/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:19:05,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:19:05,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:19:05,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:19:05,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:19:05,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:19:05,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:19:05,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:19:05,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:19:05,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:19:05,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:19:05,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:19:05,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:19:05,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:19:05,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:19:05,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:19:05,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:19:05,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:19:05,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:19:05,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:19:05,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:19:05,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:19:05,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:19:05,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:19:05,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:19:05,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:19:05,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:19:05,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:19:05,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:19:05,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:19:05,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:19:05,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:19:05,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:19:05,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:19:05,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:19:05,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:19:05,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:19:05,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:19:05,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:19:05,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:19:05,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:19:05,680 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 [2020-10-28 18:19:05,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:19:05,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:19:05,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:19:05,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:19:05,715 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:19:05,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:19:05,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:19:05,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:19:05,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:19:05,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:19:05,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:19:05,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:19:05,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:19:05,718 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:19:05,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:19:05,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:19:05,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:19:05,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:19:05,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:19:05,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:19:05,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:19:05,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:19:05,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:19:05,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:19:05,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:19:05,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:19:05,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:19:05,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:19:05,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:19:05,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:19:06,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:19:06,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:19:06,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:19:06,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:19:06,149 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:19:06,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:19:06,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79ec5886/e45db8a3d11f4b6ab99c6bc05b879e0e/FLAG3947e7da7 [2020-10-28 18:19:07,181 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:19:07,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:19:07,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79ec5886/e45db8a3d11f4b6ab99c6bc05b879e0e/FLAG3947e7da7 [2020-10-28 18:19:07,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79ec5886/e45db8a3d11f4b6ab99c6bc05b879e0e [2020-10-28 18:19:07,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:19:07,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:19:07,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:19:07,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:19:07,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:19:07,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:19:07" (1/1) ... [2020-10-28 18:19:07,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b942c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:07, skipping insertion in model container [2020-10-28 18:19:07,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:19:07" (1/1) ... [2020-10-28 18:19:07,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:19:07,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:19:08,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:19:08,527 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:19:08,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:19:08,944 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:19:08,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08 WrapperNode [2020-10-28 18:19:08,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:19:08,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:19:08,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:19:08,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:19:08,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:08,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:08,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:08,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:09,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:09,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:09,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (1/1) ... [2020-10-28 18:19:09,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:19:09,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:19:09,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:19:09,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:19:09,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (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 [2020-10-28 18:19:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:19:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:19:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:19:09,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:19:09,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:19:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:19:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:19:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:19:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:19:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:19:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:19:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:19:09,227 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:19:09,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:19:09,227 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:19:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:19:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:19:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:19:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:19:09,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:19:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:19:09,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:19:09,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:19:13,121 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:19:13,121 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:19:13,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:19:13 BoogieIcfgContainer [2020-10-28 18:19:13,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:19:13,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:19:13,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:19:13,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:19:13,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:19:07" (1/3) ... [2020-10-28 18:19:13,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174dd9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:19:13, skipping insertion in model container [2020-10-28 18:19:13,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:08" (2/3) ... [2020-10-28 18:19:13,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174dd9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:19:13, skipping insertion in model container [2020-10-28 18:19:13,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:19:13" (3/3) ... [2020-10-28 18:19:13,135 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:19:13,147 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:19:13,153 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:19:13,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:19:13,203 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:19:13,203 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:19:13,203 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:19:13,203 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:19:13,203 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:19:13,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:19:13,204 