/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:50:32,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:50:32,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:50:32,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:50:32,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:50:32,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:50:32,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:50:32,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:50:32,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:50:32,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:50:32,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:50:32,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:50:32,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:50:32,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:50:32,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:50:32,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:50:32,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:50:32,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:50:32,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:50:32,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:50:32,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:50:32,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:50:32,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:50:32,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:50:32,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:50:32,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:50:32,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:50:32,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:50:32,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:50:32,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:50:32,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:50:32,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:50:32,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:50:32,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:50:32,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:50:32,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:50:32,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:50:32,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:50:32,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:50:32,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:50:32,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:50:32,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:50:32,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:50:32,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:50:32,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:50:32,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:50:32,727 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:50:32,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:50:32,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:50:32,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:50:32,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:50:32,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:50:32,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:50:32,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:50:32,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:50:32,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:50:32,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:50:32,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:50:32,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:50:32,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:50:32,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:50:32,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:50:32,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:50:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:32,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:50:32,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:50:32,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:50:32,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:50:32,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:50:32,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:50:32,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:50:32,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:50:33,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:50:33,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:50:33,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:50:33,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:50:33,129 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:50:33,130 INFO L432 ainManager$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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:50:33,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2013fd666/f9b88382d24d4630a4b2bb488f251f99/FLAG67b4a596f [2020-10-28 18:50:33,912 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:50:33,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:50:33,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2013fd666/f9b88382d24d4630a4b2bb488f251f99/FLAG67b4a596f [2020-10-28 18:50:34,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2013fd666/f9b88382d24d4630a4b2bb488f251f99 [2020-10-28 18:50:34,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:50:34,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:50:34,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:34,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:50:34,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:50:34,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11344cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34, skipping insertion in model container [2020-10-28 18:50:34,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:50:34,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:50:34,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:34,633 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:50:34,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:50:34,789 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:50:34,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34 WrapperNode [2020-10-28 18:50:34,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:50:34,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:50:34,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:50:34,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:50:34,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... [2020-10-28 18:50:34,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:50:34,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:50:34,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:50:34,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:50:34,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:50:35,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:50:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:50:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:50:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:50:35,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:50:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:50:35,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:50:35,011 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:50:35,012 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:50:35,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:50:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:50:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:50:35,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:50:36,097 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:50:36,098 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:50:36,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:36 BoogieIcfgContainer [2020-10-28 18:50:36,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:50:36,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:50:36,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:50:36,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:50:36,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:50:34" (1/3) ... [2020-10-28 18:50:36,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196064b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:36, skipping insertion in model container [2020-10-28 18:50:36,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:50:34" (2/3) ... [2020-10-28 18:50:36,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196064b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:50:36, skipping insertion in model container [2020-10-28 18:50:36,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:50:36" (3/3) ... [2020-10-28 18:50:36,137 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:50:36,164 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:50:36,178 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:50:36,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:50:36,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:50:36,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:50:36,244 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:50:36,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:50:36,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:50:36,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:50:36,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:50:36,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:50:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-10-28 18:50:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:50:36,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:36,297 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] [2020-10-28 18:50:36,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1411810681, now seen corresponding path program 1 times [2020-10-28 