10-14 05:30:53,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732181445] [2020-10-14 05:30:53,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:53,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:53,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305389355] [2020-10-14 05:30:53,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:53,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:53,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:53,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:53,190 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 19 states. [2020-10-14 05:30:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:53,316 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2020-10-14 05:30:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:53,318 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-14 05:30:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:53,319 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:30:53,319 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:30:53,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:30:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-14 05:30:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:30:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-10-14 05:30:53,337 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 100 [2020-10-14 05:30:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:53,337 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-10-14 05:30:53,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-10-14 05:30:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:30:53,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:53,342 INFO L422 BasicCegarLoop]: trace histogram [41, 24, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:53,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:30:53,342 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -957176244, now seen corresponding path program 46 times [2020-10-14 05:30:53,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:53,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650192603] [2020-10-14 05:30:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:53,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:56,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:58,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:58,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:30:58,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:58,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:30:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:58,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:58,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 825 proven. 600 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 05:30:58,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650192603] [2020-10-14 05:30:58,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:58,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:30:58,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929209297] [2020-10-14 05:30:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:30:58,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:30:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:30:58,723 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 27 states. [2020-10-14 05:30:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:58,818 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2020-10-14 05:30:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:30:58,818 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-10-14 05:30:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:58,819 INFO L225 Difference]: With dead ends: 173 [2020-10-14 05:30:58,819 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:30:58,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:30:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:30:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-14 05:30:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 05:30:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2020-10-14 05:30:58,835 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 102 [2020-10-14 05:30:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:58,835 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2020-10-14 05:30:58,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:30:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2020-10-14 05:30:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:30:58,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:58,836 INFO L422 BasicCegarLoop]: trace histogram [42, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:58,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:30:58,837 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1765218871, now seen corresponding path program 47 times [2020-10-14 05:30:58,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:58,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141386813] [2020-10-14 05:30:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:58,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 05:31:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:31:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:04,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:04,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:04,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:04,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:04,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 875 proven. 289 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-14 05:31:04,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141386813] [2020-10-14 05:31:04,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:04,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:31:04,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001989013] [2020-10-14 05:31:04,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:31:04,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:31:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:04,065 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand 20 states. [2020-10-14 05:31:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:04,187 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2020-10-14 05:31:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:31:04,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-10-14 05:31:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:04,189 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:31:04,189 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 05:31:04,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 05:31:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-14 05:31:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 05:31:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2020-10-14 05:31:04,200 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 104 [2020-10-14 05:31:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:04,201 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2020-10-14 05:31:04,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:31:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2020-10-14 05:31:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:31:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:04,202 INFO L422 BasicCegarLoop]: trace histogram [43, 25, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:04,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:31:04,202 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1386183100, now seen corresponding path program 48 times [2020-10-14 05:31:04,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:04,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921317447] [2020-10-14 05:31:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:09,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:31:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:31:09,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:09,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:09,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:09,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:09,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:09,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 910 proven. 650 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921317447] [2020-10-14 05:31:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:09,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:31:09,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622524675] [2020-10-14 05:31:09,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:31:09,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:31:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:09,616 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand 28 states. [2020-10-14 05:31:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:09,709 INFO L93 Difference]: Finished difference Result 179 states and 222 transitions. [2020-10-14 05:31:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:31:09,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-10-14 05:31:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:09,711 INFO L225 Difference]: With dead ends: 179 [2020-10-14 05:31:09,711 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:31:09,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:31:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-14 05:31:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 05:31:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-10-14 05:31:09,722 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 106 [2020-10-14 05:31:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:09,723 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-10-14 05:31:09,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:31:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-10-14 05:31:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:31:09,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:09,724 INFO L422 BasicCegarLoop]: trace histogram [44, 26, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:09,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:31:09,724 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash 551599937, now seen corresponding path program 49 times [2020-10-14 05:31:09,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:09,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121931521] [2020-10-14 05:31:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:09,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:14,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:14,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:31:14,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:15,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:15,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:15,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 945 proven. 