/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/array-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:38,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:38,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:38,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:38,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:38,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:38,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:38,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:38,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:38,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:38,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:38,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:38,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:38,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:38,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:38,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:38,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:38,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:38,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:38,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:38,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:38,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:38,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:38,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:38,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:38,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:38,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:38,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:38,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:38,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:38,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:38,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:38,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:38,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:38,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:38,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:38,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:38,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:38,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:38,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:38,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:38,404 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 [2020-10-13 23:22:38,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:38,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:38,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:38,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:38,430 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:38,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:38,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:38,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:38,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:38,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:38,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:38,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:38,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:38,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:38,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:38,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:38,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:38,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:38,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:38,435 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; [2020-10-13 23:22:38,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:38,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:38,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:38,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:38,804 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:38,805 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2020-10-13 23:22:38,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef340f147/918475a7f35a4532b6bea4f84da14aa2/FLAG957f547de [2020-10-13 23:22:39,340 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:39,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2020-10-13 23:22:39,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef340f147/918475a7f35a4532b6bea4f84da14aa2/FLAG957f547de [2020-10-13 23:22:39,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef340f147/918475a7f35a4532b6bea4f84da14aa2 [2020-10-13 23:22:39,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:39,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:39,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:39,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:39,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:39,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:39" (1/1) ... [2020-10-13 23:22:39,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4207e6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:39, skipping insertion in model container [2020-10-13 23:22:39,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:39" (1/1) ... [2020-10-13 23:22:39,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:39,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:39,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:39,984 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:40,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:40,123 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:40,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40 WrapperNode [2020-10-13 23:22:40,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:40,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:40,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:40,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:40,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (1/1) ... [2020-10-13 23:22:40,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:40,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:40,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:40,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:40,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (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 [2020-10-13 23:22:40,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:22:40,297 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:40,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:40,655 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:40,655 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 23:22:40,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:40 BoogieIcfgContainer [2020-10-13 23:22:40,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:40,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:40,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:40,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:40,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:39" (1/3) ... [2020-10-13 23:22:40,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a78a6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:40, skipping insertion in model container [2020-10-13 23:22:40,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:40" (2/3) ... [2020-10-13 23:22:40,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a78a6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:40, skipping insertion in model container [2020-10-13 23:22:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:40" (3/3) ... [2020-10-13 23:22:40,681 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2020-10-13 23:22:40,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:40,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:40,727 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:40,778 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:40,779 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:40,779 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:40,779 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:40,779 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:40,779 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:40,780 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:40,780 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 23:22:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:22:40,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:40,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:40,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1109148347, now seen corresponding path program 1 times [2020-10-13 23:22:40,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:40,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963771613] [2020-10-13 23:22:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:44,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:22:44,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:22:44,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3277 [2020-10-13 23:22:44,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:44,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:22:44,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:44,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:22:44,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:22:44,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:44,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:44,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963771613] [2020-10-13 23:22:44,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:44,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:44,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758478812] [2020-10-13 23:22:44,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:44,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:44,405 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 23:22:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:44,565 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2020-10-13 23:22:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:44,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 23:22:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:44,578 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:22:44,579 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:22:44,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:22:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 23:22:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:22:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-13 23:22:44,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2020-10-13 23:22:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:44,635 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-13 23:22:44,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-13 23:22:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:22:44,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:44,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:44,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:44,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash -322584269, now seen corresponding path program 1 times [2020-10-13 23:22:44,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:44,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624718795] [2020-10-13 