/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:12:30,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:12:30,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:12:30,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:12:30,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:12:30,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:12:30,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:12:30,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:12:30,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:12:30,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:12:30,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:12:30,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:12:30,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:12:30,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:12:30,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:12:30,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:12:30,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:12:30,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:12:30,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:12:30,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:12:30,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:12:30,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:12:30,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:12:30,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:12:30,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:12:30,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:12:30,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:12:30,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:12:30,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:12:30,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:12:30,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:12:30,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:12:30,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:12:30,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:12:30,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:12:30,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:12:30,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:12:30,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:12:30,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:12:30,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:12:30,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:12:30,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:12:30,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:12:30,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:12:30,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:12:30,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:12:30,719 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:12:30,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:12:30,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:12:30,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:12:30,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:12:30,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:12:30,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:12:30,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:12:30,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:12:30,722 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:12:30,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:12:30,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:12:30,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:12:30,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:12:30,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:12:30,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:12:30,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:12:30,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:30,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:12:30,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:12:30,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:12:30,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:12:30,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:12:30,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:12:30,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:12:30,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:12:31,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:12:31,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:12:31,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:12:31,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:12:31,174 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:12:31,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:12:31,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19c3fca20/02a82a79679d423db4988f5d3b38688f/FLAGf74e6f154 [2020-10-29 13:12:31,798 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:12:31,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:12:31,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19c3fca20/02a82a79679d423db4988f5d3b38688f/FLAGf74e6f154 [2020-10-29 13:12:32,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19c3fca20/02a82a79679d423db4988f5d3b38688f [2020-10-29 13:12:32,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:12:32,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:12:32,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:32,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:12:32,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:12:32,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf944b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32, skipping insertion in model container [2020-10-29 13:12:32,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:12:32,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:12:32,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:32,531 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:12:32,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:12:32,696 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:12:32,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32 WrapperNode [2020-10-29 13:12:32,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:12:32,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:12:32,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:12:32,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:12:32,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... [2020-10-29 13:12:32,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:12:32,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:12:32,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:12:32,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:12:32,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:12:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:12:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:12:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:12:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:12:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:12:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:12:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:12:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:12:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:12:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:12:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:12:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:12:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:12:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:12:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:12:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:12:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:12:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:12:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:12:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:12:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:12:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:12:33,540 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:12:33,540 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:12:33,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:33 BoogieIcfgContainer [2020-10-29 13:12:33,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:12:33,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:12:33,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:12:33,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:12:33,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:12:32" (1/3) ... [2020-10-29 13:12:33,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea17084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:33, skipping insertion in model container [2020-10-29 13:12:33,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:12:32" (2/3) ... [2020-10-29 13:12:33,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea17084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:12:33, skipping insertion in model container [2020-10-29 13:12:33,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:12:33" (3/3) ... [2020-10-29 13:12:33,552 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:12:33,565 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:12:33,570 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:12:33,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:12:33,629 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:12:33,630 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:12:33,630 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:12:33,630 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:12:33,630 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:12:33,630 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:12:33,630 