/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:54:05,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:54:05,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:54:05,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:54:05,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:54:05,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:54:05,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:54:05,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:54:05,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:54:05,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:54:05,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:54:05,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:54:05,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:54:05,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:54:05,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:54:05,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:54:05,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:54:05,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:54:05,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:54:05,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:54:05,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:54:05,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:54:05,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:54:05,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:54:05,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:54:05,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:54:05,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:54:05,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:54:05,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:54:05,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:54:05,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:54:05,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:54:05,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:54:05,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:54:05,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:54:05,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:54:05,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:54:05,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:54:05,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:54:05,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:54:05,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:54:05,822 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 [2020-10-29 13:54:05,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:54:05,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:54:05,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:54:05,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:54:05,896 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:54:05,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:54:05,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:54:05,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:54:05,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:54:05,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:54:05,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:54:05,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:54:05,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:54:05,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:54:05,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:54:05,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:54:05,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:54:05,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:54:05,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:54:05,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:54:05,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:54:05,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:54:05,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:54:05,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:54:05,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:54:05,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:54:05,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:54:05,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:54:05,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:54:05,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:54:06,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:54:06,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:54:06,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:54:06,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:54:06,364 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:54:06,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:54:06,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f49766f/0a20e2cd754e43bdab246c5e04f67258/FLAG33888fb12 [2020-10-29 13:54:07,134 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:54:07,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:54:07,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f49766f/0a20e2cd754e43bdab246c5e04f67258/FLAG33888fb12 [2020-10-29 13:54:07,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f49766f/0a20e2cd754e43bdab246c5e04f67258 [2020-10-29 13:54:07,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:54:07,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:54:07,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:54:07,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:54:07,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:54:07,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:54:07" (1/1) ... [2020-10-29 13:54:07,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea51ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:07, skipping insertion in model container [2020-10-29 13:54:07,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:54:07" (1/1) ... [2020-10-29 13:54:07,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:54:07,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:54:07,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:54:08,002 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:54:08,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:54:08,133 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:54:08,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08 WrapperNode [2020-10-29 13:54:08,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:54:08,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:54:08,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:54:08,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:54:08,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (1/1) ... [2020-10-29 13:54:08,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:54:08,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:54:08,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:54:08,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:54:08,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (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 [2020-10-29 13:54:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:54:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:54:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:54:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:54:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:54:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:54:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:54:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:54:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:54:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:54:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:54:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:54:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:54:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:54:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:54:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:54:09,181 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:54:09,182 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:54:09,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:54:09 BoogieIcfgContainer [2020-10-29 13:54:09,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:54:09,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:54:09,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:54:09,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:54:09,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:54:07" (1/3) ... [2020-10-29 13:54:09,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2946e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:54:09, skipping insertion in model container [2020-10-29 13:54:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:54:08" (2/3) ... [2020-10-29 13:54:09,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2946e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:54:09, skipping insertion in model container [2020-10-29 13:54:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:54:09" (3/3) ... [2020-10-29 13:54:09,194 