23:22:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:44,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:49,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:22:49,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:22:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:22:49,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:49,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:49,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:49,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:22:49,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:49,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:49,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:49,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:49,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:49,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:49,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:49,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624718795] [2020-10-13 23:22:49,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:49,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:22:49,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998952229] [2020-10-13 23:22:49,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:22:49,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:22:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:49,707 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-10-13 23:22:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:49,843 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-13 23:22:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:22:49,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 23:22:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:49,845 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:22:49,845 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:22:49,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:22:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 23:22:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:22:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 23:22:49,855 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2020-10-13 23:22:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:49,856 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 23:22:49,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:22:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 23:22:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:22:49,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:49,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:49,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:49,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 171629905, now seen corresponding path program 1 times [2020-10-13 23:22:49,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:49,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849954655] [2020-10-13 23:22:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:50,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:50,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:54,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:22:54,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:22:54,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:22:54,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:54,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:22:54,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:54,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:22:54,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:54,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:54,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:54,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:54,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:54,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:54,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:54,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:22:54,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849954655] [2020-10-13 23:22:54,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:54,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:22:54,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760805854] [2020-10-13 23:22:54,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:22:54,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:22:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:22:54,959 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-13 23:22:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:55,222 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-13 23:22:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:22:55,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 23:22:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:55,224 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:22:55,224 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:22:55,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:22:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:22:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-13 23:22:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:22:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 23:22:55,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-10-13 23:22:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:55,246 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 23:22:55,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:22:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 23:22:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:22:55,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:55,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:55,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:22:55,253 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1412380863, now seen corresponding path program 1 times [2020-10-13 23:22:55,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:55,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385695224] [2020-10-13 23:22:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:57,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:23:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:23:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:23:00,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:23:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:00,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:00,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:00,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:23:00,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385695224] [2020-10-13 23:23:00,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:00,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:00,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239313976] [2020-10-13 23:23:00,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:00,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:00,348 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-13 23:23:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:00,617 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-13 23:23:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:00,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-13 23:23:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:00,627 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:23:00,627 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:23:00,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:23:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 23:23:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:23:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 23:23:00,637 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 46 [2020-10-13 23:23:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:00,637 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 23:23:00,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 23:23:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:23:00,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:00,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:00,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:23:00,640 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -541579825, now seen corresponding path program 2 times [2020-10-13 23:23:00,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:00,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346803176] [2020-10-13 23:23:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:23:05,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-13 23:23:05,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:23:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:23:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:06,488 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-13 23:23:09,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:09,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:09,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:09,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:09,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:09,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:09,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346803176] [2020-10-13 23:23:09,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:09,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:23:09,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122450092] [2020-10-13 23:23:09,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:23:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:23:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:23:09,871 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 44 states. [2020-10-13 23:23:10,620 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-13 23:23:11,000 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-13 23:23:11,420 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-13 23:23:11,655 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-13 23:23:12,122 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 23:23:12,656 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 23:23:13,625 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-13 23:23:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:17,437 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2020-10-13 23:23:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 23:23:17,442 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 64 [2020-10-13 23:23:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:17,444 INFO L225 Difference]: With dead ends: 151 [2020-10-13 23:23:17,444 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:23:17,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=449, Invalid=5713, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 23:23:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:23:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2020-10-13 23:23:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:23:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-10-13 23:23:17,463 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 64 [2020-10-13 23:23:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:17,464 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-10-13 23:23:17,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:23:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-10-13 23:23:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:23:17,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:17,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:17,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:23:17,466 