702 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:15,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121931521] [2020-10-14 05:31:15,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:15,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:31:15,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512529814] [2020-10-14 05:31:15,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:31:15,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:31:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:15,191 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand 29 states. [2020-10-14 05:31:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:15,314 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2020-10-14 05:31:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:31:15,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2020-10-14 05:31:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:15,319 INFO L225 Difference]: With dead ends: 181 [2020-10-14 05:31:15,319 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 05:31:15,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 05:31:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-14 05:31:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 05:31:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-10-14 05:31:15,330 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 108 [2020-10-14 05:31:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:15,330 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-10-14 05:31:15,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:31:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-10-14 05:31:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:31:15,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:15,332 INFO L422 BasicCegarLoop]: trace histogram [45, 27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:15,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:31:15,332 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1254707970, now seen corresponding path program 50 times [2020-10-14 05:31:15,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:15,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71133125] [2020-10-14 05:31:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:20,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:31:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-14 05:31:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:31:20,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:20,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:20,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:20,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:20,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:20,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 999 proven. 324 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2020-10-14 05:31:20,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71133125] [2020-10-14 05:31:20,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:20,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:31:20,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491512411] [2020-10-14 05:31:20,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:31:20,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:31:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:20,582 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand 21 states. [2020-10-14 05:31:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:20,699 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2020-10-14 05:31:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:31:20,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-10-14 05:31:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:20,704 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:31:20,704 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:31:20,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:31:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-14 05:31:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 05:31:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-14 05:31:20,715 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 110 [2020-10-14 05:31:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:20,715 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-14 05:31:20,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:31:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-14 05:31:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:31:20,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:20,716 INFO L422 BasicCegarLoop]: trace histogram [46, 27, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:20,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:31:20,717 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash -411478983, now seen corresponding path program 51 times [2020-10-14 05:31:20,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:20,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637987660] [2020-10-14 05:31:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:20,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:25,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:25,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:31:25,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:25,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:31:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:26,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:26,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:26,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:26,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:26,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:26,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:26,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:26,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:26,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:26,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 1036 proven. 756 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-10-14 05:31:26,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637987660] [2020-10-14 05:31:26,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:26,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:31:26,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485959748] [2020-10-14 05:31:26,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:31:26,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:31:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:26,189 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 30 states. [2020-10-14 05:31:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:26,324 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2020-10-14 05:31:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:31:26,330 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-10-14 05:31:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:26,332 INFO L225 Difference]: With dead ends: 187 [2020-10-14 05:31:26,332 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 05:31:26,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 05:31:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-14 05:31:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 05:31:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2020-10-14 05:31:26,346 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 112 [2020-10-14 05:31:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:26,347 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2020-10-14 05:31:26,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:31:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2020-10-14 05:31:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:31:26,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:26,348 INFO L422 BasicCegarLoop]: trace histogram [47, 28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:26,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:31:26,349 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1601706870, now seen corresponding path program 52 times [2020-10-14 05:31:26,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:26,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810896609] [2020-10-14 05:31:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:26,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:31,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:31:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:31,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:31,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:31,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:31,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:31,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:31,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:31,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:31,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:31,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 1092 proven. 