/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:05:56,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:05:56,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:05:56,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:05:56,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:05:56,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:05:56,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:05:56,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:05:56,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:05:56,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:05:56,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:05:56,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:05:56,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:05:56,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:05:56,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:05:56,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:05:56,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:05:56,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:05:56,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:05:56,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:05:56,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:05:56,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:05:56,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:05:56,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:05:56,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:05:56,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:05:56,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:05:56,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:05:56,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:05:56,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:05:56,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:05:56,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:05:56,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:05:56,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:05:56,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:05:56,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:05:56,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:05:56,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:05:56,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:05:56,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:05:56,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:05:56,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 17:05:56,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:05:56,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:05:56,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:05:56,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:05:56,235 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:05:56,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:05:56,235 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:05:56,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:05:56,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:05:56,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:05:56,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:05:56,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:05:56,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:05:56,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:05:56,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:05:56,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:05:56,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:05:56,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:05:56,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:05:56,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:05:56,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:05:56,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:05:56,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:05:56,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:05:56,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:05:56,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:05:56,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:05:56,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:05:56,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:05:56,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:05:56,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:05:56,765 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:05:56,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:05:56,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:05:56,774 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:05:56,776 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 17:05:56,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99efc7546/f61d3467675f4c138c7975571d214db9/FLAG6aec7894b [2020-09-24 17:05:57,420 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:05:57,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-24 17:05:57,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99efc7546/f61d3467675f4c138c7975571d214db9/FLAG6aec7894b [2020-09-24 17:05:57,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99efc7546/f61d3467675f4c138c7975571d214db9 [2020-09-24 17:05:57,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:05:57,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:05:57,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:05:57,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:05:57,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:05:57,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:05:57" (1/1) ... [2020-09-24 17:05:57,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3f9b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:57, skipping insertion in model container [2020-09-24 17:05:57,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:05:57" (1/1) ... [2020-09-24 17:05:57,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:05:57,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:05:58,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:05:58,049 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:05:58,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:05:58,096 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:05:58,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58 WrapperNode [2020-09-24 17:05:58,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:05:58,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:05:58,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:05:58,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:05:58,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... [2020-09-24 17:05:58,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:05:58,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:05:58,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:05:58,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:05:58,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:05:58,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:05:58,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:05:58,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:05:58,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:05:58,322 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 17:05:58,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:05:58,323 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-24 17:05:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 17:05:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 17:05:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:05:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:05:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:05:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:05:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:05:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 17:05:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:05:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:05:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 17:05:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-24 17:05:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:05:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:05:58,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:05:58,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:05:58,667 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:05:58,668 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:05:58,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:05:58 BoogieIcfgContainer [2020-09-24 17:05:58,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:05:58,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:05:58,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:05:58,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:05:58,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:05:57" (1/3) ... [2020-09-24 17:05:58,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafde28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:05:58, skipping insertion in model container [2020-09-24 17:05:58,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:05:58" (2/3) ... [2020-09-24 17:05:58,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafde28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:05:58, skipping insertion in model container [2020-09-24 17:05:58,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:05:58" (3/3) ... [2020-09-24 17:05:58,683 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-24 17:05:58,694 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:05:58,704 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:05:58,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:05:58,752 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:05:58,753 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:05:58,753 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:05:58,753 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:05:58,753 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:05:58,753 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:05:58,753 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:05:58,753 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:05:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-24 17:05:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 17:05:58,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:05:58,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:05:58,786 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:05:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:05:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-24 17:05:58,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:05:58,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149320218] [2020-09-24 17:05:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:05:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:05:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:05:59,607 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:05:59,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 17:05:59,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:05:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-09-24 17:05:59,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:05:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:05:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 17:05:59,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:05:59,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:05:59,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:05:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:05:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:05:59,815 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:05:59,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:05:59,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:05:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:05:59,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:05:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:05:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:05:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:05:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:05:59,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:05:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:05:59,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:05:59,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:05:59,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:05:59,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:05:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:05:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:05:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:05:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:05:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:05:59,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:05:59,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 17:05:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:05:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:05:59,844 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:05:59,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:05:59,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:05:59,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:05:59,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:05:59,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:05:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:05:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:05:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:05:59,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 17:05:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:05:59,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:05:59,872 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:05:59,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 17:05:59,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:05:59,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:05:59,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:05:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:05:59,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:05:59,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:05:59,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:05:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:05:59,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149320218] [2020-09-24 17:05:59,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:05:59,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 17:05:59,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136007756] [2020-09-24 17:05:59,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:05:59,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:05:59,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:05:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:05:59,917 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-24 17:06:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:00,874 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-24 17:06:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 17:06:00,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-24 17:06:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:00,892 INFO L225 Difference]: With dead ends: 221 [2020-09-24 17:06:00,893 INFO L226 Difference]: Without dead ends: 138 [2020-09-24 17:06:00,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:06:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-24 17:06:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-24 17:06:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 17:06:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-24 17:06:00,979 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-24 17:06:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:00,980 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-24 17:06:00,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:06:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-24 17:06:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:06:00,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:00,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:00,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:06:00,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-24 17:06:00,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:00,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46301414] [2020-09-24 17:06:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:01,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:01,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,280 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:06:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:06:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2263 [2020-09-24 17:06:03,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 17:06:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:06:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 17:06:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:03,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:03,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,524 