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:54:09,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:54:09,212 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:54:09,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:54:09,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:54:09,257 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:54:09,257 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:54:09,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:54:09,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:54:09,257 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:54:09,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:54:09,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:54:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-10-29 13:54:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:54:09,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:09,294 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] [2020-10-29 13:54:09,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash 723589953, now seen corresponding path program 1 times [2020-10-29 13:54:09,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:09,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937969040] [2020-10-29 13:54:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:09,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:10,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:12,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:14,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:14,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:54:14,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:54:14,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 13:54:14,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:14,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:14,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:54:14,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:54:14,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:54:14,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:54:15,270 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:15,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:15,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:15,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:15,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:54:15,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:15,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:15,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:54:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:15,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937969040] [2020-10-29 13:54:15,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:15,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:54:15,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984544752] [2020-10-29 13:54:15,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:54:15,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:54:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:54:15,381 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 9 states. [2020-10-29 13:54:15,888 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:54:17,712 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:54:18,126 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-29 13:54:18,521 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:54:18,904 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:54:19,312 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:19,402 INFO L93 Difference]: Finished difference Result 1035 states and 1644 transitions. [2020-10-29 13:54:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:54:19,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-29 13:54:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:19,426 INFO L225 Difference]: With dead ends: 1035 [2020-10-29 13:54:19,427 INFO L226 Difference]: Without dead ends: 881 [2020-10-29 13:54:19,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:54:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-29 13:54:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 283. [2020-10-29 13:54:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-29 13:54:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 422 transitions. [2020-10-29 13:54:19,538 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 422 transitions. Word has length 79 [2020-10-29 13:54:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:19,539 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 422 transitions. [2020-10-29 13:54:19,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:54:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 422 transitions. [2020-10-29 13:54:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:54:19,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:19,544 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] [2020-10-29 13:54:19,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:54:19,544 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 381577461, now seen corresponding path program 1 times [2020-10-29 13:54:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:19,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65220300] [2020-10-29 13:54:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:19,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:21,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:24,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:24,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:54:24,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:54:24,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:54:24,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:24,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 13:54:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:54:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:54:24,998 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:25,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:25,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:25,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:25,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:25,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:54:25,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:25,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:54:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:25,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65220300] [2020-10-29 13:54:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:25,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:25,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985581434] [2020-10-29 13:54:25,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:25,067 INFO L87 Difference]: Start difference. First operand 283 states and 422 transitions. Second operand 4 states. [2020-10-29 13:54:25,422 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:26,276 INFO L93 Difference]: Finished difference Result 721 states and 1118 transitions. [2020-10-29 13:54:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:26,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-29 13:54:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:26,285 INFO L225 Difference]: With dead ends: 721 [2020-10-29 13:54:26,285 INFO L226 Difference]: Without dead ends: 486 [2020-10-29 13:54:26,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-29 13:54:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 483. [2020-10-29 13:54:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-29 13:54:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 740 transitions. [2020-10-29 13:54:26,365 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 740 transitions. Word has length 80 [2020-10-29 13:54:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:26,367 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 740 transitions. [2020-10-29 13:54:26,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 740 transitions. [2020-10-29 13:54:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:54:26,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:26,381 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] [2020-10-29 13:54:26,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:54:26,381 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1637004220, now seen corresponding path program 1 times [2020-10-29 13:54:26,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:26,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630525707] [2020-10-29 13:54:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:26,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:26,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:26,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:27,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:28,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:28,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:54:28,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:54:28,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-10-29 