/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:13:11,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:13:11,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:13:11,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:13:11,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:13:11,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:13:11,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:13:11,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:13:11,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:13:11,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:13:11,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:13:11,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:13:11,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:13:11,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:13:11,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:13:11,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:13:11,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:13:11,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:13:11,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:13:11,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:13:11,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:13:11,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:13:11,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:13:11,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:13:11,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:13:11,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:13:11,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:13:11,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:13:11,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:13:11,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:13:11,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:13:11,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:13:11,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:13:11,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:13:11,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:13:11,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:13:11,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:13:11,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:13:11,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:13:11,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:13:11,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:13:11,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:13:11,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:13:11,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:13:11,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:13:11,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:13:11,523 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:13:11,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:13:11,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:13:11,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:13:11,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:13:11,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:13:11,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:13:11,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:13:11,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:13:11,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:13:11,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:13:11,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:13:11,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:13:11,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:13:11,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:13:11,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:13:11,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:13:11,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:11,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:13:11,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:13:11,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:13:11,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:13:11,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:13:11,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:13:11,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:13:11,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:13:11,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:13:12,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:13:12,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:13:12,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:13:12,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:13:12,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:13:12,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbbb20de0/35d95f8a5b1c42f08e90256d1f63bcf9/FLAG1ce46299c [2020-10-29 13:13:12,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:13:12,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:13:12,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbbb20de0/35d95f8a5b1c42f08e90256d1f63bcf9/FLAG1ce46299c [2020-10-29 13:13:13,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbbb20de0/35d95f8a5b1c42f08e90256d1f63bcf9 [2020-10-29 13:13:13,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:13:13,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:13:13,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:13,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:13:13,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:13:13,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b49b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13, skipping insertion in model container [2020-10-29 13:13:13,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:13:13,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:13:13,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:13,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:13:13,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:13:13,595 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:13:13,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13 WrapperNode [2020-10-29 13:13:13,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:13:13,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:13:13,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:13:13,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:13:13,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... [2020-10-29 13:13:13,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:13:13,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:13:13,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:13:13,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:13:13,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:13:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:13:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:13:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:13:13,764 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:13:13,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:13:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:13:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:13:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:13:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:13:13,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:13:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:13:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:13:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:13:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:13:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:13:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:13:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:13:14,721 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:13:14,721 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:13:14,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:14 BoogieIcfgContainer [2020-10-29 13:13:14,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:13:14,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:13:14,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:13:14,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:13:14,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:13:13" (1/3) ... [2020-10-29 13:13:14,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b594af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:14, skipping insertion in model container [2020-10-29 13:13:14,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:13:13" (2/3) ... [2020-10-29 13:13:14,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b594af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:13:14, skipping insertion in model container [2020-10-29 13:13:14,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:13:14" (3/3) ... [2020-10-29 13:13:14,737 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:13:14,749 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:13:14,755 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:13:14,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:13:14,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:13:14,817 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:13:14,817 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:13:14,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:13:14,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:13:14,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:13:14,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:13:14,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:13:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-29 13:13:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:13:14,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:14,861 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] [2020-10-29 13:13:14,861 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-29 