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:06:03,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:03,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:06:03,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:03,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:03,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:03,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:03,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:06:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:03,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:03,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:06:03,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:03,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:03,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:03,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:03,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 17:06:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,556 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:03,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:06:03,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:06:03,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:03,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 17:06:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 17:06:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 17:06:03,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 17:06:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:03,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-24 17:06:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:03,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:03,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:03,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:06:03,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:03,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 17:06:03,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:03,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:06:03,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:06:03,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:06:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:06:03,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46301414] [2020-09-24 17:06:03,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:06:03,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 17:06:03,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898959311] [2020-09-24 17:06:03,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 17:06:03,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 17:06:03,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:06:03,897 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-24 17:06:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:05,583 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-24 17:06:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 17:06:05,584 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-24 17:06:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:05,587 INFO L225 Difference]: With dead ends: 170 [2020-09-24 17:06:05,587 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 17:06:05,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 17:06:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 17:06:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-24 17:06:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 17:06:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-24 17:06:05,609 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-24 17:06:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:05,609 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-24 17:06:05,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 17:06:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-24 17:06:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 17:06:05,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:05,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:05,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:06:05,613 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:05,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-24 17:06:05,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:05,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790821338] [2020-09-24 17:06:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:05,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:05,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 17:06:08,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:06:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2963 [2020-09-24 17:06:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:06:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 17:06:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 17:06:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 17:06:08,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,886 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:06:08,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:06:08,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:08,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:06:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:08,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:06:08,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:08,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:08,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 17:06:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,908 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:08,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:06:08,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:08,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:08,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 17:06:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,938 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 17:06:08,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:06:08,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:08,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:08,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 17:06:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,958 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:08,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 17:06:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:06:08,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 17:06:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:08,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:08,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:08,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:06:08,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:06:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:06:08,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790821338] [2020-09-24 17:06:08,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:06:08,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 17:06:08,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596102067] [2020-09-24 17:06:08,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 17:06:08,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 17:06:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:06:08,994 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-24 17:06:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:10,683 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-24 17:06:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 17:06:10,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 17:06:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:10,687 INFO L225 Difference]: With dead ends: 195 [2020-09-24 17:06:10,687 INFO L226 Difference]: Without dead ends: 193 [2020-09-24 17:06:10,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-24 17:06:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-24 17:06:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-24 17:06:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 17:06:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-24 17:06:10,708 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-24 17:06:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:10,708 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-24 17:06:10,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 17:06:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-24 17:06:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 17:06:10,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:10,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:10,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:06:10,711 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-24 17:06:10,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:10,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139648969] [2020-09-24 17:06:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:10,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:22,908 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:22,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 17:06:22,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:22,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12175 [2020-09-24 17:06:22,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:22,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:06:22,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 17:06:22,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 17:06:22,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,039 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:06:23,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:06:23,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:06:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,048 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:23,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:06:23,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:23,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 17:06:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,056 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:23,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:06:23,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:23,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 17:06:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 17:06:23,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:06:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 17:06:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:23,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:06:23,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:06:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 17:06:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:23,144 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:23,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:23,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:23,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:06:23,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:23,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:23,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:23,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:06:23,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:06:23,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139648969] [2020-09-24 17:06:23,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:06:23,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:06:23,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022654095] [2020-09-24 17:06:23,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:06:23,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:06:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:06:23,157 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 14 states. [2020-09-24 17:06:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:06:24,618 INFO L93 Difference]: Finished difference Result 265 states and 298 transitions. [2020-09-24 17:06:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 17:06:24,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-09-24 17:06:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:06:24,622 INFO L225 Difference]: With dead ends: 265 [2020-09-24 17:06:24,622 INFO L226 Difference]: Without dead ends: 263 [2020-09-24 17:06:24,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2020-09-24 17:06:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-24 17:06:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 209. [2020-09-24 17:06:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-09-24 17:06:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2020-09-24 17:06:24,649 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 67 [2020-09-24 17:06:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:06:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2020-09-24 17:06:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:06:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2020-09-24 17:06:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 17:06:24,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:06:24,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:06:24,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:06:24,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:06:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:06:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-24 17:06:24,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:06:24,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352023276] [2020-09-24 17:06:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:06:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:24,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:24,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:43,811 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:43,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 17:06:43,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:06:43,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19140 [2020-09-24 17:06:43,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 17:06:43,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 17:06:43,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 17:06:43,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:06:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,026 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:06:45,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:06:45,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:06:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:06:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:06:45,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-24 17:06:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,048 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:45,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:06:45,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:06:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:06:45,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 17:06:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,169 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 17:06:45,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 17:06:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,182 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:06:45,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 17:06:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,202 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:06:45,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:06:45,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:06:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:06:45,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 17:06:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:06:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:06:45,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:06:45,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 17:06:45,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:06:45,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 17:06:45,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:06:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:06:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:06:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:06:45,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:06:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 17:06:45,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352023276] [2020-09-24 17:06:45,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:06:45,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 17:06:45,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614719937] [2020-09-24 17:06:45,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 17:06:45,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:06:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 17:06:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-09-24 17:06:45,521 INFO L87 Difference]: Start difference. First operand 209 states and 230 transitions. Second operand 29 states. [2020-09-24 17:06:46,978 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-09-24 17:06:47,147 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-09-24 17:06:47,344 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57