18:50:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:36,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673890125] [2020-10-28 18:50:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:38,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:38,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:50:38,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:50:38,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2230 [2020-10-28 18:50:38,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:38,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:50:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 18:50:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:50:39,437 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:50:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:39,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:39,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:50:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:39,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:39,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673890125] [2020-10-28 18:50:39,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:39,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836394869] [2020-10-28 18:50:39,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:39,518 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 4 states. [2020-10-28 18:50:39,942 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:50:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:41,087 INFO L93 Difference]: Finished difference Result 323 states and 519 transitions. [2020-10-28 18:50:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:41,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 18:50:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:41,103 INFO L225 Difference]: With dead ends: 323 [2020-10-28 18:50:41,104 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 18:50:41,111 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 [2020-10-28 18:50:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 18:50:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2020-10-28 18:50:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 18:50:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 354 transitions. [2020-10-28 18:50:41,215 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 354 transitions. Word has length 55 [2020-10-28 18:50:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:41,215 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 354 transitions. [2020-10-28 18:50:41,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 354 transitions. [2020-10-28 18:50:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:50:41,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:41,219 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] [2020-10-28 18:50:41,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:50:41,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1521986906, now seen corresponding path program 1 times [2020-10-28 18:50:41,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:41,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318437979] [2020-10-28 18:50:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:42,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:46,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:46,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:50:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:50:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:50:46,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:46,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 18:50:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:50:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:50:46,561 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:50:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:46,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:46,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:50:46,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:46,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:46,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:46,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:50:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:46,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318437979] [2020-10-28 18:50:46,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:46,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678828467] [2020-10-28 18:50:46,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:46,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:46,627 INFO L87 Difference]: Start difference. First operand 240 states and 354 transitions. Second operand 4 states. [2020-10-28 18:50:46,882 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:50:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:47,699 INFO L93 Difference]: Finished difference Result 578 states and 874 transitions. [2020-10-28 18:50:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:47,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:50:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:47,704 INFO L225 Difference]: With dead ends: 578 [2020-10-28 18:50:47,705 INFO L226 Difference]: Without dead ends: 410 [2020-10-28 18:50:47,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:50:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-28 18:50:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 407. [2020-10-28 18:50:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-28 18:50:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 604 transitions. [2020-10-28 18:50:47,745 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 604 transitions. Word has length 58 [2020-10-28 18:50:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:47,745 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 604 transitions. [2020-10-28 18:50:47,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 604 transitions. [2020-10-28 18:50:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:50:47,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:47,748 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] [2020-10-28 18:50:47,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:50:47,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1260689956, now seen corresponding path program 1 times [2020-10-28 18:50:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:47,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871278358] [2020-10-28 18:50:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:48,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:52,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:52,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:50:52,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:50:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:50:52,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:52,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:50:52,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:50:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:50:53,041 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:50:53,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:53,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:53,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:53,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:53,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:53,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:53,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871278358] [2020-10-28 18:50:53,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:53,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246092269] [2020-10-28 18:50:53,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:53,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:53,109 INFO L87 Difference]: Start difference. First operand 407 states and 604 transitions. Second operand 4 states. [2020-10-28 18:50:53,342 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:50:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:50:54,135 INFO L93 Difference]: Finished difference Result 985 states and 1482 transitions. [2020-10-28 18:50:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:50:54,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:50:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:50:54,141 INFO L225 Difference]: With dead ends: 985 [2020-10-28 18:50:54,141 INFO L226 Difference]: Without dead ends: 698 [2020-10-28 18:50:54,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:50:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-28 18:50:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 695. [2020-10-28 18:50:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 18:50:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1026 transitions. [2020-10-28 18:50:54,192 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1026 transitions. Word has length 58 [2020-10-28 18:50:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:50:54,193 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1026 transitions. [2020-10-28 18:50:54,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:50:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1026 transitions. [2020-10-28 18:50:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:50:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:50:54,197 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] [2020-10-28 18:50:54,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:50:54,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:50:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:50:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1777280484, now seen corresponding path program 1 times [2020-10-28 