13:13:14,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:14,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752639228] [2020-10-29 13:13:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:17,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:20,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:13:20,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:13:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 13:13:20,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:20,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:20,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:13:20,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:13:20,557 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:20,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:20,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:20,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:20,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:13:20,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:20,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:20,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:20,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:20,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752639228] [2020-10-29 13:13:20,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:20,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:20,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712244982] [2020-10-29 13:13:20,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:20,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:20,674 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-29 13:13:21,008 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:13:21,671 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:13:21,819 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:13:22,521 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:13:22,673 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:13:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:22,686 INFO L93 Difference]: Finished difference Result 440 states and 696 transitions. [2020-10-29 13:13:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:22,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-29 13:13:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:22,705 INFO L225 Difference]: With dead ends: 440 [2020-10-29 13:13:22,705 INFO L226 Difference]: Without dead ends: 364 [2020-10-29 13:13:22,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:13:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-29 13:13:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 160. [2020-10-29 13:13:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-29 13:13:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 227 transitions. [2020-10-29 13:13:22,798 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 227 transitions. Word has length 52 [2020-10-29 13:13:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:22,798 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 227 transitions. [2020-10-29 13:13:22,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 227 transitions. [2020-10-29 13:13:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:13:22,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:22,801 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] [2020-10-29 13:13:22,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:13:22,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1128688483, now seen corresponding path program 1 times [2020-10-29 13:13:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:22,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558654441] [2020-10-29 13:13:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:22,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:22,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:27,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:27,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:13:27,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:13:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:13:27,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:27,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:27,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:13:27,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:13:28,154 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:28,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:28,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:28,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:28,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:13:28,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:28,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:28,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:13:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:28,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558654441] [2020-10-29 13:13:28,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:28,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:28,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265034547] [2020-10-29 13:13:28,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:28,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:28,241 INFO L87 Difference]: Start difference. First operand 160 states and 227 transitions. Second operand 6 states. [2020-10-29 13:13:28,442 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:13:28,932 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:13:29,078 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:13:29,717 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:13:29,867 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:13:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:29,885 INFO L93 Difference]: Finished difference Result 449 states and 662 transitions. [2020-10-29 13:13:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:13:29,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-29 13:13:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:29,890 INFO L225 Difference]: With dead ends: 449 [2020-10-29 13:13:29,890 INFO L226 Difference]: Without dead ends: 362 [2020-10-29 13:13:29,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:13:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-29 13:13:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 162. [2020-10-29 13:13:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 13:13:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2020-10-29 13:13:29,932 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 53 [2020-10-29 13:13:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:29,932 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2020-10-29 13:13:29,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2020-10-29 13:13:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:13:29,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:29,935 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] [2020-10-29 13:13:29,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:13:29,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash -95828956, now seen corresponding path program 1 times [2020-10-29 13:13:29,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:29,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867803391] [2020-10-29 13:13:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:29,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:13:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:13:34,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:13:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:34,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:13:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:13:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:35,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:35,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:35,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:35,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:35,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:35,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:35,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867803391] [2020-10-29 13:13:35,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:35,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:35,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801058156] [2020-10-29 13:13:35,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:35,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:35,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:35,179 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand 6 states. [2020-10-29 13:13:35,309 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:13:35,831 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:13:35,988 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:13:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:36,685 INFO L93 Difference]: Finished difference Result 865 states and 1298 transitions. [2020-10-29 13:13:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:36,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-29 13:13:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:36,695 INFO L225 Difference]: With dead ends: 865 [2020-10-29 13:13:36,695 INFO L226 Difference]: Without dead ends: 762 [2020-10-29 13:13:36,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:13:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-10-29 13:13:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 500. [2020-10-29 13:13:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-29 13:13:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 740 transitions. [2020-10-29 13:13:36,785 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 740 transitions. Word has length 54 [2020-10-29 13:13:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:36,787 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 740 