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2090829139, now seen corresponding path program 3 times [2020-10-13 23:23:17,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:17,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270575304] [2020-10-13 23:23:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:22,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:22,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:23:22,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:23:22,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:22,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:23:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:23:22,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:22,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:22,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:22,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:22,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:22,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:22,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:22,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:22,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:22,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:22,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:23:22,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270575304] [2020-10-13 23:23:22,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:22,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:22,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393438525] [2020-10-13 23:23:22,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:22,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:22,591 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 10 states. [2020-10-13 23:23:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:23,224 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2020-10-13 23:23:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:23,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:23:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:23,228 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:23:23,228 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:23:23,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:23:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:23:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2020-10-13 23:23:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:23:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-13 23:23:23,249 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 66 [2020-10-13 23:23:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:23,250 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-13 23:23:23,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-13 23:23:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:23:23,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:23,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:23,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:23,252 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash 246171885, now seen corresponding path program 4 times [2020-10-13 23:23:23,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:23,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587032543] [2020-10-13 23:23:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:28,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:23:28,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:28,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:23:28,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:28,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:28,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:23:28,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:28,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:28,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:28,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:23:28,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587032543] [2020-10-13 23:23:28,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:28,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:28,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064405118] [2020-10-13 23:23:28,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:28,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:28,368 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 10 states. [2020-10-13 23:23:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:28,812 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-10-13 23:23:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:23:28,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:23:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:28,814 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:23:28,814 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:23:28,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:23:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-13 23:23:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:23:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 23:23:28,829 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 66 [2020-10-13 23:23:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:28,829 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 23:23:28,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 23:23:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:23:28,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:28,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:28,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:28,831 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:28,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash 79084765, now seen corresponding path program 5 times [2020-10-13 23:23:28,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:28,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588858851] [2020-10-13 23:23:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:28,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:34,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:34,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 23:23:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:23:34,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:36,112 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-13 23:23:36,282 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 23:23:36,626 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 23:23:36,838 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 23:23:37,058 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-13 23:23:37,297 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-13 23:23:37,670 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-13 23:23:37,884 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-13 23:23:38,113 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-13 23:23:38,344 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 23:23:38,794 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-13 23:23:39,001 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-13 23:23:39,409 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-13 23:23:41,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:41,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588858851] [2020-10-13 23:23:41,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:41,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 23:23:41,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145208507] [2020-10-13 23:23:41,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 23:23:41,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:41,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 23:23:41,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2944, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 23:23:41,623 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 57 states. [2020-10-13 23:23:42,376 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-13 23:23:43,000 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 71 [2020-10-13 23:23:43,545 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 91 [2020-10-13 23:23:43,988 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-13 23:23:44,303 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-13 23:23:44,984 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 66 [2020-10-13 23:23:45,849 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 92 [2020-10-13 23:23:46,300 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-13 23:23:46,619 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-13 23:23:47,509 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 69 [2020-10-13 23:23:48,083 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 95 [2020-10-13 23:23:48,558 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-13 23:23:48,877 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-13 23:23:49,134 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-13 23:23:49,840 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2020-10-13 23:23:50,522 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 85 [2020-10-13 23:23:51,060 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2020-10-13 23:23:51,575 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-13 23:23:51,868 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-13 23:23:52,677 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 34 [2020-10-13 23:23:53,087 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2020-10-13 23:23:53,696 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 31 [2020-10-13 23:23:54,182 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 54 [2020-10-13 23:23:54,886 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 69 [2020-10-13 23:23:55,499 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2020-10-13 23:23:56,146 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 67 [2020-10-13 23:23:56,945 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2020-10-13 23:23:57,611 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 60 [2020-10-13 23:23:57,985 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 36 [2020-10-13 23:23:58,667 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 62 [2020-10-13 23:23:59,403 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-13 23:23:59,957 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-13 23:24:00,263 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-13 23:24:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:01,610 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2020-10-13 23:24:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 23:24:01,612 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 82 [2020-10-13 23:24:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:01,614 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:24:01,614 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:24:01,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1292, Invalid=10698, Unknown=0, NotChecked=0, Total=11990 [2020-10-13 23:24:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:24:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-10-13 23:24:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:24:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2020-10-13 23:24:01,649 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 82 [2020-10-13 23:24:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:01,650 