13:54:28,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:28,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:54:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:54:28,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:54:29,244 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:29,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:29,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:29,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:54:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:29,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:29,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630525707] [2020-10-29 13:54:29,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:29,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:29,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885900750] [2020-10-29 13:54:29,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:29,313 INFO L87 Difference]: Start difference. First operand 483 states and 740 transitions. Second operand 4 states. [2020-10-29 13:54:29,694 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:30,529 INFO L93 Difference]: Finished difference Result 1289 states and 2020 transitions. [2020-10-29 13:54:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:30,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:54:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:30,535 INFO L225 Difference]: With dead ends: 1289 [2020-10-29 13:54:30,536 INFO L226 Difference]: Without dead ends: 854 [2020-10-29 13:54:30,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-10-29 13:54:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 851. [2020-10-29 13:54:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-10-29 13:54:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1322 transitions. [2020-10-29 13:54:30,598 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1322 transitions. Word has length 81 [2020-10-29 13:54:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:30,599 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 1322 transitions. [2020-10-29 13:54:30,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1322 transitions. [2020-10-29 13:54:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:54:30,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:30,601 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] [2020-10-29 13:54:30,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:54:30,602 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash -687848226, now seen corresponding path program 1 times [2020-10-29 13:54:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815172440] [2020-10-29 13:54:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:31,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:31,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:31,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:54:31,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:54:31,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-29 13:54:31,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:31,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:31,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:54:31,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:54:31,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:32,200 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:32,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:32,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:32,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:32,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:32,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:32,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815172440] [2020-10-29 13:54:32,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:32,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:32,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550312269] [2020-10-29 13:54:32,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:32,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:32,285 INFO L87 Difference]: Start difference. First operand 851 states and 1322 transitions. Second operand 4 states. [2020-10-29 13:54:32,643 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:33,796 INFO L93 Difference]: Finished difference Result 2329 states and 3662 transitions. [2020-10-29 13:54:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:33,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:54:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:33,808 INFO L225 Difference]: With dead ends: 2329 [2020-10-29 13:54:33,808 INFO L226 Difference]: Without dead ends: 1526 [2020-10-29 13:54:33,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-29 13:54:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1523. [2020-10-29 13:54:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2020-10-29 13:54:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2378 transitions. [2020-10-29 13:54:33,908 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2378 transitions. Word has length 82 [2020-10-29 13:54:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:33,910 INFO L481 AbstractCegarLoop]: Abstraction has 1523 states and 2378 transitions. [2020-10-29 13:54:33,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2378 transitions. [2020-10-29 13:54:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:54:33,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:33,914 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] [2020-10-29 13:54:33,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:54:33,914 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951739, now seen corresponding path program 1 times [2020-10-29 13:54:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:33,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097665568] [2020-10-29 13:54:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:34,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:34,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:54:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:54:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:54:34,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:35,053 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:35,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:35,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:35,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:35,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:54:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:35,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:54:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097665568] [2020-10-29 13:54:35,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:35,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:35,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270353274] [2020-10-29 13:54:35,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:35,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:35,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:35,108 INFO L87 Difference]: Start difference. First operand 1523 states and 2378 transitions. Second operand 4 states. [2020-10-29 13:54:35,487 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:36,614 INFO L93 Difference]: Finished difference Result 4217 states and 6622 transitions. [2020-10-29 13:54:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:36,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:54:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:36,630 INFO L225 Difference]: With dead ends: 4217 [2020-10-29 13:54:36,631 INFO L226 Difference]: Without dead ends: 2742 [2020-10-29 13:54:36,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2020-10-29 13:54:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2739. [2020-10-29 13:54:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-10-29 13:54:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4274 transitions. [2020-10-29 13:54:36,810 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4274 transitions. Word has length 83 [2020-10-29 13:54:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:36,811 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4274 transitions. [2020-10-29 13:54:36,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4274 transitions. [2020-10-29 13:54:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:54:36,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:36,813 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] [2020-10-29 13:54:36,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:54:36,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 339353982, now seen corresponding path program 1 times [2020-10-29 13:54:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319124412] [2020-10-29 13:54:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:36,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:37,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:54:37,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:54:37,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:54:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:37,632 