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:12:33,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:12:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-29 13:12:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 13:12:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:33,669 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] [2020-10-29 13:12:33,669 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash 238077610, now seen corresponding path program 1 times [2020-10-29 13:12:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:33,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503361637] [2020-10-29 13:12:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:35,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 13:12:35,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:12:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1578 [2020-10-29 13:12:35,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:35,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:12:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:12:36,073 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:36,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:36,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:36,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:36,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:36,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:12:36,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:36,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:36,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:36,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:12:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:36,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503361637] [2020-10-29 13:12:36,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:36,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:36,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128228289] [2020-10-29 13:12:36,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:36,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:36,182 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 6 states. [2020-10-29 13:12:36,573 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:12:37,418 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:12:37,724 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:12:38,052 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:12:38,334 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:12:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:38,383 INFO L93 Difference]: Finished difference Result 347 states and 540 transitions. [2020-10-29 13:12:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:12:38,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-29 13:12:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:38,400 INFO L225 Difference]: With dead ends: 347 [2020-10-29 13:12:38,401 INFO L226 Difference]: Without dead ends: 281 [2020-10-29 13:12:38,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:12:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-29 13:12:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 106. [2020-10-29 13:12:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 13:12:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 153 transitions. [2020-10-29 13:12:38,473 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 153 transitions. Word has length 42 [2020-10-29 13:12:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:38,474 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 153 transitions. [2020-10-29 13:12:38,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 153 transitions. [2020-10-29 13:12:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:12:38,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:38,477 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] [2020-10-29 13:12:38,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:12:38,478 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash -533542023, now seen corresponding path program 1 times [2020-10-29 13:12:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:38,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120845261] [2020-10-29 13:12:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:41,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:12:41,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:12:41,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2899 [2020-10-29 13:12:41,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:41,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:12:41,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 13:12:41,733 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:41,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:41,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:41,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:41,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:12:41,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:41,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:41,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:41,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120845261] [2020-10-29 13:12:41,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:41,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:41,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353061110] [2020-10-29 13:12:41,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:41,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:41,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:41,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:41,803 INFO L87 Difference]: Start difference. First operand 106 states and 153 transitions. Second operand 6 states. [2020-10-29 13:12:42,131 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:12:42,752 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:12:43,075 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:12:43,349 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:12:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:43,414 INFO L93 Difference]: Finished difference Result 433 states and 661 transitions. [2020-10-29 13:12:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:12:43,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-29 13:12:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:43,418 INFO L225 Difference]: With dead ends: 433 [2020-10-29 13:12:43,418 INFO L226 Difference]: Without dead ends: 350 [2020-10-29 13:12:43,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:12:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-29 13:12:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 222. [2020-10-29 13:12:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-29 13:12:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 336 transitions. [2020-10-29 13:12:43,450 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 336 transitions. Word has length 44 [2020-10-29 13:12:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:43,451 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 336 transitions. [2020-10-29 13:12:43,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 336 transitions. [2020-10-29 13:12:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:12:43,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:43,453 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] [2020-10-29 13:12:43,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:12:43,454 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash -763454641, now seen corresponding path program 1 times [2020-10-29 13:12:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36469706] [2020-10-29 13:12:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:43,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:43,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:12:44,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:12:44,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-29 13:12:44,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:44,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:12:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:12:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:12:44,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:44,463 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:44,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:44,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:44,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:44,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:44,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:12:44,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:44,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:44,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:44,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36469706] [2020-10-29 13:12:44,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:44,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:12:44,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298377097] [2020-10-29 13:12:44,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:12:44,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:44,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:12:44,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:12:44,498 INFO L87 Difference]: Start difference. First operand 222 states and 336 transitions. Second operand 4 states. [2020-10-29 13:12:44,759 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:12:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:45,111 INFO L93 Difference]: Finished difference Result 594 states and 917 transitions. [2020-10-29 