361 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-14 05:31:31,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810896609] [2020-10-14 05:31:31,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:31,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:31:31,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978922084] [2020-10-14 05:31:31,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:31:31,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:31:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:31:31,629 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 22 states. [2020-10-14 05:31:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:31,764 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2020-10-14 05:31:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:31:31,764 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-14 05:31:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:31,765 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:31:31,766 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:31:31,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:31:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:31:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-14 05:31:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 05:31:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2020-10-14 05:31:31,776 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 114 [2020-10-14 05:31:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:31,776 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2020-10-14 05:31:31,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:31:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2020-10-14 05:31:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:31:31,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:31,777 INFO L422 BasicCegarLoop]: trace histogram [48, 28, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:31,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:31:31,778 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 119080113, now seen corresponding path program 53 times [2020-10-14 05:31:31,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:31,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406477841] [2020-10-14 05:31:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:36,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:36,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:31:36,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:36,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:36,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:36,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:31:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:31:36,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:37,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:37,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:37,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:37,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:37,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:37,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:37,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:37,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:37,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 1131 proven. 812 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-14 05:31:37,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406477841] [2020-10-14 05:31:37,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:37,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:31:37,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137868179] [2020-10-14 05:31:37,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:31:37,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:37,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:31:37,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:31:37,286 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 31 states. [2020-10-14 05:31:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:37,390 INFO L93 Difference]: Finished difference Result 193 states and 240 transitions. [2020-10-14 05:31:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:31:37,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2020-10-14 05:31:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:37,394 INFO L225 Difference]: With dead ends: 193 [2020-10-14 05:31:37,395 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:31:37,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:31:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:31:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-14 05:31:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:31:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2020-10-14 05:31:37,405 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 116 [2020-10-14 05:31:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:37,406 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2020-10-14 05:31:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:31:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2020-10-14 05:31:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:31:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:37,407 INFO L422 BasicCegarLoop]: trace histogram [49, 29, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:37,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:31:37,407 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1203234158, now seen corresponding path program 54 times [2020-10-14 05:31:37,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:37,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594549164] [2020-10-14 05:31:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:37,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:37,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:42,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:42,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:31:42,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:42,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:31:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:42,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:42,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:42,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:42,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:42,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:42,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:42,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:42,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 1189 proven. 400 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-10-14 05:31:42,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594549164] [2020-10-14 05:31:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:42,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:31:42,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186616472] [2020-10-14 05:31:42,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:31:42,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:31:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:31:42,717 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand 23 states. [2020-10-14 05:31:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:42,856 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2020-10-14 05:31:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:31:42,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-10-14 05:31:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:42,858 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:31:42,858 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:31:42,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:31:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:31:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-14 05:31:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:31:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-14 05:31:42,875 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 118 [2020-10-14 05:31:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:42,875 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-14 05:31:42,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:31:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-14 05:31:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:31:42,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:42,877 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:42,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:31:42,877 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash -561106775, now seen corresponding path program 55 times [2020-10-14 05:31:42,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:42,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870185739] [2020-10-14 05:31:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:42,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:43,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:47,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:47,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:31:47,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:47,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:47,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:47,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:31:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 05:31:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:48,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:48,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:48,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:48,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:48,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1630 proven. 45 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-14 05:31:48,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870185739] [2020-10-14 05:31:48,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:48,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:31:48,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958283333] [2020-10-14 05:31:48,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:31:48,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:31:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:31:48,216 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 24 states. [2020-10-14 05:31:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:48,325 INFO L93 Difference]: Finished difference Result 607 states and 864 transitions. [2020-10-14 05:31:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:31:48,325 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-10-14 05:31:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:48,328 INFO L225 Difference]: With dead ends: 607 [2020-10-14 05:31:48,329 INFO L226 Difference]: Without dead ends: 594 [2020-10-14 05:31:48,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:31:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-10-14 05:31:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 132. [2020-10-14 05:31:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 05:31:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-14 05:31:48,344 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 120 [2020-10-14 05:31:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:48,344 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-14 05:31:48,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:31:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-14 05:31:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:31:48,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:48,345 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:48,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:31:48,345 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1245043095, now seen corresponding path program 56 times [2020-10-14 05:31:48,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:48,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213168534] [2020-10-14 05:31:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:53,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:53,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:53,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:31:53,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:31:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:53,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:53,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:53,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:53,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:53,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:53,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:53,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:53,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2566 backedges. 