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2020-10-13 23:24:01,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 23:24:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2020-10-13 23:24:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:24:01,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:01,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:01,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:24:01,652 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1204828613, now seen corresponding path program 6 times [2020-10-13 23:24:01,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:01,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355678641] [2020-10-13 23:24:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:24:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:24:06,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:06,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:06,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:06,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:06,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:06,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:06,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:06,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:06,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:06,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:06,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:24:06,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355678641] [2020-10-13 23:24:06,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:06,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:06,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926109198] [2020-10-13 23:24:06,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:06,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:06,817 INFO L87 Difference]: Start difference. First operand 136 states and 149 transitions. Second operand 12 states. [2020-10-13 23:24:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:08,243 INFO L93 Difference]: Finished difference Result 271 states and 303 transitions. [2020-10-13 23:24:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:24:08,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 23:24:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:08,245 INFO L225 Difference]: With dead ends: 271 [2020-10-13 23:24:08,245 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:24:08,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:24:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:24:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2020-10-13 23:24:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:24:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 171 transitions. [2020-10-13 23:24:08,289 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 171 transitions. Word has length 84 [2020-10-13 23:24:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:08,289 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 171 transitions. [2020-10-13 23:24:08,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 171 transitions. [2020-10-13 23:24:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:24:08,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:08,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:08,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:24:08,299 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash -295611269, now seen corresponding path program 7 times [2020-10-13 23:24:08,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:08,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400574559] [2020-10-13 23:24:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:08,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:13,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:24:13,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:24:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:24:13,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:13,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:13,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:13,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:13,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:13,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:13,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:13,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:24:13,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400574559] [2020-10-13 23:24:13,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:13,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:13,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661304339] [2020-10-13 23:24:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:13,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:13,486 INFO L87 Difference]: Start difference. First operand 157 states and 171 transitions. Second operand 12 states. [2020-10-13 23:24:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:14,326 INFO L93 Difference]: Finished difference Result 251 states and 272 transitions. [2020-10-13 23:24:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:24:14,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 23:24:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:14,328 INFO L225 Difference]: With dead ends: 251 [2020-10-13 23:24:14,328 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:24:14,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:24:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:24:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-13 23:24:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:24:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-13 23:24:14,349 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 84 [2020-10-13 23:24:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:14,350 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-13 23:24:14,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-13 23:24:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:24:14,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:14,354 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:14,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:24:14,354 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1175415915, now seen corresponding path program 8 times [2020-10-13 23:24:14,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:14,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540286958] [2020-10-13 23:24:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:19,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:19,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:24:19,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:24:19,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:21,085 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-13 23:24:22,853 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 23:24:29,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:29,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:29,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:29,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:29,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:29,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:24:29,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:29,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:29,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:24:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:24:29,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540286958] [2020-10-13 23:24:29,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:29,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 23:24:29,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740071504] [2020-10-13 23:24:29,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 23:24:29,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 23:24:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5212, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:24:29,973 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 74 states. [2020-10-13 23:24:35,662 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-13 23:24:36,321 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-13 23:24:37,298 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-13 23:24:38,118 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-13 23:24:38,813 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 23:24:39,301 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 23:24:45,910 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-13 23:24:46,699 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-13 23:25:01,653 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-13 23:25:02,207 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-13 23:25:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:05,556 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2020-10-13 23:25:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-13 23:25:05,557 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-10-13 23:25:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:05,560 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:25:05,560 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 23:25:05,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=479, Invalid=15523, Unknown=0, NotChecked=0, Total=16002 [2020-10-13 23:25:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 23:25:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 176. [2020-10-13 23:25:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 23:25:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-10-13 23:25:05,584 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 100 [2020-10-13 23:25:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:05,585 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-10-13 23:25:05,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 23:25:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-10-13 23:25:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:25:05,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:05,587 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:05,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:25:05,588 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 526715465, now seen corresponding path program 9 times [2020-10-13 23:25:05,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:05,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937470931] [2020-10-13 23:25:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:05,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:10,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:25:10,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:25:10,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:25:10,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:10,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:10,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:10,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:10,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:10,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:10,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:10,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:10,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:10,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:25:10,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937470931] [2020-10-13 