transitions. [2020-10-29 13:13:36,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 740 transitions. [2020-10-29 13:13:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:13:36,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:36,800 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] [2020-10-29 13:13:36,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:13:36,801 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash 464608014, now seen corresponding path program 1 times [2020-10-29 13:13:36,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:36,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943136477] [2020-10-29 13:13:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:37,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:37,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:41,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:41,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:13:41,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:13:41,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:13:41,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:41,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:13:41,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:42,040 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:42,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:42,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:42,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:42,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:42,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:13:42,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:42,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:42,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:42,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:42,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:13:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:42,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943136477] [2020-10-29 13:13:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738139596] [2020-10-29 13:13:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:42,086 INFO L87 Difference]: Start difference. First operand 500 states and 740 transitions. Second operand 6 states. [2020-10-29 13:13:42,280 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:13:42,651 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:13:42,811 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:13:42,945 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:13:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:43,235 INFO L93 Difference]: Finished difference Result 1826 states and 2790 transitions. [2020-10-29 13:13:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:43,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-29 13:13:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:43,246 INFO L225 Difference]: With dead ends: 1826 [2020-10-29 13:13:43,246 INFO L226 Difference]: Without dead ends: 1497 [2020-10-29 13:13:43,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-29 13:13:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 997. [2020-10-29 13:13:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-10-29 13:13:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1499 transitions. [2020-10-29 13:13:43,347 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1499 transitions. Word has length 54 [2020-10-29 13:13:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:43,347 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1499 transitions. [2020-10-29 13:13:43,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1499 transitions. [2020-10-29 13:13:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:13:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:43,350 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] [2020-10-29 13:13:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:13:43,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1201199661, now seen corresponding path program 1 times [2020-10-29 13:13:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080891929] [2020-10-29 13:13:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:43,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:13:48,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:13:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:48,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:48,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:13:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:13:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:13:48,558 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:48,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:13:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:48,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:13:48,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080891929] [2020-10-29 13:13:48,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:48,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:13:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915460576] [2020-10-29 13:13:48,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:48,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:48,595 INFO L87 Difference]: Start difference. First operand 997 states and 1499 transitions. Second operand 6 states. [2020-10-29 13:13:48,755 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:13:49,128 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:13:49,276 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:13:49,414 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:13:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:49,740 INFO L93 Difference]: Finished difference Result 2558 states and 3886 transitions. [2020-10-29 13:13:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:13:49,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-29 13:13:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:49,754 INFO L225 Difference]: With dead ends: 2558 [2020-10-29 13:13:49,754 INFO L226 Difference]: Without dead ends: 2082 [2020-10-29 13:13:49,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:13:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2020-10-29 13:13:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1523. [2020-10-29 13:13:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2020-10-29 13:13:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2298 transitions. [2020-10-29 13:13:49,902 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2298 transitions. Word has length 54 [2020-10-29 13:13:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:49,903 INFO L481 AbstractCegarLoop]: Abstraction has 1523 states and 2298 transitions. [2020-10-29 13:13:49,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2298 transitions. [2020-10-29 13:13:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:13:49,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:49,904 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] [2020-10-29 13:13:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:13:49,904 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1849344733, now seen corresponding path program 1 times [2020-10-29 13:13:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459651061] [2020-10-29 13:13:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:49,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:52,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:54,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:54,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:13:54,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-29 13:13:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:13:54,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:55,155 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:13:55,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:13:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:55,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:55,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:13:55,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:13:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:13:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:13:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:13:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:13:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459651061] [2020-10-29 13:13:55,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:13:55,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:13:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871835537] [2020-10-29 13:13:55,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:13:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:13:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:13:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:13:55,215 INFO L87 Difference]: Start difference. First operand 1523 states and 2298 transitions. Second operand 6 states. [2020-10-29 13:13:55,382 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:13:55,764 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:13:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:56,175 INFO L93 Difference]: Finished difference Result 4319 states and 6545 transitions. [2020-10-29 13:13:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:13:56,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:13:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:56,192 INFO L225 Difference]: With dead ends: 4319 [2020-10-29 13:13:56,193 INFO L226 Difference]: Without dead ends: 2838 [2020-10-29 13:13:56,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:13:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2020-10-29 13:13:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2833. [2020-10-29 13:13:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-29 13:13:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 