1230 proven. 870 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:31:53,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213168534] [2020-10-14 05:31:53,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:53,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:31:53,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235106520] [2020-10-14 05:31:53,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:31:53,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:31:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:31:53,903 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 32 states. [2020-10-14 05:31:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:54,019 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2020-10-14 05:31:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:31:54,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2020-10-14 05:31:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:54,021 INFO L225 Difference]: With dead ends: 203 [2020-10-14 05:31:54,021 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:31:54,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:31:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:31:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-14 05:31:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 05:31:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-10-14 05:31:54,035 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 122 [2020-10-14 05:31:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:54,035 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-10-14 05:31:54,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:31:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-10-14 05:31:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:31:54,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:54,037 INFO L422 BasicCegarLoop]: trace histogram [51, 30, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:54,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:31:54,037 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:54,038 INFO L82 PathProgramCache]: Analyzing trace with hash 163235174, now seen corresponding path program 57 times [2020-10-14 05:31:54,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:54,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114941999] [2020-10-14 05:31:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:59,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:31:59,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-14 05:31:59,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:59,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:31:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:59,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:31:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:59,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 1271 proven. 930 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:31:59,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114941999] [2020-10-14 05:31:59,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:59,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:31:59,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350709498] [2020-10-14 05:31:59,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:31:59,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:31:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:31:59,692 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 33 states. [2020-10-14 05:31:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:59,827 INFO L93 Difference]: Finished difference Result 205 states and 254 transitions. [2020-10-14 05:31:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:31:59,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2020-10-14 05:31:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:59,832 INFO L225 Difference]: With dead ends: 205 [2020-10-14 05:31:59,833 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:31:59,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:31:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:31:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-14 05:31:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 05:31:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2020-10-14 05:31:59,846 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 124 [2020-10-14 05:31:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:59,846 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2020-10-14 05:31:59,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:31:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2020-10-14 05:31:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:31:59,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:59,847 INFO L422 BasicCegarLoop]: trace histogram [52, 31, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:59,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:31:59,847 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:59,848 INFO L82 PathProgramCache]: Analyzing trace with hash 603953443, now seen corresponding path program 58 times [2020-10-14 05:31:59,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:59,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285296964] [2020-10-14 05:31:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:59,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:04,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:04,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:32:04,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 05:32:04,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:32:04,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:05,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:05,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:05,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:05,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:05,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:05,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2770 backedges. 1333 proven. 441 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2020-10-14 05:32:05,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285296964] [2020-10-14 05:32:05,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:05,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:32:05,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209216519] [2020-10-14 05:32:05,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:32:05,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:32:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:05,182 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand 24 states. [2020-10-14 05:32:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:05,322 INFO L93 Difference]: Finished difference Result 165 states and 194 transitions. [2020-10-14 05:32:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:32:05,323 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2020-10-14 05:32:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:05,324 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:32:05,324 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:32:05,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:32:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-14 05:32:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 05:32:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-10-14 05:32:05,337 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 126 [2020-10-14 05:32:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:05,337 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-10-14 05:32:05,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:32:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-10-14 05:32:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:32:05,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:05,339 INFO L422 BasicCegarLoop]: trace histogram [53, 31, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:05,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:32:05,339 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -865728418, now seen corresponding path program 59 times [2020-10-14 05:32:05,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871710871] [2020-10-14 05:32:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:10,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:32:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:32:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:10,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:10,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:10,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:10,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:10,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:10,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2875 backedges. 1376 proven. 