23:25:10,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:10,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:10,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613328402] [2020-10-13 23:25:10,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:10,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:10,967 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 14 states. [2020-10-13 23:25:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:14,558 INFO L93 Difference]: Finished difference Result 274 states and 304 transitions. [2020-10-13 23:25:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:25:14,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 23:25:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:14,563 INFO L225 Difference]: With dead ends: 274 [2020-10-13 23:25:14,563 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:25:14,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:25:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:25:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2020-10-13 23:25:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 23:25:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2020-10-13 23:25:14,586 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 102 [2020-10-13 23:25:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:14,586 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2020-10-13 23:25:14,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2020-10-13 23:25:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:25:14,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:14,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:14,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:25:14,589 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1011636361, now seen corresponding path program 10 times [2020-10-13 23:25:14,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:14,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994101132] [2020-10-13 23:25:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:14,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:14,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:25:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:25:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:19,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:19,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:19,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:19,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:19,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:19,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:19,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:19,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:25:20,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994101132] [2020-10-13 23:25:20,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:20,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:20,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609193683] [2020-10-13 23:25:20,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:20,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:20,006 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand 14 states. [2020-10-13 23:25:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:22,131 INFO L93 Difference]: Finished difference Result 299 states and 322 transitions. [2020-10-13 23:25:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:25:22,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 23:25:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:22,134 INFO L225 Difference]: With dead ends: 299 [2020-10-13 23:25:22,134 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:25:22,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:25:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:25:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2020-10-13 23:25:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 23:25:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 23:25:22,151 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 102 [2020-10-13 23:25:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:22,151 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 23:25:22,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 23:25:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 23:25:22,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:22,153 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:22,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:25:22,154 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash -871558023, now seen corresponding path program 11 times [2020-10-13 23:25:22,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:22,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814397026] [2020-10-13 23:25:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:27,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:27,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:25:27,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:27,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:25:27,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:27,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-13 23:25:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:25:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 23:25:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:28,684 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-13 23:25:28,974 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 23:25:29,402 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-13 23:25:29,788 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-13 23:25:30,142 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-13 23:25:30,549 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-13 23:25:30,969 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 23:25:31,394 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-13 23:25:31,793 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 23:25:32,234 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-13 23:25:32,679 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 23:25:33,123 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 23:25:33,631 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-13 23:25:33,920 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-13 23:25:34,404 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-13 23:25:34,762 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-13 23:25:35,133 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-13 23:25:35,494 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-13 23:25:35,863 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-13 23:25:36,238 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-13 23:25:36,664 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-13 23:25:37,089 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-13 23:25:37,548 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-13 23:25:38,045 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-13 23:25:38,430 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-13 23:25:38,947 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-13 23:25:39,614 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-13 23:25:40,258 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:25:40,976 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-13 23:25:41,716 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-13 23:25:42,471 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-13 23:25:43,144 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-13 23:25:43,688 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-13 23:25:44,204 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-13 23:25:44,699 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-13 23:25:45,471 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-10-13 23:25:46,184 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-13 23:25:46,927 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2020-10-13 23:25:47,677 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-13 23:25:48,460 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-10-13 23:25:49,607 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-13 23:25:50,513 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2020-10-13 23:25:51,296 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2020-10-13 23:25:51,853 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-13 23:25:52,922 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-13 23:25:53,589 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-13 23:25:54,255 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-13 23:25:54,904 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-13 23:25:55,701 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 23:25:56,356 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 23:25:57,371 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 23:25:58,284 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 23:25:59,490 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-13 23:26:00,439 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2020-10-13 23:26:01,319 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-13 23:26:02,236 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 23:26:03,189 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-13 23:26:04,141 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 23:26:05,105 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-13 23:26:06,117 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 23:26:07,043 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-13 23:26:08,319 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-13 23:26:08,967 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-10-13 23:26:09,549 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-13 23:26:14,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 16 proven. 184 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:26:14,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814397026] [2020-10-13 23:26:14,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:14,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-13 23:26:14,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264265817] [2020-10-13 23:26:14,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-13 23:26:14,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-13 23:26:14,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=6926, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 23:26:14,613 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 86 states. [2020-10-13 23:26:15,603 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 3 [2020-10-13 23:26:16,707 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 18 [2020-10-13 23:26:17,906 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 60 [2020-10-13 23:26:19,168 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 66 [2020-10-13 23:26:19,969 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2020-10-13 23:26:20,966 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-13 23:26:21,557 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-13 23:26:22,059 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-13 23:26:22,649 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-13 23:26:23,591 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-13 23:26:24,256 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61