18:50:54,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:50:54,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114997997] [2020-10-28 18:50:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:50:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:54,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:59,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:50:59,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:50:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:50:59,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:59,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:50:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:50:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:50:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:59,492 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:50:59,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:50:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:50:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:50:59,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:50:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:50:59,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:50:59,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:50:59,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:50:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:50:59,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114997997] [2020-10-28 18:50:59,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:50:59,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:50:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052780905] [2020-10-28 18:50:59,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:50:59,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:50:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:50:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:50:59,535 INFO L87 Difference]: Start difference. First operand 695 states and 1026 transitions. Second operand 4 states. [2020-10-28 18:50:59,756 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:51:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:00,523 INFO L93 Difference]: Finished difference Result 1775 states and 2632 transitions. [2020-10-28 18:51:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:51:00,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:51:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:00,534 INFO L225 Difference]: With dead ends: 1775 [2020-10-28 18:51:00,534 INFO L226 Difference]: Without dead ends: 1176 [2020-10-28 18:51:00,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:51:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2020-10-28 18:51:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1173. [2020-10-28 18:51:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-10-28 18:51:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1696 transitions. [2020-10-28 18:51:00,613 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1696 transitions. Word has length 58 [2020-10-28 18:51:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:00,616 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1696 transitions. [2020-10-28 18:51:00,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:51:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1696 transitions. [2020-10-28 18:51:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:00,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:00,627 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] [2020-10-28 18:51:00,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:51:00,627 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 352662626, now seen corresponding path program 1 times [2020-10-28 18:51:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:00,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635232401] [2020-10-28 18:51:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:00,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:00,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:03,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:03,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:03,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-28 18:51:03,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:03,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:51:03,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:04,157 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:04,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:04,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:04,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:04,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:04,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:51:04,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:04,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:04,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:04,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:04,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:04,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:04,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635232401] [2020-10-28 18:51:04,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:04,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19874839] [2020-10-28 18:51:04,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:04,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:04,224 INFO L87 Difference]: Start difference. First operand 1173 states and 1696 transitions. Second operand 8 states. [2020-10-28 18:51:04,461 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:05,284 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:51:06,202 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:51:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:06,427 INFO L93 Difference]: Finished difference Result 5019 states and 7330 transitions. [2020-10-28 18:51:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:06,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-28 18:51:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:06,451 INFO L225 Difference]: With dead ends: 5019 [2020-10-28 18:51:06,451 INFO L226 Difference]: Without dead ends: 4212 [2020-10-28 18:51:06,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4212 states. [2020-10-28 18:51:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4212 to 1271. [2020-10-28 18:51:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-10-28 18:51:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1802 transitions. [2020-10-28 18:51:06,608 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1802 transitions. Word has length 59 [2020-10-28 18:51:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:06,612 INFO L481 AbstractCegarLoop]: Abstraction has 1271 states and 1802 transitions. [2020-10-28 18:51:06,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1802 transitions. [2020-10-28 18:51:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:06,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:06,614 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] [2020-10-28 18:51:06,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:51:06,615 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1062520981, now seen corresponding path program 1 times [2020-10-28 18:51:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:06,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563251085] [2020-10-28 18:51:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:06,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:06,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:10,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:10,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3362 [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:10,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:51:10,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:10,370 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:10,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:10,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:10,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:10,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:10,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:10,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:51:10,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:10,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:10,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:10,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:51:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:10,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563251085] [2020-10-28 18:51:10,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:10,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:10,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309149892] [2020-10-28 18:51:10,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:10,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:10,458 INFO L87 Difference]: Start difference. First operand 1271 states and 1802 transitions. Second operand 8 states. [2020-10-28 18:51:10,837 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:51:11,706 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:51:12,687 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:12,991 INFO L93 Difference]: Finished difference Result 5665 states and 8095 transitions. [2020-10-28 18:51:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:12,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-28 18:51:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:13,021 INFO L225 Difference]: With dead ends: 5665 [2020-10-28 18:51:13,023 INFO L226 Difference]: Without dead ends: 5266 [2020-10-28 18:51:13,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:51:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2020-10-28 