992 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-14 05:32:10,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871710871] [2020-10-14 05:32:10,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:10,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:32:10,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444833063] [2020-10-14 05:32:10,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:32:10,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:10,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:32:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:10,950 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 34 states. [2020-10-14 05:32:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:11,108 INFO L93 Difference]: Finished difference Result 211 states and 262 transitions. [2020-10-14 05:32:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:32:11,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-10-14 05:32:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:11,110 INFO L225 Difference]: With dead ends: 211 [2020-10-14 05:32:11,110 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:32:11,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:32:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-14 05:32:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 05:32:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-10-14 05:32:11,122 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 128 [2020-10-14 05:32:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:11,122 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-10-14 05:32:11,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:32:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-10-14 05:32:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:32:11,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:11,123 INFO L422 BasicCegarLoop]: trace histogram [54, 32, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:11,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:32:11,124 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash -865028709, now seen corresponding path program 60 times [2020-10-14 05:32:11,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:11,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118977491] [2020-10-14 05:32:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:32:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:16,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:16,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:16,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:32:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 1440 proven. 484 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-14 05:32:16,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118977491] [2020-10-14 05:32:16,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:16,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:32:16,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236772856] [2020-10-14 05:32:16,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:32:16,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:16,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:32:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:16,476 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand 25 states. [2020-10-14 05:32:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:16,629 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2020-10-14 05:32:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:32:16,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2020-10-14 05:32:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:16,631 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:32:16,631 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 05:32:16,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 05:32:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-14 05:32:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 05:32:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-14 05:32:16,647 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 130 [2020-10-14 05:32:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:16,647 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-14 05:32:16,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:32:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-14 05:32:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:32:16,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:16,648 INFO L422 BasicCegarLoop]: trace histogram [55, 32, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:16,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:32:16,649 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 486663894, now seen corresponding path program 61 times [2020-10-14 05:32:16,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:16,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307827202] [2020-10-14 05:32:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:16,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:21,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:21,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:32:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3091 backedges. 1485 proven. 1056 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:22,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307827202] [2020-10-14 05:32:22,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:22,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:32:22,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232634505] [2020-10-14 05:32:22,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:32:22,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:32:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:22,314 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 35 states. [2020-10-14 05:32:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:22,481 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2020-10-14 05:32:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:32:22,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 132 [2020-10-14 05:32:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:22,483 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:32:22,483 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:32:22,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:32:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-14 05:32:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 05:32:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-10-14 05:32:22,494 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 132 [2020-10-14 05:32:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:22,494 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-10-14 05:32:22,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:32:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-10-14 05:32:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:32:22,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:22,495 INFO L422 BasicCegarLoop]: trace histogram [56, 33, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:22,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:32:22,495 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1857442413, now seen corresponding path program 62 times [2020-10-14 05:32:22,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:22,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888526127] [2020-10-14 05:32:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:27,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:32:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:27,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:32:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:28,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:28,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:28,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:28,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1530 proven. 1122 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:28,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888526127] [2020-10-14 05:32:28,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:28,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:32:28,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719024109] [2020-10-14 05:32:28,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:32:28,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:32:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:28,192 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 36 states. [2020-10-14 05:32:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:28,345 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2020-10-14 05:32:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:32:28,345 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-10-14 05:32:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:28,346 INFO L225 Difference]: With dead ends: 219 [2020-10-14 05:32:28,346 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 05:32:28,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 05:32:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-14 05:32:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 05:32:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2020-10-14 05:32:28,360 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 134 [2020-10-14 05:32:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:28,361 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2020-10-14 05:32:28,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:32:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2020-10-14 05:32:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:32:28,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:28,362 INFO L422 BasicCegarLoop]: trace histogram [57, 34, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:28,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:32:28,362 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 314226960, now seen corresponding path program 63 times [2020-10-14 05:32:28,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:28,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128966795] [2020-10-14 05:32:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:32:33,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:32:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:33,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:33,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:33,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:33,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1598 proven. 