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:37,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:37,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:37,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:37,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:37,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:37,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:54:37,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:37,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:37,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:37,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:37,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:37,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319124412] [2020-10-29 13:54:37,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972489301] [2020-10-29 13:54:37,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:37,741 INFO L87 Difference]: Start difference. First operand 2739 states and 4274 transitions. Second operand 4 states. [2020-10-29 13:54:38,178 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:39,369 INFO L93 Difference]: Finished difference Result 7609 states and 11894 transitions. [2020-10-29 13:54:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:39,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:54:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:39,396 INFO L225 Difference]: With dead ends: 7609 [2020-10-29 13:54:39,397 INFO L226 Difference]: Without dead ends: 4918 [2020-10-29 13:54:39,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2020-10-29 13:54:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4915. [2020-10-29 13:54:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4915 states. [2020-10-29 13:54:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 7634 transitions. [2020-10-29 13:54:39,729 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 7634 transitions. Word has length 84 [2020-10-29 13:54:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:39,729 INFO L481 AbstractCegarLoop]: Abstraction has 4915 states and 7634 transitions. [2020-10-29 13:54:39,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 7634 transitions. [2020-10-29 13:54:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:54:39,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:39,731 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] [2020-10-29 13:54:39,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:54:39,731 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1844247078, now seen corresponding path program 1 times [2020-10-29 13:54:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:39,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336357265] [2020-10-29 13:54:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:39,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:39,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:40,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:40,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:54:40,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:54:40,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-29 13:54:40,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:40,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:54:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:54:40,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:54:40,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:41,154 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:41,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:41,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:41,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:41,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:54:41,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:41,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:41,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:41,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:41,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336357265] [2020-10-29 13:54:41,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:41,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:54:41,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477306893] [2020-10-29 13:54:41,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:54:41,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:54:41,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:54:41,268 INFO L87 Difference]: Start difference. First operand 4915 states and 7634 transitions. Second operand 9 states. [2020-10-29 13:54:42,594 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:54:43,011 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:54:43,385 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-29 13:54:43,755 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:54:44,123 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:54:44,528 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:54:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:47,221 INFO L93 Difference]: Finished difference Result 30117 states and 46558 transitions. [2020-10-29 13:54:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:54:47,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-29 13:54:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:47,320 INFO L225 Difference]: With dead ends: 30117 [2020-10-29 13:54:47,320 INFO L226 Difference]: Without dead ends: 25250 [2020-10-29 13:54:47,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:54:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2020-10-29 13:54:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 25235. [2020-10-29 13:54:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25235 states. [2020-10-29 13:54:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25235 states to 25235 states and 38898 transitions. [2020-10-29 13:54:49,216 INFO L78 Accepts]: Start accepts. Automaton has 25235 states and 38898 transitions. Word has length 85 [2020-10-29 13:54:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:49,216 INFO L481 AbstractCegarLoop]: Abstraction has 25235 states and 38898 transitions. [2020-10-29 13:54:49,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:54:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25235 states and 38898 transitions. [2020-10-29 13:54:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:54:49,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:49,218 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] [2020-10-29 13:54:49,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:54:49,219 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1942278331, now seen corresponding path program 1 times [2020-10-29 13:54:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:49,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643003177] [2020-10-29 13:54:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:49,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:49,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:49,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:54:49,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:54:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-29 13:54:49,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:49,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:54:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:54:49,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:49,999 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:49,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:50,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:50,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:50,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:54:50,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:50,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:54:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:54:50,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643003177] [2020-10-29 13:54:50,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:50,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:54:50,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288942281] [2020-10-29 13:54:50,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:54:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:54:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:54:50,048 INFO L87 Difference]: Start difference. First operand 25235 states and 38898 transitions. Second operand 4 states. [2020-10-29 13:54:50,490 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:54:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:54:53,611 INFO L93 Difference]: Finished difference Result 69017 states and 105974 transitions. [2020-10-29 13:54:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:54:53,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-29 13:54:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:54:53,735 INFO L225 Difference]: With dead ends: 