18:51:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 1315. [2020-10-28 18:51:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2020-10-28 18:51:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1860 transitions. [2020-10-28 18:51:13,200 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1860 transitions. Word has length 59 [2020-10-28 18:51:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:13,202 INFO L481 AbstractCegarLoop]: Abstraction has 1315 states and 1860 transitions. [2020-10-28 18:51:13,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1860 transitions. [2020-10-28 18:51:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:51:13,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:13,204 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] [2020-10-28 18:51:13,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:51:13,204 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1300051068, now seen corresponding path program 1 times [2020-10-28 18:51:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:13,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319404981] [2020-10-28 18:51:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:13,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:13,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:16,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:51:16,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2831 [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:51:16,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:16,505 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:16,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:16,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:16,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:16,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 18:51:16,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:16,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:16,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319404981] [2020-10-28 18:51:16,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:16,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:51:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692670229] [2020-10-28 18:51:16,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:51:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:51:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:51:16,617 INFO L87 Difference]: Start difference. First operand 1315 states and 1860 transitions. Second operand 8 states. [2020-10-28 18:51:16,868 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:17,653 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:51:18,563 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:51:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:18,860 INFO L93 Difference]: Finished difference Result 4666 states and 6664 transitions. [2020-10-28 18:51:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:51:18,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-28 18:51:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:18,881 INFO L225 Difference]: With dead ends: 4666 [2020-10-28 18:51:18,882 INFO L226 Difference]: Without dead ends: 3773 [2020-10-28 18:51:18,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:51:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2020-10-28 18:51:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 1364. [2020-10-28 18:51:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2020-10-28 18:51:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1893 transitions. [2020-10-28 18:51:19,079 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1893 transitions. Word has length 59 [2020-10-28 18:51:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:19,079 INFO L481 AbstractCegarLoop]: Abstraction has 1364 states and 1893 transitions. [2020-10-28 18:51:19,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:51:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1893 transitions. [2020-10-28 18:51:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:51:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:19,081 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] [2020-10-28 18:51:19,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:51:19,082 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1131971501, now seen corresponding path program 1 times [2020-10-28 18:51:19,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476706645] [2020-10-28 18:51:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:20,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:24,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:24,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:51:24,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:24,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:51:24,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:24,383 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:24,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:24,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:24,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:24,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:24,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476706645] [2020-10-28 18:51:24,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:24,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961502924] [2020-10-28 18:51:24,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:24,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:24,427 INFO L87 Difference]: Start difference. First operand 1364 states and 1893 transitions. Second operand 6 states. [2020-10-28 18:51:24,676 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:25,291 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:26,132 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:51:26,355 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:51:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:26,441 INFO L93 Difference]: Finished difference Result 3357 states and 4769 transitions. [2020-10-28 18:51:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:26,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 18:51:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:26,453 INFO L225 Difference]: With dead ends: 3357 [2020-10-28 18:51:26,453 INFO L226 Difference]: Without dead ends: 2642 [2020-10-28 18:51:26,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2020-10-28 18:51:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1601. [2020-10-28 18:51:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-10-28 18:51:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2241 transitions. [2020-10-28 18:51:26,638 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2241 transitions. Word has length 60 [2020-10-28 18:51:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:26,638 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2241 transitions. [2020-10-28 18:51:26,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2241 transitions. [2020-10-28 18:51:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:51:26,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:26,641 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] [2020-10-28 18:51:26,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:51:26,641 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -38744446, now seen corresponding path program 1 times [2020-10-28 18:51:26,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:26,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619945502] [2020-10-28 18:51:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:28,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:31,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:31,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:51:31,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:51:31,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:31,918 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:31,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:31,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:31,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:31,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619945502] [2020-10-28 18:51:31,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:31,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:31,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324623837] [2020-10-28 18:51:31,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:31,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:31,954 INFO L87 Difference]: Start difference. First operand 1601 states and 2241 transitions. Second operand 6 states. [2020-10-28 18:51:32,223 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:33,019 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:33,759 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:51:33,988 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:51:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:34,115 INFO L93 Difference]: Finished difference Result 3915 states and 5571 transitions. [2020-10-28 18:51:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:34,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 18:51:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:34,131 INFO L225 Difference]: With dead ends: 3915 [2020-10-28 18:51:34,131 INFO L226 Difference]: Without dead ends: 3200 [2020-10-28 18:51:34,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2020-10-28 18:51:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 1947. [2020-10-28 18:51:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1947 states. [2020-10-28 18:51:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2758 transitions. [2020-10-28 18:51:34,383 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2758 transitions. Word has length 60 [2020-10-28 