529 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2020-10-14 05:32:33,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128966795] [2020-10-14 05:32:33,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:33,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:32:33,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077950246] [2020-10-14 05:32:33,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:32:33,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:32:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:32:33,755 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand 26 states. [2020-10-14 05:32:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:33,902 INFO L93 Difference]: Finished difference Result 175 states and 206 transitions. [2020-10-14 05:32:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:32:33,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 136 [2020-10-14 05:32:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:33,904 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:32:33,904 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:32:33,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:32:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:32:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-14 05:32:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 05:32:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 175 transitions. [2020-10-14 05:32:33,914 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 175 transitions. Word has length 136 [2020-10-14 05:32:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:33,914 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 175 transitions. [2020-10-14 05:32:33,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:32:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 175 transitions. [2020-10-14 05:32:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:32:33,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:33,915 INFO L422 BasicCegarLoop]: trace histogram [58, 34, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:33,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:32:33,915 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -120004341, now seen corresponding path program 64 times [2020-10-14 05:32:33,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:33,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898041250] [2020-10-14 05:32:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:33,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:34,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:38,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:32:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:32:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:39,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:39,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:39,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:39,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:39,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:39,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:32:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 1645 proven. 1190 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-14 05:32:39,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898041250] [2020-10-14 05:32:39,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:39,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:32:39,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051040057] [2020-10-14 05:32:39,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:32:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:32:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:32:39,649 INFO L87 Difference]: Start difference. First operand 148 states and 175 transitions. Second operand 37 states. [2020-10-14 05:32:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:39,817 INFO L93 Difference]: Finished difference Result 225 states and 280 transitions. [2020-10-14 05:32:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:32:39,817 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-10-14 05:32:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:39,818 INFO L225 Difference]: With dead ends: 225 [2020-10-14 05:32:39,818 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 05:32:39,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:32:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 05:32:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-14 05:32:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 05:32:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 177 transitions. [2020-10-14 05:32:39,832 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 177 transitions. Word has length 138 [2020-10-14 05:32:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:39,833 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 177 transitions. [2020-10-14 05:32:39,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:32:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 177 transitions. [2020-10-14 05:32:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:32:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:39,834 INFO L422 BasicCegarLoop]: trace histogram [59, 35, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:39,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:32:39,834 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash -72489464, now seen corresponding path program 65 times [2020-10-14 05:32:39,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:39,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068532102] [2020-10-14 05:32:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:44,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:44,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:32:44,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:32:44,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:45,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:45,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:45,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:45,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:45,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:45,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:45,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:45,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:45,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:45,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:45,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:32:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3547 backedges. 1715 proven. 576 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2020-10-14 05:32:45,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068532102] [2020-10-14 05:32:45,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:45,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:32:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477724096] [2020-10-14 05:32:45,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:32:45,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:32:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:32:45,245 INFO L87 Difference]: Start difference. First operand 150 states and 177 transitions. Second operand 27 states. [2020-10-14 05:32:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:45,402 INFO L93 Difference]: Finished difference Result 179 states and 211 transitions. [2020-10-14 05:32:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:32:45,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 140 [2020-10-14 05:32:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:45,403 INFO L225 Difference]: With dead ends: 179 [2020-10-14 05:32:45,404 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 05:32:45,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:32:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 05:32:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-14 05:32:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 05:32:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-10-14 05:32:45,415 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 140 [2020-10-14 05:32:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:45,415 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-10-14 05:32:45,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:32:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-10-14 05:32:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:32:45,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:45,416 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:45,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:32:45,416 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1907666947, now seen corresponding path program 66 times [2020-10-14 05:32:45,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:45,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491868386] [2020-10-14 05:32:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:50,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:32:50,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 05:32:50,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:50,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:50,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:50,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 2340 proven. 