69017 [2020-10-29 13:54:53,735 INFO L226 Difference]: Without dead ends: 43830 [2020-10-29 13:54:53,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:54:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43830 states. [2020-10-29 13:54:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43830 to 43827. [2020-10-29 13:54:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43827 states. [2020-10-29 13:54:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43827 states to 43827 states and 66738 transitions. [2020-10-29 13:54:56,430 INFO L78 Accepts]: Start accepts. Automaton has 43827 states and 66738 transitions. Word has length 86 [2020-10-29 13:54:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:54:56,430 INFO L481 AbstractCegarLoop]: Abstraction has 43827 states and 66738 transitions. [2020-10-29 13:54:56,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:54:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 43827 states and 66738 transitions. [2020-10-29 13:54:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:54:56,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:54:56,432 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] [2020-10-29 13:54:56,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:54:56,432 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:54:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:54:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash 879192195, now seen corresponding path program 1 times [2020-10-29 13:54:56,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:54:56,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365620777] [2020-10-29 13:54:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:54:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:56,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:57,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:57,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:54:57,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:54:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:54:57,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:57,385 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:54:57,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:54:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:54:57,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:54:57,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:54:57,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:54:57,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:54:57,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:54:57,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:54:57,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:54:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:54:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:54:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:54:57,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:54:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:54:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365620777] [2020-10-29 13:54:57,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:54:57,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:54:57,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367212236] [2020-10-29 13:54:57,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:54:57,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:54:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:54:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:54:57,466 INFO L87 Difference]: Start difference. First operand 43827 states and 66738 transitions. Second operand 6 states. [2020-10-29 13:54:58,009 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:55:00,190 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-29 13:55:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:03,844 INFO L93 Difference]: Finished difference Result 131385 states and 200118 transitions. [2020-10-29 13:55:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:55:03,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-29 13:55:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:04,078 INFO L225 Difference]: With dead ends: 131385 [2020-10-29 13:55:04,079 INFO L226 Difference]: Without dead ends: 87606 [2020-10-29 13:55:04,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:55:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87606 states. [2020-10-29 13:55:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87606 to 87603. [2020-10-29 13:55:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87603 states. [2020-10-29 13:55:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87603 states to 87603 states and 132722 transitions. [2020-10-29 13:55:09,772 INFO L78 Accepts]: Start accepts. Automaton has 87603 states and 132722 transitions. Word has length 87 [2020-10-29 13:55:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:09,772 INFO L481 AbstractCegarLoop]: Abstraction has 87603 states and 132722 transitions. [2020-10-29 13:55:09,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:55:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87603 states and 132722 transitions. [2020-10-29 13:55:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:55:09,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:09,774 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] [2020-10-29 13:55:09,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:55:09,775 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash 376147368, now seen corresponding path program 1 times [2020-10-29 13:55:09,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:09,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321478539] [2020-10-29 13:55:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:55:10,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-29 13:55:10,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:10,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:55:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-29 13:55:10,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:55:10,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:10,663 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:55:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:10,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:10,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:10,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:10,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:55:10,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:10,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:10,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:10,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321478539] [2020-10-29 13:55:10,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:10,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:55:10,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577848858] [2020-10-29 13:55:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:55:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:55:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:10,709 INFO L87 Difference]: Start difference. First operand 87603 states and 132722 transitions. Second operand 5 states. [2020-10-29 13:55:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:21,533 INFO L93 Difference]: Finished difference Result 178230 states and 268468 transitions. [2020-10-29 13:55:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:55:21,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-29 13:55:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:21,933 INFO L225 Difference]: With dead ends: 178230 [2020-10-29 13:55:21,933 INFO L226 Difference]: Without dead ends: 178227 [2020-10-29 13:55:21,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:55:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178227 states. [2020-10-29 13:55:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178227 to 90675. [2020-10-29 13:55:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90675 states. [2020-10-29 13:55:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90675 states to 90675 states and 135794 transitions. [2020-10-29 13:55:29,358 INFO L78 Accepts]: Start accepts. Automaton has 90675 states and 135794 transitions. Word has length 87 [2020-10-29 13:55:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:29,360 INFO L481 AbstractCegarLoop]: Abstraction has 90675 states and 135794 transitions. [2020-10-29 13:55:29,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:55:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 90675 states and 135794 transitions. [2020-10-29 13:55:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 13:55:29,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:29,362 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] [2020-10-29 13:55:29,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:55:29,362 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash -926480737, now seen corresponding path program 1 times [2020-10-29 