13:12:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:12:45,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:12:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:45,115 INFO L225 Difference]: With dead ends: 594 [2020-10-29 13:12:45,115 INFO L226 Difference]: Without dead ends: 395 [2020-10-29 13:12:45,120 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 [2020-10-29 13:12:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-29 13:12:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-10-29 13:12:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-29 13:12:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 586 transitions. [2020-10-29 13:12:45,174 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 586 transitions. Word has length 44 [2020-10-29 13:12:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:45,175 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 586 transitions. [2020-10-29 13:12:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:12:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 586 transitions. [2020-10-29 13:12:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:12:45,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:45,189 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] [2020-10-29 13:12:45,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:12:45,189 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -141925008, now seen corresponding path program 1 times [2020-10-29 13:12:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:45,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132909560] [2020-10-29 13:12:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:45,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:45,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:12:45,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:12:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-29 13:12:45,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:45,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:12:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:12:46,208 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:46,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:46,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:46,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:46,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:12:46,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:46,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:46,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:46,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132909560] [2020-10-29 13:12:46,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:46,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250355724] [2020-10-29 13:12:46,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:46,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:46,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:46,243 INFO L87 Difference]: Start difference. First operand 387 states and 586 transitions. Second operand 6 states. [2020-10-29 13:12:46,600 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-29 13:12:47,241 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:12:47,591 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:12:47,900 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-29 13:12:48,174 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:12:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:48,231 INFO L93 Difference]: Finished difference Result 882 states and 1343 transitions. [2020-10-29 13:12:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:12:48,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-29 13:12:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:48,235 INFO L225 Difference]: With dead ends: 882 [2020-10-29 13:12:48,235 INFO L226 Difference]: Without dead ends: 518 [2020-10-29 13:12:48,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:12:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-29 13:12:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 387. [2020-10-29 13:12:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-29 13:12:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 582 transitions. [2020-10-29 13:12:48,272 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 582 transitions. Word has length 44 [2020-10-29 13:12:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:48,272 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 582 transitions. [2020-10-29 13:12:48,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 582 transitions. [2020-10-29 13:12:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:12:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:48,274 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] [2020-10-29 13:12:48,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:12:48,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1269643905, now seen corresponding path program 1 times [2020-10-29 13:12:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162571079] [2020-10-29 13:12:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:48,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:48,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:50,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:50,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:12:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:12:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-29 13:12:50,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:50,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:12:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:12:50,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:50,475 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:50,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:50,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:50,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:50,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:50,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162571079] [2020-10-29 13:12:50,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:50,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:12:50,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470024310] [2020-10-29 13:12:50,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:12:50,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:12:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:12:50,531 INFO L87 Difference]: Start difference. First operand 387 states and 582 transitions. Second operand 6 states. [2020-10-29 13:12:50,851 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:12:51,572 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:12:51,828 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:12:52,099 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:12:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:52,264 INFO L93 Difference]: Finished difference Result 1041 states and 1576 transitions. [2020-10-29 13:12:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:12:52,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-29 13:12:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:52,273 INFO L225 Difference]: With dead ends: 1041 [2020-10-29 13:12:52,273 INFO L226 Difference]: Without dead ends: 824 [2020-10-29 13:12:52,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:12:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2020-10-29 13:12:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 608. [2020-10-29 13:12:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-29 13:12:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 920 transitions. [2020-10-29 13:12:52,320 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 920 transitions. Word has length 44 [2020-10-29 13:12:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:52,321 INFO L481 AbstractCegarLoop]: Abstraction has 608 states and 920 transitions. [2020-10-29 13:12:52,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:12:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 920 transitions. [2020-10-29 13:12:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:12:52,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:52,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:12:52,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:12:52,322 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1910575989, now seen corresponding path program 1 times [2020-10-29 13:12:52,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:52,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031541096] [2020-10-29 13:12:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:52,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:52,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:53,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:53,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:12:53,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:12:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:12:53,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:53,999 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:12:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:54,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:54,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:54,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:54,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:54,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:12:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031541096] [2020-10-29 13:12:54,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:54,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:12:54,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346376312] [2020-10-29 