/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:56:26,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:56:26,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:56:26,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:56:26,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:56:26,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:56:26,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:56:26,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:56:26,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:56:26,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:56:26,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:56:26,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:56:26,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:56:26,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:56:26,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:56:26,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:56:26,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:56:26,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:56:26,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:56:26,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:56:26,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:56:26,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:56:26,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:56:26,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:56:26,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:56:26,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:56:26,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:56:26,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:56:26,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:56:26,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:56:26,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:56:26,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:56:26,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:56:26,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:56:26,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:56:26,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:56:26,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:56:26,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:56:26,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:56:26,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:56:26,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:56:26,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:56:26,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:56:26,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:56:26,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:56:26,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:56:26,507 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:56:26,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:56:26,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:56:26,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:56:26,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:56:26,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:56:26,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:56:26,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:56:26,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:56:26,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:56:26,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:56:26,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:56:26,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:56:26,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:56:26,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:56:26,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:56:26,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:56:26,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:56:26,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:56:26,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:56:26,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:56:26,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:56:26,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:56:26,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:56:26,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:56:26,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:56:26,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:56:26,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:56:26,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:56:26,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:56:26,944 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:56:26,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:56:27,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c774fee/2b9c2c166f584a33baa74e9b43382672/FLAGf0097721a [2020-10-28 18:56:27,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:56:27,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:56:27,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c774fee/2b9c2c166f584a33baa74e9b43382672/FLAGf0097721a [2020-10-28 18:56:28,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c774fee/2b9c2c166f584a33baa74e9b43382672 [2020-10-28 18:56:28,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:56:28,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:56:28,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:56:28,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:56:28,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:56:28,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:56:28" (1/1) ... [2020-10-28 18:56:28,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63360f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:28, skipping insertion in model container [2020-10-28 18:56:28,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:56:28" (1/1) ... [2020-10-28 18:56:28,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:56:28,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:56:29,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:56:29,984 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:56:30,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:56:30,547 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:56:30,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30 WrapperNode [2020-10-28 18:56:30,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:56:30,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:56:30,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:56:30,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:56:30,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... [2020-10-28 18:56:30,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:56:30,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:56:30,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:56:30,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:56:30,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:56:30,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:56:30,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:56:30,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:56:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:56:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:56:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:56:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:56:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:56:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:56:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:56:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:56:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:56:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:56:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:56:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:56:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:56:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:56:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:56:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:56:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:56:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:56:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:56:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:56:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:56:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:56:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:56:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:56:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:56:36,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:56:36,589 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:56:36,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:56:36 BoogieIcfgContainer [2020-10-28 18:56:36,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:56:36,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:56:36,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:56:36,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:56:36,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:56:28" (1/3) ... [2020-10-28 18:56:36,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baf505b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:56:36, skipping insertion in model container [2020-10-28 18:56:36,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:56:30" (2/3) ... [2020-10-28 18:56:36,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baf505b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:56:36, skipping insertion in model container [2020-10-28 18:56:36,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:56:36" (3/3) ... [2020-10-28 18:56:36,606 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:56:36,619 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:56:36,625 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:56:36,638 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:56:36,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:56:36,690 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:56:36,690 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:56:36,690 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:56:36,690 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:56:36,690 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:56:36,690 