66 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-14 05:32:50,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491868386] [2020-10-14 05:32:50,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:50,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:32:50,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614759107] [2020-10-14 05:32:50,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:32:50,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:32:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:32:50,866 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 28 states. [2020-10-14 05:32:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:51,024 INFO L93 Difference]: Finished difference Result 817 states and 1172 transitions. [2020-10-14 05:32:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:32:51,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-10-14 05:32:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:51,029 INFO L225 Difference]: With dead ends: 817 [2020-10-14 05:32:51,029 INFO L226 Difference]: Without dead ends: 804 [2020-10-14 05:32:51,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:32:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-10-14 05:32:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 154. [2020-10-14 05:32:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 05:32:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2020-10-14 05:32:51,048 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 142 [2020-10-14 05:32:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:51,048 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2020-10-14 05:32:51,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:32:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2020-10-14 05:32:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:32:51,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:51,049 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:51,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:32:51,049 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash 424556355, now seen corresponding path program 67 times [2020-10-14 05:32:51,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:51,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15656268] [2020-10-14 05:32:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:32:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 05:32:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:56,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:56,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:56,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:56,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:56,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:32:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1764 proven. 1260 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2020-10-14 05:32:56,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15656268] [2020-10-14 05:32:56,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:56,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:32:56,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220766880] [2020-10-14 05:32:56,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:32:56,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:32:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:32:56,816 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand 38 states. [2020-10-14 05:32:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:56,996 INFO L93 Difference]: Finished difference Result 235 states and 292 transitions. [2020-10-14 05:32:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:32:56,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2020-10-14 05:32:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:56,998 INFO L225 Difference]: With dead ends: 235 [2020-10-14 05:32:56,998 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:32:56,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:32:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:32:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-14 05:32:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 05:32:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-10-14 05:32:57,010 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 144 [2020-10-14 05:32:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:57,010 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-10-14 05:32:57,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:32:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-10-14 05:32:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:32:57,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:57,011 INFO L422 BasicCegarLoop]: trace histogram [61, 36, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:57,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:32:57,011 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -925316480, now seen corresponding path program 68 times [2020-10-14 05:32:57,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:57,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611033035] [2020-10-14 05:32:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:57,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:02,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:33:02,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:02,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:02,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:02,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:02,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3812 backedges. 1836 proven. 625 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2020-10-14 05:33:02,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611033035] [2020-10-14 05:33:02,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:02,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:33:02,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239021102] [2020-10-14 05:33:02,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:33:02,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:33:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:02,451 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 28 states. [2020-10-14 05:33:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:02,620 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2020-10-14 05:33:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:33:02,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2020-10-14 05:33:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:02,621 INFO L225 Difference]: With dead ends: 187 [2020-10-14 05:33:02,622 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 05:33:02,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 05:33:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-14 05:33:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 05:33:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 187 transitions. [2020-10-14 05:33:02,633 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 187 transitions. Word has length 146 [2020-10-14 05:33:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:02,633 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 187 transitions. [2020-10-14 05:33:02,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:33:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 187 transitions. [2020-10-14 05:33:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:33:02,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:02,634 INFO L422 BasicCegarLoop]: trace histogram [62, 36, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:02,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:33:02,635 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:02,635 INFO L82 PathProgramCache]: Analyzing trace with hash 835470267, now seen corresponding path program 69 times [2020-10-14 05:33:02,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:02,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511840460] [2020-10-14 05:33:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:02,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:07,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:33:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:07,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:33:07,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:08,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:08,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:08,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:08,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3935 backedges. 1887 proven. 1332 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-14 05:33:08,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511840460] [2020-10-14 05:33:08,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:08,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:33:08,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498333552] [2020-10-14 05:33:08,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:33:08,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:33:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:08,444 INFO L87 Difference]: Start difference. First operand 158 states and 187 transitions. Second operand 39 states. [2020-10-14 05:33:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:08,623 INFO L93 Difference]: Finished difference Result 241 states and 300 transitions. [2020-10-14 05:33:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:33:08,624 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2020-10-14 05:33:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:08,625 INFO L225 Difference]: With dead ends: 241 [2020-10-14 05:33:08,625 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:33:08,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:33:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-14 05:33:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 05:33:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2020-10-14 05:33:08,638 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 148 [2020-10-14 05:33:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:08,638 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2020-10-14 05:33:08,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:33:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2020-10-14 05:33:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:33:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:08,639 INFO L422 BasicCegarLoop]: trace histogram [63, 37, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:08,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:33:08,640 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash 657518712, now seen corresponding path program 70 times [2020-10-14 05:33:08,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:08,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104135918] [2020-10-14 05:33:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:08,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:13,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:13,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:33:13,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:33:13,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:13,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:13,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:33:13,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:13,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:33:13,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0