13:12:54,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:12:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:12:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:12:54,032 INFO L87 Difference]: Start difference. First operand 608 states and 920 transitions. Second operand 5 states. [2020-10-29 13:12:54,352 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:12:55,063 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:12:55,357 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:12:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:55,498 INFO L93 Difference]: Finished difference Result 1247 states and 1912 transitions. [2020-10-29 13:12:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:12:55,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-29 13:12:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:55,504 INFO L225 Difference]: With dead ends: 1247 [2020-10-29 13:12:55,505 INFO L226 Difference]: Without dead ends: 928 [2020-10-29 13:12:55,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:12:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-10-29 13:12:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 914. [2020-10-29 13:12:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2020-10-29 13:12:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1382 transitions. [2020-10-29 13:12:55,568 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1382 transitions. Word has length 45 [2020-10-29 13:12:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:55,568 INFO L481 AbstractCegarLoop]: Abstraction has 914 states and 1382 transitions. [2020-10-29 13:12:55,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:12:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1382 transitions. [2020-10-29 13:12:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:12:55,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:55,570 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] [2020-10-29 13:12:55,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:12:55,570 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1553981397, now seen corresponding path program 1 times [2020-10-29 13:12:55,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:55,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345818170] [2020-10-29 13:12:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:55,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4807 [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:00,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:13:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:13:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:00,696 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:00,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:00,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:00,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:00,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:13:00,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:00,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:00,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:00,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:00,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:00,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:00,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345818170] [2020-10-29 13:13:00,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:00,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83078798] [2020-10-29 13:13:00,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:00,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:00,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:00,722 INFO L87 Difference]: Start difference. First operand 914 states and 1382 transitions. Second operand 6 states. [2020-10-29 13:13:01,052 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:13:01,810 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:13:02,082 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:13:02,341 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:13:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:02,537 INFO L93 Difference]: Finished difference Result 1655 states and 2505 transitions. [2020-10-29 13:13:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:02,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 13:13:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:02,548 INFO L225 Difference]: With dead ends: 1655 [2020-10-29 13:13:02,548 INFO L226 Difference]: Without dead ends: 1438 [2020-10-29 13:13:02,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2020-10-29 13:13:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1062. [2020-10-29 13:13:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-10-29 13:13:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1609 transitions. [2020-10-29 13:13:02,645 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1609 transitions. Word has length 45 [2020-10-29 13:13:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:02,646 INFO L481 AbstractCegarLoop]: Abstraction has 1062 states and 1609 transitions. [2020-10-29 13:13:02,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1609 transitions. [2020-10-29 13:13:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:13:02,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:02,648 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] [2020-10-29 13:13:02,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:13:02,649 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -164011386, now seen corresponding path program 1 times [2020-10-29 13:13:02,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695632919] [2020-10-29 13:13:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:02,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:02,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:02,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:13:02,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:13:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-29 13:13:02,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:02,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:13:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:13:02,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:03,242 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:03,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:03,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:03,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:03,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:03,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:13:03,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:03,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:03,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:03,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:03,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695632919] [2020-10-29 13:13:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:03,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:13:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105142518] [2020-10-29 13:13:03,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:13:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:03,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:13:03,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:13:03,273 INFO L87 Difference]: Start difference. First operand 1062 states and 1609 transitions. Second operand 4 states. [2020-10-29 13:13:03,534 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:13:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:04,036 INFO L93 Difference]: Finished difference Result 2916 states and 4417 transitions. [2020-10-29 13:13:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:13:04,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:13:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:04,048 INFO L225 Difference]: With dead ends: 2916 [2020-10-29 13:13:04,049 INFO L226 Difference]: Without dead ends: 1877 [2020-10-29 13:13:04,052 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 [2020-10-29 13:13:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2020-10-29 13:13:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1874. [2020-10-29 13:13:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2020-10-29 13:13:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2801 transitions. [2020-10-29 13:13:04,220 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2801 transitions. Word has length 45 [2020-10-29 13:13:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:04,220 INFO L481 AbstractCegarLoop]: Abstraction has 1874 states and 2801 transitions. [2020-10-29 13:13:04,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:13:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2801 transitions. [2020-10-29 13:13:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:13:04,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:04,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:04,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:13:04,221 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2004229664, now seen corresponding path program 1 times [2020-10-29 13:13:04,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:04,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227500669] [2020-10-29 13:13:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:04,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:04,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:04,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:04,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:13:04,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:13:04,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-29 