4256 transitions. [2020-10-29 13:13:56,450 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 4256 transitions. Word has length 55 [2020-10-29 13:13:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:13:56,450 INFO L481 AbstractCegarLoop]: Abstraction has 2833 states and 4256 transitions. [2020-10-29 13:13:56,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:13:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 4256 transitions. [2020-10-29 13:13:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:13:56,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:13:56,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:13:56,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:13:56,453 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:13:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:13:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash -27282908, now seen corresponding path program 1 times [2020-10-29 13:13:56,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:13:56,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187552322] [2020-10-29 13:13:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:13:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:13:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:58,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:13:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:01,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:14:01,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:14:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:14:01,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:01,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:14:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:14:01,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:01,670 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:01,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:01,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:01,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:01,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:01,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187552322] [2020-10-29 13:14:01,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:01,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:01,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838338759] [2020-10-29 13:14:01,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:01,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:01,721 INFO L87 Difference]: Start difference. First operand 2833 states and 4256 transitions. Second operand 6 states. [2020-10-29 13:14:01,897 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:14:02,259 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:14:02,413 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:14:02,574 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:14:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:03,065 INFO L93 Difference]: Finished difference Result 5691 states and 8598 transitions. [2020-10-29 13:14:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:14:03,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:14:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:03,091 INFO L225 Difference]: With dead ends: 5691 [2020-10-29 13:14:03,091 INFO L226 Difference]: Without dead ends: 4754 [2020-10-29 13:14:03,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2020-10-29 13:14:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 3494. [2020-10-29 13:14:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3494 states. [2020-10-29 13:14:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5266 transitions. [2020-10-29 13:14:03,392 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5266 transitions. Word has length 56 [2020-10-29 13:14:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:03,394 INFO L481 AbstractCegarLoop]: Abstraction has 3494 states and 5266 transitions. [2020-10-29 13:14:03,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5266 transitions. [2020-10-29 13:14:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:14:03,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:03,396 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] [2020-10-29 13:14:03,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:14:03,396 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:03,396 INFO L82 PathProgramCache]: Analyzing trace with hash -156531709, now seen corresponding path program 1 times [2020-10-29 13:14:03,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:03,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919547538] [2020-10-29 13:14:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:03,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:06,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:14:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:08,802 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:08,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:08,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:08,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:08,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:08,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:08,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:08,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:08,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919547538] [2020-10-29 13:14:08,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:08,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:14:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886515928] [2020-10-29 13:14:08,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:14:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:14:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:14:08,848 INFO L87 Difference]: Start difference. First operand 3494 states and 5266 transitions. Second operand 8 states. [2020-10-29 13:14:09,019 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:14:09,577 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:14:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:10,460 INFO L93 Difference]: Finished difference Result 7702 states and 11691 transitions. [2020-10-29 13:14:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:10,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-29 13:14:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:10,483 INFO L225 Difference]: With dead ends: 7702 [2020-10-29 13:14:10,483 INFO L226 Difference]: Without dead ends: 4407 [2020-10-29 13:14:10,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:14:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2020-10-29 13:14:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 2993. [2020-10-29 13:14:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-10-29 13:14:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4519 transitions. [2020-10-29 13:14:10,918 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4519 transitions. Word has length 56 [2020-10-29 13:14:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:10,919 INFO L481 AbstractCegarLoop]: Abstraction has 2993 states and 4519 transitions. [2020-10-29 13:14:10,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:14:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4519 transitions. [2020-10-29 13:14:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:10,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:10,920 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] [2020-10-29 13:14:10,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:14:10,920 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1851690260, now seen corresponding path program 1 times [2020-10-29 13:14:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:10,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529718907] [2020-10-29 13:14:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:10,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:13,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:15,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:14:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,172 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:14:16,313 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:16,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:16,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:16,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:16,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:16,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:16,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529718907] [2020-10-29 13:14:16,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:16,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:14:16,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846132888] [2020-10-29 13:14:16,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:14:16,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:14:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:16,355 INFO L87 Difference]: Start difference. First operand 2993 states and 4519 transitions. Second operand 9 states. [2020-10-29 13:14:16,520 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:14:17,191 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:17,380 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:14:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:18,146 INFO L93 Difference]: Finished difference Result 5392 states and 8175 transitions. [2020-10-29 13:14:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:18,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:14:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:18,165 INFO L225 Difference]: With dead ends: 5392 [2020-10-29 13:14:18,165 INFO L226 Difference]: Without dead ends: 3770 [2020-10-29 13:14:18,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:14:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2020-10-29 13:14:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2557. [2020-10-29 13:14:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2557 states. [2020-10-29 13:14:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3851 transitions. [2020-10-29 13:14:18,543 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3851 transitions. Word has length 57 [2020-10-29 13:14:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:18,544 INFO L481 AbstractCegarLoop]: Abstraction has 2557 states and 3851 transitions. [2020-10-29 13:14:18,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:14:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3851 transitions. [2020-10-29 13:14:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:18,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:18,545 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] [2020-10-29 13:14:18,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:14:18,545 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2114582137, now seen corresponding path program 1 times [2020-10-29 13:14:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:18,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215148631] [2020-10-29 13:14:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:18,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:22,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:23,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:14:23,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:23,857 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-29 13:14:24,052 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:24,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:24,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:24,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:24,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:24,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:24,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215148631] [2020-10-29 13:14:24,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:24,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 13:14:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363406437] [2020-10-29 13:14:24,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 13:14:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 13:14:24,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:14:24,105 INFO L87 Difference]: Start difference. First operand 2557 states and 3851 transitions. Second operand 11 states. [2020-10-29 13:14:24,292 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:14:25,587 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:14:25,762 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:14:25,967 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:28,764 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:14:28,936 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:14:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:33,445 INFO L93 Difference]: Finished difference Result 36255 states and 53993 transitions. [2020-10-29 13:14:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-29 13:14:33,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-29 13:14:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:33,547 INFO L225 Difference]: With dead ends: 36255 [2020-10-29 13:14:33,548 INFO L226 Difference]: Without dead ends: 33840 [2020-10-29 13:14:33,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=687, Invalid=3345, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 13:14:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33840 states. [2020-10-29 13:14:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33840 to 3869. [2020-10-29 13:14:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3869 states. [2020-10-29 13:14:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5792 transitions. [2020-10-29 13:14:34,828 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5792 transitions. Word has length 57 [2020-10-29 13:14:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:34,829 INFO L481 AbstractCegarLoop]: Abstraction has 3869 states and 5792 transitions. [2020-10-29 13:14:34,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 13:14:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5792 transitions. [2020-10-29 13:14:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:14:34,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:34,830 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] [2020-10-29 13:14:34,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:14:34,831 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -820880582, now seen corresponding path program 1 times [2020-10-29 13:14:34,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:34,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123673095] [2020-10-29 13:14:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:34,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:36,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:39,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:14:39,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:14:39,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:14:39,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:40,063 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:40,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:40,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:40,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:40,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:40,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:40,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123673095] [2020-10-29 13:14:40,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:40,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490334029] [2020-10-29 13:14:40,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:40,108 INFO L87 Difference]: Start difference. First operand 3869 states and 5792 transitions. Second operand 6 states. [2020-10-29 13:14:40,260 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:14:42,552 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:14:42,827 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:14:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:45,727 INFO L93 Difference]: Finished difference Result 27735 states and 42050 transitions. [2020-10-29 13:14:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:45,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:14:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:45,781 INFO L225 Difference]: With dead ends: 27735 [2020-10-29 13:14:45,781 INFO L226 Difference]: Without dead ends: 24102 [2020-10-29 13:14:45,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24102 states. [2020-10-29 13:14:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24102 to 10987. [2020-10-29 13:14:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10987 states. [2020-10-29 13:14:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 16570 transitions. [2020-10-29 13:14:48,121 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 16570 transitions. Word has length 57 [2020-10-29 13:14:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 10987 states and 16570 transitions. [2020-10-29 13:14:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 16570 transitions. [2020-10-29 13:14:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:14:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:48,124 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] [2020-10-29 13:14:48,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:14:48,124 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2127629833, now seen corresponding path program 1 times [2020-10-29 13:14:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:48,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425404870] [2020-10-29 13:14:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:49,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:14:49,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:49,405 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:14:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:49,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:49,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:49,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:49,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:49,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:14:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425404870] [2020-10-29 13:14:49,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:49,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:14:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357620023] [2020-10-29 13:14:49,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:14:49,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:14:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:14:49,440 INFO L87 Difference]: Start difference. First operand 10987 states and 16570 transitions. Second operand 10 states. [2020-10-29 13:14:49,620 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:14:50,508 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:14:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:56,099 INFO L93 Difference]: Finished difference Result 32702 states and 49268 transitions. [2020-10-29 13:14:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:14:56,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-29 13:14:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:56,167 INFO L225 Difference]: With dead ends: 32702 [2020-10-29 13:14:56,168 INFO L226 Difference]: Without dead ends: 27384 [2020-10-29 13:14:56,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:14:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27384 states. [2020-10-29 13:14:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27384 to 10951. [2020-10-29 13:14:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10951 states. [2020-10-29 13:14:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10951 states to 10951 states and 16520 transitions. [2020-10-29 13:14:58,803 INFO L78 Accepts]: Start accepts. Automaton has 10951 states and 16520 transitions. Word has length 58 [2020-10-29 13:14:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:58,804 INFO L481 AbstractCegarLoop]: Abstraction has 10951 states and 16520 transitions. [2020-10-29 13:14:58,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:14:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 10951 states and 16520 transitions. [2020-10-29 13:14:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:14:58,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:58,805 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] [2020-10-29 13:14:58,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:14:58,805 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash -807832886, now seen corresponding path program 1 times [2020-10-29 13:14:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:58,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018285074] [2020-10-29 13:14:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:01,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:15:03,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:04,086 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:15:04,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:04,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:04,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:04,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018285074] [2020-10-29 13:15:04,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:04,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:04,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488630181] [2020-10-29 13:15:04,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:04,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:04,117 INFO L87 Difference]: Start difference. First operand 10951 states and 16520 transitions. Second operand 9 states. [2020-10-29 13:15:04,284 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:15:04,850 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:15:06,451 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:15:06,614 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:15:12,605 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:15:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:14,440 INFO L93 Difference]: Finished difference Result 51029 states and 76826 transitions. [2020-10-29 13:15:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:15:14,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-29 13:15:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:14,535 INFO L225 Difference]: With dead ends: 51029 [2020-10-29 13:15:14,536 INFO L226 Difference]: Without dead ends: 40273 [2020-10-29 13:15:14,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-10-29 13:15:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40273 states. [2020-10-29 13:15:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40273 to 10806. [2020-10-29 13:15:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10806 states. [2020-10-29 13:15:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10806 states to 10806 states and 16182 transitions. [2020-10-29 13:15:17,328 INFO L78 Accepts]: Start accepts. Automaton has 10806 states and 16182 transitions. Word has length 58 [2020-10-29 13:15:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:17,329 INFO L481 AbstractCegarLoop]: Abstraction has 10806 states and 16182 transitions. [2020-10-29 13:15:17,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10806 states and 16182 transitions. [2020-10-29 13:15:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:15:17,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:17,330 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] [2020-10-29 13:15:17,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:15:17,330 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash -622701495, now seen corresponding path program 1 times [2020-10-29 13:15:17,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:17,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199923065] [2020-10-29 13:15:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:15:22,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:22,665 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:15:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:22,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199923065] [2020-10-29 13:15:22,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:22,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:22,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15098162] [2020-10-29 13:15:22,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:22,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:22,688 INFO L87 Difference]: Start difference. First operand 10806 states and 16182 transitions. Second operand 9 states. [2020-10-29 13:15:22,874 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:15:23,799 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:15:25,449 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:15:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:29,144 INFO L93 Difference]: Finished difference Result 31018 states and 46269 transitions. [2020-10-29 13:15:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:15:29,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-29 13:15:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:29,175 INFO L225 Difference]: With dead ends: 31018 [2020-10-29 13:15:29,175 INFO L226 Difference]: Without dead ends: 20417 [2020-10-29 13:15:29,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:15:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20417 states. [2020-10-29 13:15:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20417 to 10806. [2020-10-29 13:15:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10806 states. [2020-10-29 13:15:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10806 states to 10806 states and 16088 transitions. [2020-10-29 13:15:31,860 INFO L78 Accepts]: Start accepts. Automaton has 10806 states and 16088 transitions. Word has length 59 [2020-10-29 13:15:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:31,861 INFO L481 AbstractCegarLoop]: Abstraction has 10806 states and 16088 transitions. [2020-10-29 13:15:31,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10806 states and 16088 transitions. [2020-10-29 13:15:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:15:31,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:31,862 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] [2020-10-29 13:15:31,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:15:31,862 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 758056329, now seen corresponding path program 1 times [2020-10-29 13:15:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121195247] [2020-10-29 13:15:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:15:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:33,699 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:15:33,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:33,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:33,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:33,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:33,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:33,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:33,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121195247] [2020-10-29 13:15:33,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:33,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:15:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456772540] [2020-10-29 13:15:33,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:15:33,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:15:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:15:33,729 INFO L87 Difference]: Start difference. First operand 10806 states and 16088 transitions. Second operand 10 states. [2020-10-29 13:15:34,046 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:15:36,047 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:15:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:37,966 INFO L93 Difference]: Finished difference Result 11800 states and 17576 transitions. [2020-10-29 13:15:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:37,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-29 13:15:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:37,980 INFO L225 Difference]: With dead ends: 11800 [2020-10-29 13:15:37,980 INFO L226 Difference]: Without dead ends: 10788 [2020-10-29 13:15:37,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:15:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2020-10-29 13:15:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10787. [2020-10-29 13:15:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10787 states. [2020-10-29 13:15:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10787 states to 10787 states and 16065 transitions. [2020-10-29 13:15:40,575 INFO L78 Accepts]: Start accepts. Automaton has 10787 states and 16065 transitions. Word has length 60 [2020-10-29 13:15:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:40,575 INFO L481 AbstractCegarLoop]: Abstraction has 10787 states and 16065 transitions. [2020-10-29 13:15:40,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:15:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10787 states and 16065 transitions. [2020-10-29 13:15:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:15:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:40,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:40,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:15:40,580 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 879792049, now seen corresponding path program 1 times [2020-10-29 13:15:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:40,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019864285] [2020-10-29 13:15:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:40,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:45,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:15:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:15:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:15:45,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:45,781 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:15:45,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:45,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:45,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:45,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:45,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019864285] [2020-10-29 13:15:45,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:45,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:15:45,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136854001] [2020-10-29 13:15:45,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:15:45,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:15:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:15:45,812 INFO L87 Difference]: Start difference. First operand 10787 states and 16065 transitions. Second operand 5 states. [2020-10-29 13:15:45,990 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:15:47,289 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:15:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:50,758 INFO L93 Difference]: Finished difference Result 28667 states and 42583 transitions. [2020-10-29 13:15:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:15:50,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-29 13:15:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:50,781 INFO L225 Difference]: With dead ends: 28667 [2020-10-29 13:15:50,781 INFO L226 Difference]: Without dead ends: 18092 [2020-10-29 13:15:50,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18092 states. [2020-10-29 13:15:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18092 to 17873. [2020-10-29 13:15:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17873 states. [2020-10-29 13:15:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17873 states to 17873 states and 26019 transitions. [2020-10-29 13:15:55,115 INFO L78 Accepts]: Start accepts. Automaton has 17873 states and 26019 transitions. Word has length 76 [2020-10-29 13:15:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:55,116 INFO L481 AbstractCegarLoop]: Abstraction has 17873 states and 26019 transitions. [2020-10-29 13:15:55,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:15:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 17873 states and 26019 transitions. [2020-10-29 13:15:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:15:55,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:55,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:15:55,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:15:55,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 924577871, now seen corresponding path program 1 times [2020-10-29 13:15:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:55,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908279825] [2020-10-29 13:15:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:55,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:00,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:16:00,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:16:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:16:00,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:00,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:16:00,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:00,323 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:00,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:00,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:00,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:00,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908279825] [2020-10-29 13:16:00,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:00,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:00,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061507381] [2020-10-29 13:16:00,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:00,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:00,394 INFO L87 Difference]: Start difference. First operand 17873 states and 26019 transitions. Second operand 6 states. [2020-10-29 13:16:00,564 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:16:02,015 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:16:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:04,126 INFO L93 Difference]: Finished difference Result 29621 states and 43301 transitions. [2020-10-29 13:16:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:04,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-29 13:16:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:04,140 INFO L225 Difference]: With dead ends: 29621 [2020-10-29 13:16:04,140 INFO L226 Difference]: Without dead ends: 11886 [2020-10-29 13:16:04,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2020-10-29 13:16:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11883. [2020-10-29 13:16:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11883 states. [2020-10-29 13:16:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11883 states to 11883 states and 17269 transitions. [2020-10-29 13:16:07,294 INFO L78 Accepts]: Start accepts. Automaton has 11883 states and 17269 transitions. Word has length 77 [2020-10-29 13:16:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:07,294 INFO L481 AbstractCegarLoop]: Abstraction has 11883 states and 17269 transitions. [2020-10-29 13:16:07,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 11883 states and 17269 transitions. [2020-10-29 13:16:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:16:07,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:07,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:07,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:16:07,302 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash 761869739, now seen corresponding path program 1 times [2020-10-29 13:16:07,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:07,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484476709] [2020-10-29 13:16:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:07,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:12,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:12,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:16:12,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:16:12,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:16:12,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:12,501 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2020-10-29 13:16:12,677 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:12,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:12,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484476709] [2020-10-29 13:16:12,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:12,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:16:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971202018] [2020-10-29 13:16:12,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:16:12,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:16:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:12,706 INFO L87 Difference]: Start difference. First operand 11883 states and 17269 transitions. Second operand 9 states. [2020-10-29 13:16:12,901 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:16:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:16,735 INFO L93 Difference]: Finished difference Result 23618 states and 34373 transitions. [2020-10-29 13:16:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:16,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-29 13:16:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:16,752 INFO L225 Difference]: With dead ends: 23618 [2020-10-29 13:16:16,753 INFO L226 Difference]: Without dead ends: 11883 [2020-10-29 13:16:16,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:16:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11883 states. [2020-10-29 13:16:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11883 to 11883. [2020-10-29 13:16:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11883 states. [2020-10-29 13:16:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11883 states to 11883 states and 17265 transitions. [2020-10-29 13:16:20,010 INFO L78 Accepts]: Start accepts. Automaton has 11883 states and 17265 transitions. Word has length 78 [2020-10-29 13:16:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:20,010 INFO L481 AbstractCegarLoop]: Abstraction has 11883 states and 17265 transitions. [2020-10-29 13:16:20,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:16:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 11883 states and 17265 transitions. [2020-10-29 13:16:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:16:20,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:20,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:20,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:16:20,017 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1390882889, now seen corresponding path program 1 times [2020-10-29 13:16:20,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:20,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751792762] [2020-10-29 13:16:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:16:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:21,368 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:21,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:21,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751792762] [2020-10-29 13:16:21,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:21,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:21,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998691677] [2020-10-29 13:16:21,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:21,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:21,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:21,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:21,410 INFO L87 Difference]: Start difference. First operand 11883 states and 17265 transitions. Second operand 6 states. [2020-10-29 13:16:21,594 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:16:22,999 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:16:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:24,895 INFO L93 Difference]: Finished difference Result 17041 states and 24861 transitions. [2020-10-29 13:16:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:24,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-29 13:16:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:24,905 INFO L225 Difference]: With dead ends: 17041 [2020-10-29 13:16:24,906 INFO L226 Difference]: Without dead ends: 9181 [2020-10-29 13:16:24,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:16:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2020-10-29 13:16:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 6566. [2020-10-29 13:16:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6566 states. [2020-10-29 13:16:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6566 states to 6566 states and 9496 transitions. [2020-10-29 13:16:26,718 INFO L78 Accepts]: Start accepts. Automaton has 6566 states and 9496 transitions. Word has length 79 [2020-10-29 13:16:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:26,718 INFO L481 AbstractCegarLoop]: Abstraction has 6566 states and 9496 transitions. [2020-10-29 13:16:26,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6566 states and 9496 transitions. [2020-10-29 13:16:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:16:26,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:26,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:26,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:16:26,722 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1306605347, now seen corresponding path program 1 times [2020-10-29 13:16:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728583358] [2020-10-29 13:16:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 13:16:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:16:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:32,540 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:32,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:32,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:32,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728583358] [2020-10-29 13:16:32,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:32,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-29 13:16:32,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849786356] [2020-10-29 13:16:32,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 13:16:32,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:32,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 13:16:32,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:16:32,583 INFO L87 Difference]: Start difference. First operand 6566 states and 9496 transitions. Second operand 18 states. [2020-10-29 13:16:32,891 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 13:16:35,615 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:16:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:40,464 INFO L93 Difference]: Finished difference Result 24087 states and 35191 transitions. [2020-10-29 13:16:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 13:16:40,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-29 13:16:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:40,489 INFO L225 Difference]: With dead ends: 24087 [2020-10-29 13:16:40,489 INFO L226 Difference]: Without dead ends: 19958 [2020-10-29 13:16:40,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 13:16:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19958 states. [2020-10-29 13:16:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19958 to 6560. [2020-10-29 13:16:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6560 states. [2020-10-29 13:16:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 9489 transitions. [2020-10-29 13:16:42,473 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 9489 transitions. Word has length 81 [2020-10-29 13:16:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:42,474 INFO L481 AbstractCegarLoop]: Abstraction has 6560 states and 9489 transitions. [2020-10-29 13:16:42,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 13:16:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 9489 transitions. [2020-10-29 13:16:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:16:42,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:42,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:42,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:16:42,477 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1306658626, now seen corresponding path program 1 times [2020-10-29 13:16:42,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:42,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570614360] [2020-10-29 13:16:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:42,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:42,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-29 13:16:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 13:16:42,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:43,076 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:43,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:43,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:43,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570614360] [2020-10-29 13:16:43,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:43,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513846205] [2020-10-29 13:16:43,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:43,101 INFO L87 Difference]: Start difference. First operand 6560 states and 9489 transitions. Second operand 4 states. [2020-10-29 13:16:43,274 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:16:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:47,252 INFO L93 Difference]: Finished difference Result 18726 states and 26961 transitions. [2020-10-29 13:16:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:16:47,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:16:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:47,269 INFO L225 Difference]: With dead ends: 18726 [2020-10-29 13:16:47,269 INFO L226 Difference]: Without dead ends: 12283 [2020-10-29 13:16:47,276 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 [2020-10-29 13:16:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12283 states. [2020-10-29 13:16:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12283 to 11632. [2020-10-29 13:16:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11632 states. [2020-10-29 13:16:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11632 states to 11632 states and 16585 transitions. [2020-10-29 13:16:50,729 INFO L78 Accepts]: Start accepts. Automaton has 11632 states and 16585 transitions. Word has length 82 [2020-10-29 13:16:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:50,729 INFO L481 AbstractCegarLoop]: Abstraction has 11632 states and 16585 transitions. [2020-10-29 13:16:50,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:16:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11632 states and 16585 transitions. [2020-10-29 13:16:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:16:50,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:50,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:16:50,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:16:50,731 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:50,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1918143343, now seen corresponding path program 1 times [2020-10-29 13:16:50,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:50,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059466002] [2020-10-29 13:16:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:16:50,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:16:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-29 13:16:50,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:50,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-29 13:16:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 13:16:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:51,146 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:16:51,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:51,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:51,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:51,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:51,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:51,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:51,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059466002] [2020-10-29 13:16:51,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:51,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:16:51,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810428779] [2020-10-29 13:16:51,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:16:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:16:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:16:51,174 INFO L87 Difference]: Start difference. First operand 11632 states and 16585 transitions. Second operand 4 states.