18:51:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:34,383 INFO L481 AbstractCegarLoop]: Abstraction has 1947 states and 2758 transitions. [2020-10-28 18:51:34,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2758 transitions. [2020-10-28 18:51:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:51:34,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:34,386 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] [2020-10-28 18:51:34,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:51:34,386 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash 154523381, now seen corresponding path program 1 times [2020-10-28 18:51:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:34,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771272389] [2020-10-28 18:51:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:36,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:39,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:51:39,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,671 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:39,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:39,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:39,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:39,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771272389] [2020-10-28 18:51:39,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:39,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:39,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692970233] [2020-10-28 18:51:39,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:39,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:39,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:39,702 INFO L87 Difference]: Start difference. First operand 1947 states and 2758 transitions. Second operand 6 states. [2020-10-28 18:51:39,951 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:51:40,691 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:41,393 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:51:41,622 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:51:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:41,750 INFO L93 Difference]: Finished difference Result 4330 states and 6173 transitions. [2020-10-28 18:51:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:51:41,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 18:51:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:41,768 INFO L225 Difference]: With dead ends: 4330 [2020-10-28 18:51:41,769 INFO L226 Difference]: Without dead ends: 3615 [2020-10-28 18:51:41,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2020-10-28 18:51:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 2333. [2020-10-28 18:51:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2333 states. [2020-10-28 18:51:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3321 transitions. [2020-10-28 18:51:42,097 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3321 transitions. Word has length 60 [2020-10-28 18:51:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:42,097 INFO L481 AbstractCegarLoop]: Abstraction has 2333 states and 3321 transitions. [2020-10-28 18:51:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3321 transitions. [2020-10-28 18:51:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:51:42,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:42,100 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] [2020-10-28 18:51:42,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:51:42,100 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1286147210, now seen corresponding path program 1 times [2020-10-28 18:51:42,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:42,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466289937] [2020-10-28 18:51:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:42,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:43,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:47,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:51:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:51:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:47,417 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:47,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:47,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:47,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:47,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:51:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:47,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:51:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:51:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466289937] [2020-10-28 18:51:47,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:47,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:51:47,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236934420] [2020-10-28 18:51:47,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:47,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:47,484 INFO L87 Difference]: Start difference. First operand 2333 states and 3321 transitions. Second operand 6 states. [2020-10-28 18:51:47,744 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:51:48,642 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:51:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:49,046 INFO L93 Difference]: Finished difference Result 5186 states and 7425 transitions. [2020-10-28 18:51:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:51:49,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:51:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:49,055 INFO L225 Difference]: With dead ends: 5186 [2020-10-28 18:51:49,055 INFO L226 Difference]: Without dead ends: 3018 [2020-10-28 18:51:49,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:51:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-10-28 18:51:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3002. [2020-10-28 18:51:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3002 states. [2020-10-28 18:51:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4250 transitions. [2020-10-28 18:51:49,435 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4250 transitions. Word has length 64 [2020-10-28 18:51:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:51:49,436 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 4250 transitions. [2020-10-28 18:51:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:51:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4250 transitions. [2020-10-28 18:51:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:51:49,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:51:49,439 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] [2020-10-28 18:51:49,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:51:49,439 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:51:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:51:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 884572129, now seen corresponding path program 1 times [2020-10-28 18:51:49,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:51:49,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969686247] [2020-10-28 18:51:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:51:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:49,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:50,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:51,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:54,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:51:54,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:51:54,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:51:54,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:54,713 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:51:54,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:51:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:51:54,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:51:54,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:51:54,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:51:54,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:51:54,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:51:54,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:51:54,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:51:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:51:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:51:54,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:51:54,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:51:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:51:54,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969686247] [2020-10-28 18:51:54,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:51:54,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:51:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050402436] [2020-10-28 18:51:54,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:51:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:51:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:51:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:51:54,745 INFO L87 Difference]: Start difference. First operand 3002 states and 4250 transitions. Second operand 6 states. [2020-10-28 18:51:54,980 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:51:56,506 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:51:56,863 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:51:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:51:59,444 INFO L93 Difference]: Finished difference Result 20699 states and 29916 transitions. [2020-10-28 18:51:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:51:59,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:51:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:51:59,488 INFO L225 Difference]: With dead ends: 20699 [2020-10-28 18:51:59,488 INFO L226 Difference]: Without dead ends: 18193 [2020-10-28 18:51:59,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:51:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18193 states. [2020-10-28 18:52:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18193 to 9833. [2020-10-28 18:52:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9833 states. [2020-10-28 18:52:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 14121 transitions. [2020-10-28 18:52:00,812 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 14121 transitions. Word has length 65 [2020-10-28 18:52:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 9833 states and 14121 transitions. [2020-10-28 18:52:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 14121 transitions. [2020-10-28 18:52:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:52:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:00,818 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] [2020-10-28 18:52:00,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:52:00,818 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash -967181341, now seen corresponding path program 1 times [2020-10-28 18:52:00,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:00,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664833216] [2020-10-28 18:52:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:05,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:05,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:52:05,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:52:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:52:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:06,075 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:06,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:06,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:06,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:06,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:06,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:52:06,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:06,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:52:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:52:06,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:52:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664833216] [2020-10-28 18:52:06,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:06,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:52:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827882586] [2020-10-28 18:52:06,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:06,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:06,112 INFO L87 Difference]: Start difference. First operand 9833 states and 14121 transitions. Second operand 6 states. [2020-10-28 18:52:06,322 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:52:07,978 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:52:08,392 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:52:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:15,195 INFO L93 Difference]: Finished difference Result 71107 states and 102022 transitions. [2020-10-28 18:52:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:52:15,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:52:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:15,338 INFO L225 Difference]: With dead ends: 71107 [2020-10-28 18:52:15,338 INFO L226 Difference]: Without dead ends: 61883 [2020-10-28 18:52:15,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61883 states. [2020-10-28 18:52:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61883 to 35501. [2020-10-28 18:52:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35501 states. [2020-10-28 18:52:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35501 states to 35501 states and 50649 transitions. [2020-10-28 18:52:20,128 INFO L78 Accepts]: Start accepts. Automaton has 35501 states and 50649 transitions. Word has length 65 [2020-10-28 18:52:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:20,129 INFO L481 AbstractCegarLoop]: Abstraction has 35501 states and 50649 transitions. [2020-10-28 18:52:20,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35501 states and 50649 transitions. [2020-10-28 18:52:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:52:20,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:20,142 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] [2020-10-28 18:52:20,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:52:20,142 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1993214981, now seen corresponding path program 1 times [2020-10-28 18:52:20,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:20,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537324312] [2020-10-28 18:52:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:20,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:20,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:22,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:25,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:52:25,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,417 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:25,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:25,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537324312] [2020-10-28 18:52:25,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:25,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997021415] [2020-10-28 18:52:25,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:25,458 INFO L87 Difference]: Start difference. First operand 35501 states and 50649 transitions. Second operand 6 states. [2020-10-28 18:52:25,711 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:52:26,861 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:29,387 INFO L93 Difference]: Finished difference Result 53629 states and 76606 transitions. [2020-10-28 18:52:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:29,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 18:52:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:29,435 INFO L225 Difference]: With dead ends: 53629 [2020-10-28 18:52:29,435 INFO L226 Difference]: Without dead ends: 25958 [2020-10-28 18:52:29,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25958 states. [2020-10-28 18:52:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25958 to 25859. [2020-10-28 18:52:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25859 states. [2020-10-28 18:52:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25859 states to 25859 states and 36706 transitions. [2020-10-28 18:52:32,721 INFO L78 Accepts]: Start accepts. Automaton has 25859 states and 36706 transitions. Word has length 66 [2020-10-28 18:52:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:32,721 INFO L481 AbstractCegarLoop]: Abstraction has 25859 states and 36706 transitions. [2020-10-28 18:52:32,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25859 states and 36706 transitions. [2020-10-28 18:52:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:52:32,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:32,733 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] [2020-10-28 18:52:32,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:52:32,734 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1396531320, now seen corresponding path program 1 times [2020-10-28 18:52:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054634273] [2020-10-28 18:52:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:32,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:52:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:38,000 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:38,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:38,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:38,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:38,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:38,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:52:38,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:38,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:38,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:38,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:38,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054634273] [2020-10-28 18:52:38,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:38,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:52:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9714102] [2020-10-28 18:52:38,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:52:38,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:52:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:52:38,050 INFO L87 Difference]: Start difference. First operand 25859 states and 36706 transitions. Second operand 6 states. [2020-10-28 18:52:38,291 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:52:39,214 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:52:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:52:41,296 INFO L93 Difference]: Finished difference Result 39206 states and 55881 transitions. [2020-10-28 18:52:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:52:41,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-28 18:52:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:52:41,327 INFO L225 Difference]: With dead ends: 39206 [2020-10-28 18:52:41,328 INFO L226 Difference]: Without dead ends: 18803 [2020-10-28 18:52:41,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:52:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18803 states. [2020-10-28 18:52:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18803 to 18746. [2020-10-28 18:52:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18746 states. [2020-10-28 18:52:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18746 states to 18746 