13:13:04,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:04,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:13:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:05,046 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:05,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:05,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:05,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:05,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:05,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:13:05,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:05,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:05,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:05,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227500669] [2020-10-29 13:13:05,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:05,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:05,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565242258] [2020-10-29 13:13:05,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:05,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:05,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:05,088 INFO L87 Difference]: Start difference. First operand 1874 states and 2801 transitions. Second operand 6 states. [2020-10-29 13:13:05,383 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:05,873 INFO L93 Difference]: Finished difference Result 3725 states and 5579 transitions. [2020-10-29 13:13:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:13:05,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:13:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:05,883 INFO L225 Difference]: With dead ends: 3725 [2020-10-29 13:13:05,883 INFO L226 Difference]: Without dead ends: 1874 [2020-10-29 13:13:05,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-10-29 13:13:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1874. [2020-10-29 13:13:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2020-10-29 13:13:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2773 transitions. [2020-10-29 13:13:06,040 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2773 transitions. Word has length 46 [2020-10-29 13:13:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:06,040 INFO L481 AbstractCegarLoop]: Abstraction has 1874 states and 2773 transitions. [2020-10-29 13:13:06,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2773 transitions. [2020-10-29 13:13:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:13:06,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:06,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:06,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:13:06,042 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1425205243, now seen corresponding path program 1 times [2020-10-29 13:13:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:06,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366329215] [2020-10-29 13:13:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:06,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:06,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:13:06,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:13:06,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 13:13:06,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:06,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:06,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:13:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 13:13:06,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:06,537 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:06,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:06,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:06,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:06,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:06,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:06,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:13:06,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:06,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:06,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:06,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:06,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366329215] [2020-10-29 13:13:06,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:06,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:13:06,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921540237] [2020-10-29 13:13:06,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:13:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:06,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:13:06,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:13:06,570 INFO L87 Difference]: Start difference. First operand 1874 states and 2773 transitions. Second operand 4 states. [2020-10-29 13:13:06,839 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:13:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:07,400 INFO L93 Difference]: Finished difference Result 5128 states and 7545 transitions. [2020-10-29 13:13:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:13:07,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-29 13:13:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:07,418 INFO L225 Difference]: With dead ends: 5128 [2020-10-29 13:13:07,418 INFO L226 Difference]: Without dead ends: 3277 [2020-10-29 13:13:07,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2020-10-29 13:13:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 3274. [2020-10-29 13:13:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3274 states. [2020-10-29 13:13:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 4737 transitions. [2020-10-29 13:13:07,688 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 4737 transitions. Word has length 46 [2020-10-29 13:13:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:07,689 INFO L481 AbstractCegarLoop]: Abstraction has 3274 states and 4737 transitions. [2020-10-29 13:13:07,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:13:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 4737 transitions. [2020-10-29 13:13:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:13:07,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:07,690 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] [2020-10-29 13:13:07,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:13:07,690 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:07,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1562756634, now seen corresponding path program 1 times [2020-10-29 13:13:07,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:07,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329553632] [2020-10-29 13:13:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:07,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:07,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:08,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:13:08,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:13:08,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-29 13:13:08,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:08,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:13:08,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:08,338 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:08,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:08,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:08,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:08,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329553632] [2020-10-29 13:13:08,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:08,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425025002] [2020-10-29 13:13:08,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:08,399 INFO L87 Difference]: Start difference. First operand 3274 states and 4737 transitions. Second operand 6 states. [2020-10-29 13:13:08,708 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:13:09,362 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:13:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:09,894 INFO L93 Difference]: Finished difference Result 9720 states and 14053 transitions. [2020-10-29 13:13:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:09,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-29 13:13:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:09,924 INFO L225 Difference]: With dead ends: 9720 [2020-10-29 13:13:09,924 INFO L226 Difference]: Without dead ends: 6469 [2020-10-29 13:13:09,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2020-10-29 13:13:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6466. [2020-10-29 13:13:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6466 states. [2020-10-29 13:13:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6466 states to 6466 states and 9281 transitions. [2020-10-29 13:13:10,473 INFO L78 Accepts]: Start accepts. Automaton has 6466 states and 9281 transitions. Word has length 47 [2020-10-29 13:13:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:10,473 INFO L481 AbstractCegarLoop]: Abstraction has 6466 states and 9281 transitions. [2020-10-29 13:13:10,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6466 states and 9281 transitions. [2020-10-29 13:13:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:13:10,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:10,474 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] [2020-10-29 13:13:10,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:13:10,475 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1960347009, now seen corresponding path program 1 times [2020-10-29 13:13:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:10,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482009097] [2020-10-29 13:13:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:13:10,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 13:13:10,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:13:10,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:10,980 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:10,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:11,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:11,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:13:11,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:11,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:11,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:11,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482009097] [2020-10-29 13:13:11,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:11,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:11,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129285350] [2020-10-29 13:13:11,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:13:11,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:11,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:13:11,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:11,016 INFO L87 Difference]: Start difference. First operand 6466 states and 9281 transitions. Second operand 5 states. [2020-10-29 13:13:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:12,287 INFO L93 Difference]: Finished difference Result 9677 states and 13855 transitions. [2020-10-29 13:13:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:13:12,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-29 13:13:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:12,341 INFO L225 Difference]: With dead ends: 9677 [2020-10-29 13:13:12,341 INFO L226 Difference]: Without dead ends: 9674 [2020-10-29 13:13:12,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9674 states. [2020-10-29 13:13:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9674 to 6610. [2020-10-29 13:13:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6610 states. [2020-10-29 13:13:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 9353 transitions. [2020-10-29 13:13:13,001 INFO L78 Accepts]: Start accepts. Automaton has 6610 states and 9353 transitions. Word has length 47 [2020-10-29 13:13:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:13,001 INFO L481 AbstractCegarLoop]: Abstraction has 6610 states and 9353 transitions. [2020-10-29 13:13:13,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:13:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6610 states and 9353 transitions. [2020-10-29 13:13:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 13:13:13,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:13,002 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] [2020-10-29 13:13:13,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:13:13,003 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1579050152, now seen corresponding path program 1 times [2020-10-29 13:13:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:13,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585811908] [2020-10-29 13:13:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:13,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:13,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 13:13:13,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:13:13,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-29 13:13:13,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:13,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:13,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:13:13,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:13,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:13:13,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:13,880 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:13,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:13,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:13,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:13,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585811908] [2020-10-29 13:13:13,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:13,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:13,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585600324] [2020-10-29 13:13:13,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:13:13,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:13:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:13:13,931 INFO L87 Difference]: Start difference. First operand 6610 states and 9353 transitions. Second operand 7 states. [2020-10-29 13:13:14,235 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:13:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:15,805 INFO L93 Difference]: Finished difference Result 16446 states and 23028 transitions. [2020-10-29 13:13:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:13:15,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-29 13:13:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:15,836 INFO L225 Difference]: With dead ends: 16446 [2020-10-29 13:13:15,836 INFO L226 Difference]: Without dead ends: 11785 [2020-10-29 13:13:15,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11785 states. [2020-10-29 13:13:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11785 to 6617. [2020-10-29 13:13:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6617 states. [2020-10-29 13:13:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 9362 transitions. [2020-10-29 13:13:16,445 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 9362 transitions. Word has length 49 [2020-10-29 13:13:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:16,445 INFO L481 AbstractCegarLoop]: Abstraction has 6617 states and 9362 transitions. [2020-10-29 13:13:16,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:13:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 9362 transitions. [2020-10-29 13:13:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:13:16,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:16,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:16,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:13:16,449 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1088770021, now seen corresponding path program 1 times [2020-10-29 13:13:16,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:16,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857440725] [2020-10-29 13:13:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:20,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:13:20,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:13:20,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4391 [2020-10-29 13:13:20,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:20,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:13:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:13:20,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:21,186 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 23 [2020-10-29 13:13:21,488 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:21,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:21,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:21,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:21,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:21,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:13:21,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:21,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:21,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:21,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:21,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:21,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:21,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857440725] [2020-10-29 13:13:21,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:13:21,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:13:21,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262443852] [2020-10-29 13:13:21,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:13:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:13:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:21,524 INFO L87 Difference]: Start difference. First operand 6617 states and 9362 transitions. Second operand 9 states. [2020-10-29 13:13:21,880 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-29 13:13:24,023 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-29 13:13:24,314 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:24,664 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-29 13:13:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:28,786 INFO L93 Difference]: Finished difference Result 48332 states and 66977 transitions. [2020-10-29 13:13:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 13:13:28,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-29 13:13:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:28,883 INFO L225 Difference]: With dead ends: 48332 [2020-10-29 13:13:28,884 INFO L226 Difference]: Without dead ends: 41745 [2020-10-29 13:13:28,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:13:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41745 states. [2020-10-29 13:13:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41745 to 20705. [2020-10-29 13:13:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20705 states. [2020-10-29 13:13:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20705 states to 20705 states and 28790 transitions. [2020-10-29 13:13:31,551 INFO L78 Accepts]: Start accepts. Automaton has 20705 states and 28790 transitions. Word has length 68 [2020-10-29 13:13:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:31,551 INFO L481 AbstractCegarLoop]: Abstraction has 20705 states and 28790 transitions. [2020-10-29 13:13:31,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:13:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20705 states and 28790 transitions. [2020-10-29 13:13:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:13:31,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:31,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:31,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:13:31,556 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash -204691798, now seen corresponding path program 1 times [2020-10-29 13:13:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:31,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678399607] [2020-10-29 13:13:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:31,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:35,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:13:35,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:13:35,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3925 [2020-10-29 13:13:35,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:35,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:13:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:13:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:13:35,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:36,096 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:36,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:36,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:36,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678399607] [2020-10-29 13:13:36,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:13:36,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:13:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532734718] [2020-10-29 13:13:36,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:13:36,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:13:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:13:36,141 INFO L87 Difference]: Start difference. First operand 20705 states and 28790 transitions. Second operand 10 states. [2020-10-29 13:13:36,493 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:39,138 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:13:39,498 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:13:39,980 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:13:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:45,388 INFO L93 Difference]: Finished difference Result 54906 states and 76578 transitions. [2020-10-29 13:13:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 13:13:45,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-29 13:13:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:45,482 INFO L225 Difference]: With dead ends: 54906 [2020-10-29 13:13:45,482 INFO L226 Difference]: Without dead ends: 43926 [2020-10-29 13:13:45,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-10-29 13:13:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43926 states. [2020-10-29 13:13:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43926 to 22621. [2020-10-29 13:13:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22621 states. [2020-10-29 13:13:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22621 states to 22621 states and 31626 transitions. [2020-10-29 13:13:48,698 INFO L78 Accepts]: Start accepts. Automaton has 22621 states and 31626 transitions. Word has length 68 [2020-10-29 13:13:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 22621 states and 31626 transitions. [2020-10-29 13:13:48,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:13:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22621 states and 31626 transitions. [2020-10-29 13:13:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:13:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:48,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:48,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:13:48,704 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1216855328, now seen corresponding path program 1 times [2020-10-29 13:13:48,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:48,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201900651] [2020-10-29 13:13:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:48,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:51,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:13:51,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:13:51,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3043 [2020-10-29 13:13:51,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:51,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:51,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:51,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:51,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:13:51,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:52,050 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:13:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:52,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:52,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:13:52,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:52,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 13:13:52,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201900651] [2020-10-29 13:13:52,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:52,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:52,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903351693] [2020-10-29 13:13:52,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:52,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:52,103 INFO L87 Difference]: Start difference. First operand 22621 states and 31626 transitions. Second operand 6 states. [2020-10-29 13:13:52,418 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:13:53,404 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-29 13:13:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:56,820 INFO L93 Difference]: Finished difference Result 49919 states and 69974 transitions. [2020-10-29 13:13:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:56,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-29 13:13:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:56,880 INFO L225 Difference]: With dead ends: 49919 [2020-10-29 13:13:56,880 INFO L226 Difference]: Without dead ends: 27328 [2020-10-29 13:13:56,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:13:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27328 states. [2020-10-29 13:14:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27328 to 27213. [2020-10-29 13:14:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27213 states. [2020-10-29 13:14:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 37674 transitions. [2020-10-29 13:14:00,377 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 37674 transitions. Word has length 68 [2020-10-29 13:14:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:00,377 INFO L481 AbstractCegarLoop]: Abstraction has 27213 states and 37674 transitions. [2020-10-29 13:14:00,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 37674 transitions. [2020-10-29 13:14:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:14:00,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:00,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:00,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:14:00,383 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1498930970, now seen corresponding path program 1 times [2020-10-29 13:14:00,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:00,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886316836] [2020-10-29 13:14:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:00,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:05,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:14:05,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:14:05,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:05,720 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:14:05,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:05,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:05,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:05,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:05,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:05,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:05,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:05,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886316836] [2020-10-29 13:14:05,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:14:05,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:14:05,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484727974] [2020-10-29 13:14:05,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:05,751 INFO L87 Difference]: Start difference. First operand 27213 states and 37674 transitions. Second operand 6 states. [2020-10-29 13:14:06,047 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-29 13:14:07,139 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-29 13:14:07,434 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:14:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:11,827 INFO L93 Difference]: Finished difference Result 51773 states and 72866 transitions. [2020-10-29 13:14:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:14:11,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:14:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:11,881 INFO L225 Difference]: With dead ends: 51773 [2020-10-29 13:14:11,881 INFO L226 Difference]: Without dead ends: 38836 [2020-10-29 13:14:11,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38836 states. [2020-10-29 13:14:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38836 to 38507. [2020-10-29 13:14:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38507 states. [2020-10-29 13:14:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38507 states to 38507 states and 53108 transitions. [2020-10-29 13:14:17,143 INFO L78 Accepts]: Start accepts. Automaton has 38507 states and 53108 transitions. Word has length 69 [2020-10-29 13:14:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:17,143 INFO L481 AbstractCegarLoop]: Abstraction has 38507 states and 53108 transitions. [2020-10-29 13:14:17,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38507 states and 53108 transitions. [2020-10-29 13:14:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:14:17,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:17,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:14:17,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:14:17,149 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 465606209, now seen corresponding path program 1 times [2020-10-29 13:14:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:17,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738608421] [2020-10-29 13:14:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:17,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:17,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:17,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:14:17,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:14:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:18,396 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:14:18,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:18,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:18,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:18,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:14:18,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:18,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:18,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:18,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:18,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-29 13:14:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:18,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738608421] [2020-10-29 13:14:18,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:14:18,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:14:18,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261134773] [2020-10-29 13:14:18,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:14:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:14:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:14:18,448 INFO L87 Difference]: Start difference. First operand 38507 states and 53108 transitions. Second operand 10 states. [2020-10-29 13:14:18,801 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:21,505 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:14:22,023 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:14:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:48,807 INFO L93 Difference]: Finished difference Result 205929 states and 281101 transitions. [2020-10-29 13:14:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:14:48,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-29 13:14:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:49,251 INFO L225 Difference]: With dead ends: 205929 [2020-10-29 13:14:49,251 INFO L226 Difference]: Without dead ends: 185706 [2020-10-29 13:14:49,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:14:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185706 states. [2020-10-29 13:15:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185706 to 96645. [2020-10-29 13:15:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96645 states. [2020-10-29 13:15:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96645 states to 96645 states and 133784 transitions. [2020-10-29 13:15:04,730 INFO L78 Accepts]: Start accepts. Automaton has 96645 states and 133784 transitions. Word has length 69 [2020-10-29 13:15:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:04,731 INFO L481 AbstractCegarLoop]: Abstraction has 96645 states and 133784 transitions. [2020-10-29 13:15:04,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:15:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 96645 states and 133784 transitions. [2020-10-29 13:15:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:15:04,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:04,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:04,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:15:04,738 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1741301447, now seen corresponding path program 1 times [2020-10-29 13:15:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:04,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513395929] [2020-10-29 13:15:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4846 [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:09,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:15:09,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:15:09,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:09,932 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:15:09,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:09,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:09,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:09,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:09,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513395929] [2020-10-29 13:15:09,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:15:09,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:15:09,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497025321] [2020-10-29 13:15:09,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:09,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:09,955 INFO L87 Difference]: Start difference. First operand 96645 states and 133784 transitions. Second operand 8 states. [2020-10-29 13:15:10,260 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-29 13:15:12,064 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:15:12,389 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-29 13:15:12,741 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-29 13:15:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:36,101 INFO L93 Difference]: Finished difference Result 246588 states and 341149 transitions. [2020-10-29 13:15:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:15:36,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:15:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:36,471 INFO L225 Difference]: With dead ends: 246588 [2020-10-29 13:15:36,471 INFO L226 Difference]: Without dead ends: 149973 [2020-10-29 13:15:36,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:15:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149973 states. [2020-10-29 13:15:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149973 to 89699. [2020-10-29 13:15:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89699 states. [2020-10-29 13:15:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89699 states to 89699 states and 122817 transitions. [2020-10-29 13:15:50,921 INFO L78 Accepts]: Start accepts. Automaton has 89699 states and 122817 transitions. Word has length 69 [2020-10-29 13:15:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:50,921 INFO L481 AbstractCegarLoop]: Abstraction has 89699 states and 122817 transitions. [2020-10-29 13:15:50,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 89699 states and 122817 transitions. [2020-10-29 13:15:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:15:50,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:50,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:50,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:15:50,925 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1339349141, now seen corresponding path program 1 times [2020-10-29 13:15:50,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:50,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757691716] [2020-10-29 13:15:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:55,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:15:55,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:15:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-29 13:15:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:55,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:15:55,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:56,176 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2020-10-29 13:15:56,532 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-29 13:15:56,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:56,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:56,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:15:56,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:56,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:56,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:56,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757691716] [2020-10-29 13:15:56,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:15:56,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:15:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129187529] [2020-10-29 13:15:56,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:56,563 INFO L87 Difference]: Start difference. First operand 89699 states and 122817 transitions. Second operand 9 states. [2020-10-29 13:15:56,952 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:15:59,456 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-29 13:15:59,847 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 125