13:55:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:29,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193682496] [2020-10-29 13:55:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:29,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:29,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 13:55:29,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 13:55:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:30,150 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:55:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:30,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:30,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:30,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:30,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:30,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:30,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193682496] [2020-10-29 13:55:30,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:30,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:30,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744046901] [2020-10-29 13:55:30,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:30,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:30,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:30,206 INFO L87 Difference]: Start difference. First operand 90675 states and 135794 transitions. Second operand 4 states. [2020-10-29 13:55:30,584 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:55:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:38,411 INFO L93 Difference]: Finished difference Result 202907 states and 303400 transitions. [2020-10-29 13:55:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:38,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-29 13:55:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:38,781 INFO L225 Difference]: With dead ends: 202907 [2020-10-29 13:55:38,781 INFO L226 Difference]: Without dead ends: 112280 [2020-10-29 13:55:38,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112280 states. [2020-10-29 13:55:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112280 to 111925. [2020-10-29 13:55:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111925 states. [2020-10-29 13:55:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111925 states to 111925 states and 166596 transitions. [2020-10-29 13:55:46,653 INFO L78 Accepts]: Start accepts. Automaton has 111925 states and 166596 transitions. Word has length 88 [2020-10-29 13:55:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:46,653 INFO L481 AbstractCegarLoop]: Abstraction has 111925 states and 166596 transitions. [2020-10-29 13:55:46,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 111925 states and 166596 transitions. [2020-10-29 13:55:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 13:55:46,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:46,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:46,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:55:46,703 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1057527355, now seen corresponding path program 1 times [2020-10-29 13:55:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:46,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265409631] [2020-10-29 13:55:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:47,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:49,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:49,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 13:55:49,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:55:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-29 13:55:49,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:49,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:55:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:55:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 13:55:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:49,595 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:55:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:49,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:49,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:49,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:49,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:49,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:49,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:55:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265409631] [2020-10-29 13:55:49,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:55:49,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:55:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112407114] [2020-10-29 13:55:49,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:55:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:55:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:49,667 INFO L87 Difference]: Start difference. First operand 111925 states and 166596 transitions. Second operand 5 states. [2020-10-29 13:55:50,081 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:55:52,812 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:55:53,253 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:56:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:04,657 INFO L93 Difference]: Finished difference Result 285694 states and 425930 transitions. [2020-10-29 13:56:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:56:04,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-10-29 13:56:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:05,144 INFO L225 Difference]: With dead ends: 285694 [2020-10-29 13:56:05,144 INFO L226 Difference]: Without dead ends: 195067 [2020-10-29 13:56:05,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:56:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195067 states. [2020-10-29 13:56:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195067 to 194325. [2020-10-29 13:56:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194325 states. [2020-10-29 13:56:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194325 states to 194325 states and 287236 transitions. [2020-10-29 13:56:19,460 INFO L78 Accepts]: Start accepts. Automaton has 194325 states and 287236 transitions. Word has length 119 [2020-10-29 13:56:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:19,460 INFO L481 AbstractCegarLoop]: Abstraction has 194325 states and 287236 transitions. [2020-10-29 13:56:19,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:56:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 194325 states and 287236 transitions. [2020-10-29 13:56:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 13:56:19,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:19,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:56:19,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:56:19,503 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 14892643, now seen corresponding path program 1 times [2020-10-29 13:56:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:19,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026820604] [2020-10-29 13:56:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:19,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:19,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:24,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:24,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 13:56:24,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:56:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 13:56:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:25,054 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:56:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:25,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:25,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:25,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:56:25,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:25,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:25,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:25,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026820604] [2020-10-29 13:56:25,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:25,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:56:25,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345480049] [2020-10-29 13:56:25,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:56:25,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:25,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:56:25,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:56:25,150 INFO L87 Difference]: Start difference. First operand 194325 states and 287236 transitions. Second operand 9 states. [2020-10-29 13:56:29,611 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-29 13:56:30,053 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-29 13:56:30,442 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:56:30,847 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:56:31,245 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:56:31,686 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 202