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:19:13,204 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:19:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states. [2020-10-28 18:19:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:19:13,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:13,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:13,281 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:13,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1502225452, now seen corresponding path program 1 times [2020-10-28 18:19:13,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:13,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644171459] [2020-10-28 18:19:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:17,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:18,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:19:18,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:19:18,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 18:19:18,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:18,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 18:19:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-28 18:19:18,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:19:20,478 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:20,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:20,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:20,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:20,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:20,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 18:19:20,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:20,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:20,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:20,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:20,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644171459] [2020-10-28 18:19:20,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:20,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931165673] [2020-10-28 18:19:20,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:20,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:20,752 INFO L87 Difference]: Start difference. First operand 741 states. Second operand 4 states. [2020-10-28 18:19:22,037 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:19:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:28,628 INFO L93 Difference]: Finished difference Result 1385 states and 2443 transitions. [2020-10-28 18:19:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:28,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-28 18:19:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:28,670 INFO L225 Difference]: With dead ends: 1385 [2020-10-28 18:19:28,670 INFO L226 Difference]: Without dead ends: 1187 [2020-10-28 18:19:28,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2020-10-28 18:19:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1184. [2020-10-28 18:19:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2020-10-28 18:19:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1831 transitions. [2020-10-28 18:19:28,843 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1831 transitions. Word has length 315 [2020-10-28 18:19:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:28,846 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1831 transitions. [2020-10-28 18:19:28,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1831 transitions. [2020-10-28 18:19:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:19:28,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:28,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:28,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:19:28,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1362117100, now seen corresponding path program 1 times [2020-10-28 18:19:28,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:28,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849948209] [2020-10-28 18:19:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:29,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:34,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:34,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:19:34,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:19:34,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 18:19:34,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:34,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 18:19:34,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 18:19:34,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:35,544 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:35,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:35,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:35,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:19:35,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:35,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:35,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849948209] [2020-10-28 18:19:35,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:35,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:35,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451158200] [2020-10-28 18:19:35,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:35,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:35,725 INFO L87 Difference]: Start difference. First operand 1184 states and 1831 transitions. Second operand 4 states. [2020-10-28 18:19:36,967 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:19:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:42,422 INFO L93 Difference]: Finished difference Result 2410 states and 3760 transitions. [2020-10-28 18:19:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:42,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-28 18:19:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:42,441 INFO L225 Difference]: With dead ends: 2410 [2020-10-28 18:19:42,441 INFO L226 Difference]: Without dead ends: 2069 [2020-10-28 18:19:42,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2020-10-28 18:19:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 2066. [2020-10-28 18:19:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2020-10-28 18:19:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3187 transitions. [2020-10-28 18:19:42,553 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3187 transitions. Word has length 315 [2020-10-28 18:19:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:42,555 INFO L481 AbstractCegarLoop]: Abstraction has 2066 states and 3187 transitions. [2020-10-28 18:19:42,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3187 transitions. [2020-10-28 18:19:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:19:42,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:42,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:19:42,567 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash -592493232, now seen corresponding path program 1 times [2020-10-28 18:19:42,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:42,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602953097] [2020-10-28 18:19:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:42,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:45,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:47,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:47,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:19:47,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:19:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:19:47,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:47,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 18:19:47,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-28 18:19:47,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:48,971 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:48,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:48,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:49,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:19:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:49,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:49,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:49,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:19:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:49,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602953097] [2020-10-28 18:19:49,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:49,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:49,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450553928] [2020-10-28 18:19:49,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:49,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:49,162 INFO L87 Difference]: Start difference. First operand 2066 states and 3187 transitions. Second operand 4 states. [2020-10-28 18:19:50,471 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 18:19:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:55,941 INFO L93 Difference]: Finished difference Result 4352 states and 6771 transitions. [2020-10-28 18:19:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:55,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-28 18:19:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:55,965 INFO L225 Difference]: With dead ends: 4352 [2020-10-28 18:19:55,965 INFO L226 Difference]: Without dead ends: 3761 [2020-10-28 18:19:55,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2020-10-28 18:19:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3758. [2020-10-28 18:19:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3758 states. [2020-10-28 18:19:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5775 transitions. [2020-10-28 18:19:56,122 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5775 transitions. Word has length 315 [2020-10-28 18:19:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:56,123 INFO L481 AbstractCegarLoop]: Abstraction has 3758 states and 5775 transitions. [2020-10-28 18:19:56,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5775 transitions. [2020-10-28 18:19:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 18:19:56,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:56,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:56,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:19:56,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash -918303924, now seen corresponding path program 1 times [2020-10-28 18:19:56,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:56,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704247470] [2020-10-28 18:19:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:56,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:57,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:58,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:01,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 18:20:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:20:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:20:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:01,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 18:20:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:02,657 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:20:02,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:02,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:02,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:02,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:02,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:20:02,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:02,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:02,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:02,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:02,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:02,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704247470] [2020-10-28 18:20:02,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:02,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289940093] [2020-10-28 18:20:02,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:02,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:02,912 INFO L87 Difference]: Start difference. First operand 3758 states and 5775 transitions. Second operand 5 states. [2020-10-28 18:20:11,637 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:20:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:13,874 INFO L93 Difference]: Finished difference Result 11105 states and 17050 transitions. [2020-10-28 18:20:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:13,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-28 18:20:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:13,913 INFO L225 Difference]: With dead ends: 11105 [2020-10-28 18:20:13,913 INFO L226 Difference]: Without dead ends: 7364 [2020-10-28 18:20:13,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2020-10-28 18:20:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 7361. [2020-10-28 18:20:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7361 states. [2020-10-28 18:20:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11241 transitions. [2020-10-28 18:20:14,302 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11241 transitions. Word has length 315 [2020-10-28 18:20:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:14,303 INFO L481 AbstractCegarLoop]: Abstraction has 7361 states and 11241 transitions. [2020-10-28 18:20:14,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11241 transitions. [2020-10-28 18:20:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 18:20:14,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:14,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:14,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:20:14,323 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1481773764, now seen corresponding path program 1 times [2020-10-28 18:20:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361035675] [2020-10-28 18:20:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:15,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:19,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 18:20:19,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:20,915 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:20:20,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:20,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:20,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:20:20,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:20,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:20,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361035675] [2020-10-28 18:20:21,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:21,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:21,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491402186] [2020-10-28 18:20:21,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:21,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:21,205 INFO L87 Difference]: Start difference. First operand 7361 states and 11241 transitions. Second operand 5 states. [2020-10-28 18:20:30,677 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:20:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:33,419 INFO L93 Difference]: Finished difference Result 21720 states and 33127 transitions. [2020-10-28 18:20:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:33,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-28 18:20:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:33,503 INFO L225 Difference]: With dead ends: 21720 [2020-10-28 18:20:33,504 INFO L226 Difference]: Without dead ends: 14445 [2020-10-28 18:20:33,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14445 states. [2020-10-28 18:20:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14445 to 14442. [2020-10-28 18:20:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14442 states. [2020-10-28 18:20:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14442 states to 14442 states and 21923 transitions. [2020-10-28 18:20:34,365 INFO L78 Accepts]: Start accepts. Automaton has 14442 states and 21923 transitions. Word has length 317 [2020-10-28 18:20:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:34,365 INFO L481 AbstractCegarLoop]: Abstraction has 14442 states and 21923 transitions. [2020-10-28 18:20:34,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14442 states and 21923 transitions. [2020-10-28 18:20:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 18:20:34,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:34,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:34,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:20:34,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:34,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2006363457, now seen corresponding path program 1 times [2020-10-28 18:20:34,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:34,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468734731] [2020-10-28 18:20:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:34,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:35,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:39,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:39,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 18:20:39,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 18:20:39,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:40,809 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:20:40,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:40,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:40,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:40,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:20:40,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:40,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:40,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:20:40,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468734731] [2020-10-28 18:20:40,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:40,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520933216] [2020-10-28 18:20:40,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:40,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:40,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:40,978 INFO L87 Difference]: Start difference. First operand 14442 states and 21923 transitions. Second operand 5 states. [2020-10-28 18:20:50,113 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:20:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:52,971 INFO L93 Difference]: Finished difference Result 42770 states and 64877 transitions. [2020-10-28 18:20:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:52,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-28 18:20:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:53,044 INFO L225 Difference]: With dead ends: 42770 [2020-10-28 18:20:53,044 INFO L226 Difference]: Without dead ends: 28346 [2020-10-28 18:20:53,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28346 states. [2020-10-28 18:20:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28346 to 28343. [2020-10-28 18:20:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28343 states. [2020-10-28 18:20:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 42747 transitions. [2020-10-28 18:20:54,528 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 42747 transitions. Word has length 319 [2020-10-28 18:20:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:54,528 INFO L481 AbstractCegarLoop]: Abstraction has 28343 states and 42747 transitions. [2020-10-28 18:20:54,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 42747 transitions. [2020-10-28 18:20:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 18:20:54,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:54,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:54,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:20:54,575 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1654674172, now seen corresponding path program 1 times [2020-10-28 18:20:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:54,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090829518] [2020-10-28 18:20:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:55,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:57,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:57,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:58,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:59,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 18:20:59,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:20:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-28 18:20:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:01,044 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:21:01,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:01,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:01,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:01,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:01,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:01,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:21:01,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:01,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:01,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:21:01,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090829518] [2020-10-28 18:21:01,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:01,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:01,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037630137] [2020-10-28 18:21:01,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:01,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:01,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:01,225 INFO L87 Difference]: Start difference. First operand 28343 states and 42747 transitions. Second operand 5 states. [2020-10-28 18:21:10,923 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:21:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:13,912 INFO L93 Difference]: Finished difference Result 83733 states and 126139 transitions. [2020-10-28 18:21:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:13,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-28 18:21:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:14,006 INFO L225 Difference]: With dead ends: 83733 [2020-10-28 18:21:14,006 INFO L226 Difference]: Without dead ends: 55530 [2020-10-28 18:21:14,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55530 states. [2020-10-28 18:21:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55530 to 55527. [2020-10-28 18:21:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55527 states. [2020-10-28 18:21:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55527 states to 55527 states and 83175 transitions. [2020-10-28 18:21:17,055 INFO L78 Accepts]: Start accepts. Automaton has 55527 states and 83175 transitions. Word has length 321 [2020-10-28 18:21:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:17,056 INFO L481 AbstractCegarLoop]: Abstraction has 55527 states and 83175 transitions. [2020-10-28 18:21:17,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 55527 states and 83175 transitions. [2020-10-28 18:21:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 18:21:17,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:17,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:21:17,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:21:17,222 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1465443095, now seen corresponding path program 1 times [2020-10-28 18:21:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:17,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072778611] [2020-10-28 18:21:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:17,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:17,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:20,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:22,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:22,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 18:21:22,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:23,697 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:21:23,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:23,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:23,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:23,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:23,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:23,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:21:23,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072778611] [2020-10-28 18:21:23,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:23,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118805150] [2020-10-28 18:21:23,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:23,964 INFO L87 Difference]: Start difference. First operand 55527 states and 83175 transitions. Second operand 5 states. [2020-10-28 18:21:37,045 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:21:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:41,665 INFO L93 Difference]: Finished difference Result 163587 states and 244611 transitions. [2020-10-28 18:21:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:41,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-28 18:21:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:41,869 INFO L225 Difference]: With dead ends: 163587 [2020-10-28 18:21:41,869 INFO L226 Difference]: Without dead ends: 108904 [2020-10-28 18:21:41,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108904 states. [2020-10-28 18:21:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108904 to 108901. [2020-10-28 18:21:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108901 states. [2020-10-28 18:21:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108901 states to 108901 states and 161991 transitions. [2020-10-28 18:21:48,548 INFO L78 Accepts]: Start accepts. Automaton has 108901 states and 161991 transitions. Word has length 323 [2020-10-28 18:21:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:48,548 INFO L481 AbstractCegarLoop]: Abstraction has 108901 states and 161991 transitions. [2020-10-28 18:21:48,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 108901 states and 161991 transitions. [2020-10-28 18:21:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 18:21:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:48,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:21:48,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:21:48,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1591965117, now seen corresponding path program 1 times [2020-10-28 18:21:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:48,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417990435] [2020-10-28 18:21:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:48,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:48,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:53,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 18:21:53,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:21:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:21:53,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:53,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-28 18:21:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:21:55,327 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:21:55,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:21:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:55,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:21:55,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417990435] [2020-10-28 18:21:55,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:55,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559264463] [2020-10-28 18:21:55,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:55,605 INFO L87 Difference]: Start difference. First operand 108901 states and 161991 transitions. Second operand 5 states. [2020-10-28 18:22:12,038 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:22:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:22:18,479 INFO L93 Difference]: Finished difference Result 321443 states and 477427 transitions. [2020-10-28 18:22:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:22:18,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 18:22:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:22:18,977 INFO L225 Difference]: With dead ends: 321443 [2020-10-28 18:22:18,978 INFO L226 Difference]: Without dead ends: 213168 [2020-10-28 18:22:19,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:22:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213168 states. [2020-10-28 18:22:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213168 to 213165. [2020-10-28 18:22:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213165 states. [2020-10-28 18:22:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213165 states to 213165 states and 314687 transitions. [2020-10-28 18:22:32,506 INFO L78 Accepts]: Start accepts. Automaton has 213165 states and 314687 transitions. Word has length 325 [2020-10-28 18:22:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:22:32,506 INFO L481 AbstractCegarLoop]: Abstraction has 213165 states and 314687 transitions. [2020-10-28 18:22:32,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:22:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 213165 states and 314687 transitions. [2020-10-28 18:22:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 18:22:32,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:22:32,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:22:32,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:22:32,675 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:22:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:22:32,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1687763110, now seen corresponding path program 1 times [2020-10-28 18:22:32,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:22:32,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648896430] [2020-10-28 18:22:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:22:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:32,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:34,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:37,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 18:22:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:39,156 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:22:39,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:39,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:39,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:39,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:22:39,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648896430] [2020-10-28 18:22:39,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:39,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540537751] [2020-10-28 18:22:39,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:39,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:39,330 INFO L87 Difference]: Start difference. First operand 213165 states and 314687 transitions. Second operand 5 states.