states and 26602 transitions. [2020-10-28 18:52:43,625 INFO L78 Accepts]: Start accepts. Automaton has 18746 states and 26602 transitions. Word has length 66 [2020-10-28 18:52:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:52:43,625 INFO L481 AbstractCegarLoop]: Abstraction has 18746 states and 26602 transitions. [2020-10-28 18:52:43,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:52:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 18746 states and 26602 transitions. [2020-10-28 18:52:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:52:43,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:52:43,630 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] [2020-10-28 18:52:43,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:52:43,631 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:52:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:52:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1732566522, now seen corresponding path program 1 times [2020-10-28 18:52:43,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:52:43,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824983981] [2020-10-28 18:52:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:52:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:43,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:45,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:48,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:48,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:52:48,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:52:48,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:49,134 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:52:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:52:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:52:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:52:49,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:52:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:52:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:52:49,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824983981] [2020-10-28 18:52:49,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:52:49,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:52:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133581991] [2020-10-28 18:52:49,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:52:49,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:52:49,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:52:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:52:49,179 INFO L87 Difference]: Start difference. First operand 18746 states and 26602 transitions. Second operand 13 states. [2020-10-28 18:52:49,816 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-28 18:52:53,007 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:52:57,044 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 158 [2020-10-28 18:52:57,566 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 18:53:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:11,623 INFO L93 Difference]: Finished difference Result 130127 states and 180126 transitions. [2020-10-28 18:53:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 18:53:11,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 18:53:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:11,920 INFO L225 Difference]: With dead ends: 130127 [2020-10-28 18:53:11,920 INFO L226 Difference]: Without dead ends: 115047 [2020-10-28 18:53:11,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=737, Invalid=2803, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 18:53:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115047 states. [2020-10-28 18:53:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115047 to 30154. [2020-10-28 18:53:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30154 states. [2020-10-28 18:53:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30154 states to 30154 states and 43043 transitions. [2020-10-28 18:53:17,321 INFO L78 Accepts]: Start accepts. Automaton has 30154 states and 43043 transitions. Word has length 67 [2020-10-28 18:53:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:53:17,322 INFO L481 AbstractCegarLoop]: Abstraction has 30154 states and 43043 transitions. [2020-10-28 18:53:17,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:53:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 30154 states and 43043 transitions. [2020-10-28 18:53:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:53:17,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:53:17,327 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] [2020-10-28 18:53:17,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:53:17,327 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:53:17,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:53:17,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2072029558, now seen corresponding path program 1 times [2020-10-28 18:53:17,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:53:17,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365883] [2020-10-28 18:53:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:53:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:17,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:22,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:53:22,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:53:22,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:53:22,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:22,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:22,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:53:22,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:53:22,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:53:22,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:22,873 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:53:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:53:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:53:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:53:22,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:53:22,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:53:22,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:53:22,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:53:22,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:53:22,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:53:22,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:53:22,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:53:22,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:53:22,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:53:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:53:22,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365883] [2020-10-28 18:53:22,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:53:22,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:53:22,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280824056] [2020-10-28 18:53:22,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:53:22,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:53:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:53:22,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:53:22,908 INFO L87 Difference]: Start difference. First operand 30154 states and 43043 transitions. Second operand 13 states. [2020-10-28 18:53:23,533 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 158 [2020-10-28 18:53:27,233 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 161 [2020-10-28 18:53:27,768 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:53:31,352 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:53:31,953 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 157 [2020-10-28 18:53:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:53:56,440 INFO L93 Difference]: Finished difference Result 175445 states and 243101 transitions. [2020-10-28 18:53:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 18:53:56,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 18:53:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:53:56,857 INFO L225 Difference]: With dead ends: 175445 [2020-10-28 18:53:56,857 INFO L226 Difference]: Without dead ends: 157367 [2020-10-28 18:53:56,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 18:53:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157367 states. [2020-10-28 18:54:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157367 to 30132. [2020-10-28 18:54:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30132 states. [2020-10-28 18:54:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30132 states to 30132 states and 43009 transitions. [2020-10-28 18:54:03,089 INFO L78 Accepts]: Start accepts. Automaton has 30132 states and 43009 transitions. Word has length 67 [2020-10-28 18:54:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:03,089 INFO L481 AbstractCegarLoop]: Abstraction has 30132 states and 43009 transitions. [2020-10-28 18:54:03,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:54:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30132 states and 43009 transitions. [2020-10-28 18:54:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:03,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:03,092 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] [2020-10-28 18:54:03,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:54:03,092 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 710647304, now seen corresponding path program 1 times [2020-10-28 18:54:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:03,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732472766] [2020-10-28 18:54:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:04,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:06,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking...