/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=DEEPEST --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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:45:56,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:45:56,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:45:56,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:45:56,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:45:56,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:45:56,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:45:56,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:45:56,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:45:56,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:45:56,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:45:56,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:45:56,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:45:56,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:45:56,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:45:56,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:45:56,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:45:56,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:45:56,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:45:56,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:45:56,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:45:56,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:45:56,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:45:56,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:45:56,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:45:56,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:45:56,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:45:56,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:45:56,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:45:56,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:45:56,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:45:56,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:45:56,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:45:56,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:45:56,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:45:56,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:45:56,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:45:56,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:45:56,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:45:56,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:45:56,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:45:56,588 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 [2020-10-27 23:45:56,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:45:56,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:45:56,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:45:56,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:45:56,617 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:45:56,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:45:56,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:45:56,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:45:56,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:45:56,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:45:56,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:45:56,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:45:56,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:45:56,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:45:56,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:45:56,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:45:56,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:45:56,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:45:56,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:45:56,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:45:56,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:45:56,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:45:56,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:45:56,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:45:56,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:45:56,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:45:56,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:45:56,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:45:56,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:45:56,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:45:56,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:45:57,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:45:57,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:45:57,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:45:57,025 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:45:57,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:45:57,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2baee2657/3f0b96a405b14e7e88acaf89f6a95f87/FLAG38e667c71 [2020-10-27 23:45:57,807 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:45:57,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:45:57,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2baee2657/3f0b96a405b14e7e88acaf89f6a95f87/FLAG38e667c71 [2020-10-27 23:45:58,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2baee2657/3f0b96a405b14e7e88acaf89f6a95f87 [2020-10-27 23:45:58,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:45:58,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:45:58,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:58,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:45:58,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:45:58,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22de3b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58, skipping insertion in model container [2020-10-27 23:45:58,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:45:58,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:45:58,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:58,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:45:58,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:45:58,582 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:45:58,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58 WrapperNode [2020-10-27 23:45:58,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:45:58,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:45:58,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:45:58,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:45:58,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (1/1) ... [2020-10-27 23:45:58,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:45:58,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:45:58,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:45:58,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:45:58,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (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 [2020-10-27 23:45:58,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:45:58,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:45:58,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:45:58,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:45:58,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:45:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:45:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:45:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:45:58,723 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:45:58,724 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:45:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:45:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:45:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:45:59,398 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:45:59,399 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:45:59,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:59 BoogieIcfgContainer [2020-10-27 23:45:59,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:45:59,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:45:59,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:45:59,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:45:59,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:45:58" (1/3) ... [2020-10-27 23:45:59,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bcfeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:59, skipping insertion in model container [2020-10-27 23:45:59,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:45:58" (2/3) ... [2020-10-27 23:45:59,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bcfeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:45:59, skipping insertion in model container [2020-10-27 23:45:59,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:45:59" (3/3) ... [2020-10-27 23:45:59,417 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:45:59,430 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:45:59,435 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:45:59,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:45:59,478 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:45:59,479 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:45:59,479 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:45:59,479 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:45:59,479 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:45:59,479 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:45:59,479 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:45:59,479 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:45:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-10-27 23:45:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:45:59,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:59,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:59,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1579954712, now seen corresponding path program 1 times [2020-10-27 23:45:59,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:59,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030061101] [2020-10-27 23:45:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:00,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:00,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:04,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:46:04,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:46:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:46:04,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:46:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:46:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:46:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:46:05,312 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:05,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:05,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:05,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:05,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:05,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:05,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:46:05,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:05,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:05,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:05,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:05,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:46:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030061101] [2020-10-27 23:46:05,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:05,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:46:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710953179] [2020-10-27 23:46:05,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:46:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:46:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:46:05,442 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 4 states. [2020-10-27 23:46:05,716 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:06,244 INFO L93 Difference]: Finished difference Result 196 states and 307 transitions. [2020-10-27 23:46:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:46:06,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 23:46:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:06,259 INFO L225 Difference]: With dead ends: 196 [2020-10-27 23:46:06,259 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 23:46:06,264 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 [2020-10-27 23:46:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 23:46:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-27 23:46:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 23:46:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2020-10-27 23:46:06,335 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 53 [2020-10-27 23:46:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:06,336 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2020-10-27 23:46:06,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:46:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2020-10-27 23:46:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:46:06,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:06,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:06,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:46:06,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash 74551991, now seen corresponding path program 1 times [2020-10-27 23:46:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:06,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652202777] [2020-10-27 23:46:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:06,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:11,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:46:11,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:46:11,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:46:11,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:11,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:46:11,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:46:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:46:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 23:46:11,626 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:11,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:11,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:11,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:11,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:11,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:11,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:46:11,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:11,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:11,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:11,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652202777] [2020-10-27 23:46:11,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:11,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:46:11,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848823555] [2020-10-27 23:46:11,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:46:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:46:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:46:11,675 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand 4 states. [2020-10-27 23:46:11,877 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:12,242 INFO L93 Difference]: Finished difference Result 299 states and 454 transitions. [2020-10-27 23:46:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:46:12,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-27 23:46:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:12,246 INFO L225 Difference]: With dead ends: 299 [2020-10-27 23:46:12,246 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 23:46:12,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 23:46:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-27 23:46:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 23:46:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 300 transitions. [2020-10-27 23:46:12,279 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 300 transitions. Word has length 54 [2020-10-27 23:46:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:12,280 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 300 transitions. [2020-10-27 23:46:12,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:46:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 300 transitions. [2020-10-27 23:46:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:46:12,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:12,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:12,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:46:12,283 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:12,284 INFO L82 PathProgramCache]: Analyzing trace with hash -751884305, now seen corresponding path program 1 times [2020-10-27 23:46:12,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:12,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217365505] [2020-10-27 23:46:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:12,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:12,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:17,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:46:17,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:46:17,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:46:17,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:17,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:46:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:46:17,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:17,582 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:17,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:17,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:46:17,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:17,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:17,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:17,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:17,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217365505] [2020-10-27 23:46:17,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:17,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172312914] [2020-10-27 23:46:17,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:17,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:17,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:17,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:17,636 INFO L87 Difference]: Start difference. First operand 201 states and 300 transitions. Second operand 7 states. [2020-10-27 23:46:17,871 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:18,387 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:18,577 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:18,959 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:19,141 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:46:19,510 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:46:19,742 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:20,180 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:46:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:20,258 INFO L93 Difference]: Finished difference Result 1563 states and 2448 transitions. [2020-10-27 23:46:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:20,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 23:46:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:20,285 INFO L225 Difference]: With dead ends: 1563 [2020-10-27 23:46:20,285 INFO L226 Difference]: Without dead ends: 1392 [2020-10-27 23:46:20,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-10-27 23:46:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 533. [2020-10-27 23:46:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-27 23:46:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 826 transitions. [2020-10-27 23:46:20,409 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 826 transitions. Word has length 55 [2020-10-27 23:46:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:20,412 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 826 transitions. [2020-10-27 23:46:20,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 826 transitions. [2020-10-27 23:46:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:46:20,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:20,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:20,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:46:20,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash 83318186, now seen corresponding path program 1 times [2020-10-27 23:46:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:20,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997834748] [2020-10-27 23:46:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:20,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:25,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:46:25,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:46:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:25,695 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:25,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:25,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:25,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997834748] [2020-10-27 23:46:25,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:46:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581196738] [2020-10-27 23:46:25,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:46:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:46:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:46:25,734 INFO L87 Difference]: Start difference. First operand 533 states and 826 transitions. Second operand 4 states. [2020-10-27 23:46:25,945 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:26,461 INFO L93 Difference]: Finished difference Result 1443 states and 2262 transitions. [2020-10-27 23:46:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:46:26,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 23:46:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:26,472 INFO L225 Difference]: With dead ends: 1443 [2020-10-27 23:46:26,472 INFO L226 Difference]: Without dead ends: 940 [2020-10-27 23:46:26,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-10-27 23:46:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 937. [2020-10-27 23:46:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-27 23:46:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1452 transitions. [2020-10-27 23:46:26,599 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1452 transitions. Word has length 55 [2020-10-27 23:46:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:26,600 INFO L481 AbstractCegarLoop]: Abstraction has 937 states and 1452 transitions. [2020-10-27 23:46:26,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:46:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1452 transitions. [2020-10-27 23:46:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:46:26,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:26,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:26,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:46:26,602 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 671732378, now seen corresponding path program 1 times [2020-10-27 23:46:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:26,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963231681] [2020-10-27 23:46:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:30,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:46:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:30,614 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:30,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:30,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:30,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:46:30,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:30,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963231681] [2020-10-27 23:46:30,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:30,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179996105] [2020-10-27 23:46:30,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:30,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:30,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:30,650 INFO L87 Difference]: Start difference. First operand 937 states and 1452 transitions. Second operand 7 states. [2020-10-27 23:46:30,886 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:31,471 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:31,703 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:31,930 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:46:32,450 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:32,663 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:33,080 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:46:33,423 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:46:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:33,487 INFO L93 Difference]: Finished difference Result 6400 states and 9992 transitions. [2020-10-27 23:46:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:33,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:46:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:33,540 INFO L225 Difference]: With dead ends: 6400 [2020-10-27 23:46:33,540 INFO L226 Difference]: Without dead ends: 5793 [2020-10-27 23:46:33,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2020-10-27 23:46:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 1860. [2020-10-27 23:46:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 23:46:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2880 transitions. [2020-10-27 23:46:33,729 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2880 transitions. Word has length 56 [2020-10-27 23:46:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:33,729 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2880 transitions. [2020-10-27 23:46:33,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2880 transitions. [2020-10-27 23:46:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:46:33,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:33,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:33,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:46:33,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1431841788, now seen corresponding path program 1 times [2020-10-27 23:46:33,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:33,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695663882] [2020-10-27 23:46:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:37,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:46:37,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:46:37,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3338 [2020-10-27 23:46:37,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:37,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:46:37,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:46:37,348 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:37,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:37,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:37,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:37,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:37,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:46:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:37,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:37,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695663882] [2020-10-27 23:46:37,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:37,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204100638] [2020-10-27 23:46:37,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:37,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:37,387 INFO L87 Difference]: Start difference. First operand 1860 states and 2880 transitions. Second operand 7 states. [2020-10-27 23:46:37,704 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:38,221 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:38,424 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:38,642 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:46:39,181 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:46:39,434 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:39,925 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:46:40,323 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:46:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:40,388 INFO L93 Difference]: Finished difference Result 7564 states and 11716 transitions. [2020-10-27 23:46:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:40,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:46:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:40,424 INFO L225 Difference]: With dead ends: 7564 [2020-10-27 23:46:40,424 INFO L226 Difference]: Without dead ends: 6361 [2020-10-27 23:46:40,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2020-10-27 23:46:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 2456. [2020-10-27 23:46:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2020-10-27 23:46:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3812 transitions. [2020-10-27 23:46:40,653 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3812 transitions. Word has length 56 [2020-10-27 23:46:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:40,653 INFO L481 AbstractCegarLoop]: Abstraction has 2456 states and 3812 transitions. [2020-10-27 23:46:40,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3812 transitions. [2020-10-27 23:46:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:46:40,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:40,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:40,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:46:40,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash -596639297, now seen corresponding path program 1 times [2020-10-27 23:46:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:40,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826177865] [2020-10-27 23:46:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:46:41,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,601 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:41,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:41,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:41,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:41,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:46:41,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:41,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826177865] [2020-10-27 23:46:41,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:41,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768262991] [2020-10-27 23:46:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:41,642 INFO L87 Difference]: Start difference. First operand 2456 states and 3812 transitions. Second operand 7 states. [2020-10-27 23:46:41,893 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:46:42,414 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:46:42,993 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:43,236 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:43,467 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:46:43,803 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:44,032 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:44,705 INFO L93 Difference]: Finished difference Result 21626 states and 33729 transitions. [2020-10-27 23:46:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:46:44,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:46:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:44,787 INFO L225 Difference]: With dead ends: 21626 [2020-10-27 23:46:44,787 INFO L226 Difference]: Without dead ends: 19231 [2020-10-27 23:46:44,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:46:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19231 states. [2020-10-27 23:46:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19231 to 4858. [2020-10-27 23:46:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4858 states. [2020-10-27 23:46:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 7433 transitions. [2020-10-27 23:46:45,431 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 7433 transitions. Word has length 56 [2020-10-27 23:46:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:45,431 INFO L481 AbstractCegarLoop]: Abstraction has 4858 states and 7433 transitions. [2020-10-27 23:46:45,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 7433 transitions. [2020-10-27 23:46:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:46:45,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:45,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:45,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:46:45,433 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:45,434 INFO L82 PathProgramCache]: Analyzing trace with hash 231563492, now seen corresponding path program 1 times [2020-10-27 23:46:45,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:45,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772307957] [2020-10-27 23:46:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:45,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:46,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:46:46,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:46:46,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:46,419 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:46,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:46,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:46,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:46,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:46,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:46,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:46:46,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:46,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:46,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:46,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:46,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772307957] [2020-10-27 23:46:46,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:46,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:46:46,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503046267] [2020-10-27 23:46:46,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:46:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:46:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:46,459 INFO L87 Difference]: Start difference. First operand 4858 states and 7433 transitions. Second operand 5 states. [2020-10-27 23:46:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:47,808 INFO L93 Difference]: Finished difference Result 9901 states and 15035 transitions. [2020-10-27 23:46:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:46:47,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 23:46:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:47,832 INFO L225 Difference]: With dead ends: 9901 [2020-10-27 23:46:47,832 INFO L226 Difference]: Without dead ends: 9898 [2020-10-27 23:46:47,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9898 states. [2020-10-27 23:46:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9898 to 5114. [2020-10-27 23:46:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-27 23:46:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7689 transitions. [2020-10-27 23:46:48,313 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7689 transitions. Word has length 58 [2020-10-27 23:46:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:48,313 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7689 transitions. [2020-10-27 23:46:48,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:46:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7689 transitions. [2020-10-27 23:46:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:46:48,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:48,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:48,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:46:48,315 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash 853093125, now seen corresponding path program 1 times [2020-10-27 23:46:48,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:48,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834975501] [2020-10-27 23:46:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:49,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 909 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:46:49,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:49,540 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:49,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:49,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834975501] [2020-10-27 23:46:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:49,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472522028] [2020-10-27 23:46:49,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:49,577 INFO L87 Difference]: Start difference. First operand 5114 states and 7689 transitions. Second operand 7 states. [2020-10-27 23:46:49,870 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:46:50,476 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:46:51,184 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:51,429 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:51,659 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 23:46:52,129 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:46:52,372 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:46:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:53,422 INFO L93 Difference]: Finished difference Result 25298 states and 38105 transitions. [2020-10-27 23:46:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:46:53,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-27 23:46:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:53,475 INFO L225 Difference]: With dead ends: 25298 [2020-10-27 23:46:53,476 INFO L226 Difference]: Without dead ends: 20255 [2020-10-27 23:46:53,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:46:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20255 states. [2020-10-27 23:46:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20255 to 5114. [2020-10-27 23:46:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-27 23:46:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7625 transitions. [2020-10-27 23:46:54,274 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7625 transitions. Word has length 58 [2020-10-27 23:46:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:54,275 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7625 transitions. [2020-10-27 23:46:54,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7625 transitions. [2020-10-27 23:46:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 23:46:54,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:54,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:46:54,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:46:54,276 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1967732943, now seen corresponding path program 1 times [2020-10-27 23:46:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:54,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711549437] [2020-10-27 23:46:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:54,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:54,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:59,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:59,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:46:59,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:59,503 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:46:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:59,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:59,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:59,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711549437] [2020-10-27 23:46:59,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:59,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:46:59,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842212035] [2020-10-27 23:46:59,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:46:59,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:46:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:46:59,531 INFO L87 Difference]: Start difference. First operand 5114 states and 7625 transitions. Second operand 5 states. [2020-10-27 23:47:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:00,979 INFO L93 Difference]: Finished difference Result 16282 states and 23915 transitions. [2020-10-27 23:47:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:47:00,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-27 23:47:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:01,011 INFO L225 Difference]: With dead ends: 16282 [2020-10-27 23:47:01,012 INFO L226 Difference]: Without dead ends: 11207 [2020-10-27 23:47:01,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2020-10-27 23:47:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 5092. [2020-10-27 23:47:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2020-10-27 23:47:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7594 transitions. [2020-10-27 23:47:01,790 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7594 transitions. Word has length 59 [2020-10-27 23:47:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:01,790 INFO L481 AbstractCegarLoop]: Abstraction has 5092 states and 7594 transitions. [2020-10-27 23:47:01,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:47:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7594 transitions. [2020-10-27 23:47:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 23:47:01,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:01,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:01,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:47:01,792 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:01,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1113395853, now seen corresponding path program 1 times [2020-10-27 23:47:01,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:01,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045627793] [2020-10-27 23:47:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:01,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:47:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:02,371 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:02,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:02,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:02,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:47:02,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:02,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:47:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:02,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045627793] [2020-10-27 23:47:02,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:02,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:47:02,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62705595] [2020-10-27 23:47:02,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:47:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:47:02,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:47:02,413 INFO L87 Difference]: Start difference. First operand 5092 states and 7594 transitions. Second operand 4 states. [2020-10-27 23:47:02,638 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:47:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:03,885 INFO L93 Difference]: Finished difference Result 14239 states and 21161 transitions. [2020-10-27 23:47:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:47:03,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-27 23:47:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:03,904 INFO L225 Difference]: With dead ends: 14239 [2020-10-27 23:47:03,904 INFO L226 Difference]: Without dead ends: 9184 [2020-10-27 23:47:03,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:47:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2020-10-27 23:47:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 9053. [2020-10-27 23:47:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9053 states. [2020-10-27 23:47:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9053 states to 9053 states and 13157 transitions. [2020-10-27 23:47:04,885 INFO L78 Accepts]: Start accepts. Automaton has 9053 states and 13157 transitions. Word has length 59 [2020-10-27 23:47:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:04,885 INFO L481 AbstractCegarLoop]: Abstraction has 9053 states and 13157 transitions. [2020-10-27 23:47:04,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:47:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 9053 states and 13157 transitions. [2020-10-27 23:47:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 23:47:04,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:04,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:04,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:47:04,887 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1203130144, now seen corresponding path program 1 times [2020-10-27 23:47:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:04,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118442972] [2020-10-27 23:47:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:04,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:05,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 23:47:05,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:47:05,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:05,922 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:05,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:05,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:05,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:05,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:05,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:05,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118442972] [2020-10-27 23:47:05,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:05,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:47:05,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093950673] [2020-10-27 23:47:05,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:47:05,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:47:05,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:47:05,952 INFO L87 Difference]: Start difference. First operand 9053 states and 13157 transitions. Second operand 4 states. [2020-10-27 23:47:06,184 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:47:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:07,940 INFO L93 Difference]: Finished difference Result 17859 states and 26185 transitions. [2020-10-27 23:47:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:47:07,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 23:47:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:07,972 INFO L225 Difference]: With dead ends: 17859 [2020-10-27 23:47:07,972 INFO L226 Difference]: Without dead ends: 12803 [2020-10-27 23:47:07,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:47:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12803 states. [2020-10-27 23:47:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12803 to 12800. [2020-10-27 23:47:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12800 states. [2020-10-27 23:47:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 18500 transitions. [2020-10-27 23:47:09,332 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 18500 transitions. Word has length 60 [2020-10-27 23:47:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:09,332 INFO L481 AbstractCegarLoop]: Abstraction has 12800 states and 18500 transitions. [2020-10-27 23:47:09,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:47:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 18500 transitions. [2020-10-27 23:47:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:47:09,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:09,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:09,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:47:09,339 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash 835141509, now seen corresponding path program 1 times [2020-10-27 23:47:09,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:09,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162384978] [2020-10-27 23:47:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:47:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:14,591 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:14,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:14,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:14,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:14,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162384978] [2020-10-27 23:47:14,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:14,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:47:14,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357516680] [2020-10-27 23:47:14,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:47:14,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:47:14,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:47:14,620 INFO L87 Difference]: Start difference. First operand 12800 states and 18500 transitions. Second operand 4 states. [2020-10-27 23:47:15,737 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:47:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:16,129 INFO L93 Difference]: Finished difference Result 21672 states and 31476 transitions. [2020-10-27 23:47:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:47:16,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 23:47:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:16,142 INFO L225 Difference]: With dead ends: 21672 [2020-10-27 23:47:16,142 INFO L226 Difference]: Without dead ends: 8917 [2020-10-27 23:47:16,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:47:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8917 states. [2020-10-27 23:47:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8917 to 8914. [2020-10-27 23:47:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8914 states. [2020-10-27 23:47:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8914 states to 8914 states and 12893 transitions. [2020-10-27 23:47:17,302 INFO L78 Accepts]: Start accepts. Automaton has 8914 states and 12893 transitions. Word has length 82 [2020-10-27 23:47:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:17,302 INFO L481 AbstractCegarLoop]: Abstraction has 8914 states and 12893 transitions. [2020-10-27 23:47:17,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:47:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8914 states and 12893 transitions. [2020-10-27 23:47:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:47:17,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:17,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:47:17,308 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:17,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1723777507, now seen corresponding path program 1 times [2020-10-27 23:47:17,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42921075] [2020-10-27 23:47:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:20,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:47:22,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:47:22,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:22,577 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:22,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:22,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:22,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42921075] [2020-10-27 23:47:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:47:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:47:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534422793] [2020-10-27 23:47:22,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:22,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:22,612 INFO L87 Difference]: Start difference. First operand 8914 states and 12893 transitions. Second operand 6 states. [2020-10-27 23:47:22,851 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:47:24,338 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 23:47:24,609 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 23:47:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:27,361 INFO L93 Difference]: Finished difference Result 35967 states and 51815 transitions. [2020-10-27 23:47:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:27,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 23:47:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:27,397 INFO L225 Difference]: With dead ends: 35967 [2020-10-27 23:47:27,398 INFO L226 Difference]: Without dead ends: 31548 [2020-10-27 23:47:27,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31548 states. [2020-10-27 23:47:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31548 to 22111. [2020-10-27 23:47:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22111 states. [2020-10-27 23:47:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22111 states to 22111 states and 31787 transitions. [2020-10-27 23:47:30,205 INFO L78 Accepts]: Start accepts. Automaton has 22111 states and 31787 transitions. Word has length 83 [2020-10-27 23:47:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:30,205 INFO L481 AbstractCegarLoop]: Abstraction has 22111 states and 31787 transitions. [2020-10-27 23:47:30,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22111 states and 31787 transitions. [2020-10-27 23:47:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:47:30,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:30,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:47:30,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:47:30,214 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash 276830801, now seen corresponding path program 1 times [2020-10-27 23:47:30,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:30,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101663393] [2020-10-27 23:47:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:30,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:30,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:32,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:35,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:47:35,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:47:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:47:35,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:47:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:47:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 23:47:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,450 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 23:47:35,681 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:47:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101663393] [2020-10-27 23:47:35,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:47:35,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 23:47:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533477225] [2020-10-27 23:47:35,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:47:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:47:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:47:35,716 INFO L87 Difference]: Start difference. First operand 22111 states and 31787 transitions. Second operand 9 states. [2020-10-27 23:47:36,008 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 23:47:39,681 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:47:39,960 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:47:40,446 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 23:47:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:56,469 INFO L93 Difference]: Finished difference Result 162289 states and 230375 transitions. [2020-10-27 23:47:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 23:47:56,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-27 23:47:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:56,736 INFO L225 Difference]: With dead ends: 162289 [2020-10-27 23:47:56,736 INFO L226 Difference]: Without dead ends: 140302 [2020-10-27 23:47:56,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 23:47:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140302 states. [2020-10-27 23:48:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140302 to 74725. [2020-10-27 23:48:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74725 states. [2020-10-27 23:48:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74725 states to 74725 states and 106399 transitions. [2020-10-27 23:48:08,071 INFO L78 Accepts]: Start accepts. Automaton has 74725 states and 106399 transitions. Word has length 83 [2020-10-27 23:48:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:08,071 INFO L481 AbstractCegarLoop]: Abstraction has 74725 states and 106399 transitions. [2020-10-27 23:48:08,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:48:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74725 states and 106399 transitions. [2020-10-27 23:48:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:48:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:08,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:48:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:48:08,090 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -459271081, now seen corresponding path program 1 times [2020-10-27 23:48:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848378571] [2020-10-27 23:48:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:08,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:08,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:13,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:48:13,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:48:13,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:48:13,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:48:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:48:13,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 23:48:13,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:13,361 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 14 [2020-10-27 23:48:13,654 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:48:13,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:13,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:13,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:13,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:13,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:13,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:13,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848378571] [2020-10-27 23:48:13,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:48:13,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:48:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192146352] [2020-10-27 23:48:13,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:48:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:48:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:48:13,686 INFO L87 Difference]: Start difference. First operand 74725 states and 106399 transitions. Second operand 12 states. [2020-10-27 23:48:14,076 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 23:48:18,346 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:48:18,809 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:48:19,047 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:48:19,569 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 23:48:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:52,937 INFO L93 Difference]: Finished difference Result 288707 states and 402960 transitions. [2020-10-27 23:48:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 23:48:52,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-27 23:48:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:53,374 INFO L225 Difference]: With dead ends: 288707 [2020-10-27 23:48:53,374 INFO L226 Difference]: Without dead ends: 221680 [2020-10-27 23:48:53,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=493, Invalid=2699, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 23:48:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221680 states. [2020-10-27 23:49:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221680 to 123331. [2020-10-27 23:49:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123331 states. [2020-10-27 23:49:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123331 states to 123331 states and 175674 transitions. [2020-10-27 23:49:13,541 INFO L78 Accepts]: Start accepts. Automaton has 123331 states and 175674 transitions. Word has length 83 [2020-10-27 23:49:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:13,541 INFO L481 AbstractCegarLoop]: Abstraction has 123331 states and 175674 transitions. [2020-10-27 23:49:13,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:49:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 123331 states and 175674 transitions. [2020-10-27 23:49:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:49:13,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:13,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:49:13,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:49:13,565 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:13,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1469595860, now seen corresponding path program 1 times [2020-10-27 23:49:13,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:13,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595082575] [2020-10-27 23:49:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:13,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:14,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:49:18,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:49:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:49:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:18,880 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-27 23:49:19,170 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:49:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:19,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:19,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595082575] [2020-10-27 23:49:19,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:49:19,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:49:19,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070222897] [2020-10-27 23:49:19,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:49:19,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:49:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:49:19,212 INFO L87 Difference]: Start difference. First operand 123331 states and 175674 transitions. Second operand 12 states. [2020-10-27 23:49:19,529 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:49:20,170 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 23:49:20,379 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 23:49:23,013 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 23:49:23,300 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 23:49:23,643 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 23:49:23,927 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 23:49:25,630 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 23:49:26,152 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:49:26,441 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 23:49:27,103 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 140