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:56:36,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:56:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states. [2020-10-28 18:56:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:56:36,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:36,779 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] [2020-10-28 18:56:36,779 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1940053764, now seen corresponding path program 1 times [2020-10-28 18:56:36,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:36,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139908678] [2020-10-28 18:56:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:37,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:42,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:56:42,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:56:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 18:56:42,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:42,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:56:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:56:42,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:56:47,557 WARN L193 SmtUtils]: Spent 4.58 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:56:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:47,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:47,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:47,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:56:47,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:47,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:47,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:47,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139908678] [2020-10-28 18:56:47,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:47,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:56:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025702065] [2020-10-28 18:56:47,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:56:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:56:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:56:47,713 INFO L87 Difference]: Start difference. First operand 1115 states. Second operand 7 states. [2020-10-28 18:56:52,742 WARN L193 SmtUtils]: Spent 4.80 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-28 18:57:12,789 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification that was a NOOP. DAG size: 654 [2020-10-28 18:57:19,301 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 18:57:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:19,504 INFO L93 Difference]: Finished difference Result 2049 states and 3586 transitions. [2020-10-28 18:57:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:57:19,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-28 18:57:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:19,575 INFO L225 Difference]: With dead ends: 2049 [2020-10-28 18:57:19,576 INFO L226 Difference]: Without dead ends: 1776 [2020-10-28 18:57:19,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:57:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2020-10-28 18:57:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1223. [2020-10-28 18:57:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2020-10-28 18:57:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1593 transitions. [2020-10-28 18:57:19,765 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1593 transitions. Word has length 69 [2020-10-28 18:57:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:19,765 INFO L481 AbstractCegarLoop]: Abstraction has 1223 states and 1593 transitions. [2020-10-28 18:57:19,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:57:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1593 transitions. [2020-10-28 18:57:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:57:19,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:19,775 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] [2020-10-28 18:57:19,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:57:19,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2095946787, now seen corresponding path program 1 times [2020-10-28 18:57:19,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:19,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986829927] [2020-10-28 18:57:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:20,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:24,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:24,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:57:24,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:57:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:57:24,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:24,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:57:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:57:29,548 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:57:29,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:29,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:29,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:29,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:29,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 18:57:29,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:29,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:57:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:29,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986829927] [2020-10-28 18:57:29,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:29,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:29,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585151145] [2020-10-28 18:57:29,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:29,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:29,723 INFO L87 Difference]: Start difference. First operand 1223 states and 1593 transitions. Second operand 6 states. [2020-10-28 18:57:34,315 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 18:57:47,378 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 18:57:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:48,681 INFO L93 Difference]: Finished difference Result 1815 states and 2404 transitions. [2020-10-28 18:57:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:48,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:57:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:48,689 INFO L225 Difference]: With dead ends: 1815 [2020-10-28 18:57:48,689 INFO L226 Difference]: Without dead ends: 1200 [2020-10-28 18:57:48,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:57:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-10-28 18:57:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1194. [2020-10-28 18:57:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-10-28 18:57:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1534 transitions. [2020-10-28 18:57:48,745 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1534 transitions. Word has length 69 [2020-10-28 18:57:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:48,746 INFO L481 AbstractCegarLoop]: Abstraction has 1194 states and 1534 transitions. [2020-10-28 18:57:48,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1534 transitions. [2020-10-28 18:57:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:57:48,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:48,749 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] [2020-10-28 18:57:48,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:57:48,750 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash -721698554, now seen corresponding path program 1 times [2020-10-28 18:57:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:48,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306063522] [2020-10-28 18:57:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:50,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:53,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:53,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:57:53,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:57:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 18:57:53,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:53,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:57:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:57:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:57:58,396 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:57:58,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:58,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:58,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:58,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:57:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:58,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:58,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306063522] [2020-10-28 18:57:58,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:58,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:58,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440435215] [2020-10-28 18:57:58,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:58,490 INFO L87 Difference]: Start difference. First operand 1194 states and 1534 transitions. Second operand 4 states. [2020-10-28 18:58:03,083 WARN L193 SmtUtils]: Spent 4.47 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 18:58:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:12,635 INFO L93 Difference]: Finished difference Result 1905 states and 2589 transitions. [2020-10-28 18:58:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:12,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:58:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:12,646 INFO L225 Difference]: With dead ends: 1905 [2020-10-28 18:58:12,646 INFO L226 Difference]: Without dead ends: 1546 [2020-10-28 18:58:12,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-28 18:58:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1538. [2020-10-28 18:58:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2020-10-28 18:58:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2040 transitions. [2020-10-28 18:58:12,737 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2040 transitions. Word has length 69 [2020-10-28 18:58:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:12,738 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2040 transitions. [2020-10-28 18:58:12,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2040 transitions. [2020-10-28 18:58:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:58:12,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:12,742 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] [2020-10-28 18:58:12,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:58:12,743 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash -895088971, now seen corresponding path program 1 times [2020-10-28 18:58:12,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:12,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120476659] [2020-10-28 18:58:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:12,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:15,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:17,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:17,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:58:17,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:58:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 18:58:17,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:17,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 18:58:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:58:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:22,734 WARN L193 SmtUtils]: Spent 4.76 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:58:22,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:22,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:22,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:22,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:22,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:22,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 18:58:22,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:22,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:22,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:22,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:22,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:22,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120476659] [2020-10-28 18:58:22,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:22,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849580548] [2020-10-28 18:58:22,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:22,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:22,838 INFO L87 Difference]: Start difference. First operand 1538 states and 2040 transitions. Second operand 4 states. [2020-10-28 18:58:27,884 WARN L193 SmtUtils]: Spent 4.88 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 18:58:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:37,080 INFO L93 Difference]: Finished difference Result 2842 states and 3961 transitions. [2020-10-28 18:58:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:37,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:58:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:37,093 INFO L225 Difference]: With dead ends: 2842 [2020-10-28 18:58:37,094 INFO L226 Difference]: Without dead ends: 2130 [2020-10-28 18:58:37,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-10-28 18:58:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2124. [2020-10-28 18:58:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2124 states. [2020-10-28 18:58:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 2886 transitions. [2020-10-28 18:58:37,204 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 2886 transitions. Word has length 69 [2020-10-28 18:58:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:37,207 INFO L481 AbstractCegarLoop]: Abstraction has 2124 states and 2886 transitions. [2020-10-28 18:58:37,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 2886 transitions. [2020-10-28 18:58:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:58:37,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:37,211 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] [2020-10-28 18:58:37,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:58:37,212 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash -832783090, now seen corresponding path program 1 times [2020-10-28 18:58:37,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:37,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992725050] [2020-10-28 18:58:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:37,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:40,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:42,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:58:42,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:58:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:58:42,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:42,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:42,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:42,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:58:42,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:58:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:47,352 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:58:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:47,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:47,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:47,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:47,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:47,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:58:47,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:47,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:47,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:47,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992725050] [2020-10-28 18:58:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:47,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:58:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539136646] [2020-10-28 18:58:47,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:47,440 INFO L87 Difference]: Start difference. First operand 2124 states and 2886 transitions. Second operand 8 states. [2020-10-28 18:58:52,372 WARN L193 SmtUtils]: Spent 4.75 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-28 18:59:06,526 WARN L193 SmtUtils]: Spent 4.86 s on a formula simplification that was a NOOP. DAG size: 654 [2020-10-28 18:59:11,725 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 18:59:18,306 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 18:59:23,061 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 18:59:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:23,502 INFO L93 Difference]: Finished difference Result 13572 states and 19962 transitions. [2020-10-28 18:59:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:59:23,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:59:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:23,563 INFO L225 Difference]: With dead ends: 13572 [2020-10-28 18:59:23,563 INFO L226 Difference]: Without dead ends: 12482 [2020-10-28 18:59:23,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:59:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12482 states. [2020-10-28 18:59:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12482 to 2176. [2020-10-28 18:59:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2176 states. [2020-10-28 18:59:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2930 transitions. [2020-10-28 18:59:23,845 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2930 transitions. Word has length 69 [2020-10-28 18:59:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:23,845 INFO L481 AbstractCegarLoop]: Abstraction has 2176 states and 2930 transitions. [2020-10-28 18:59:23,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2930 transitions. [2020-10-28 18:59:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:59:23,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:23,850 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] [2020-10-28 18:59:23,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:59:23,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1856263526, now seen corresponding path program 1 times [2020-10-28 18:59:23,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:23,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94406166] [2020-10-28 18:59:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:28,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:59:28,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:59:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:59:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:28,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:59:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:59:28,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:33,887 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 18:59:33,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:33,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:33,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:33,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:33,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:33,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:59:33,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:33,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:33,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:33,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94406166] [2020-10-28 18:59:33,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:33,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:59:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226616820] [2020-10-28 18:59:33,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:33,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:33,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:33,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:33,990 INFO L87 Difference]: Start difference. First operand 2176 states and 2930 transitions. Second operand 8 states. [2020-10-28 18:59:38,864 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 18:59:49,955 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 18:59:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:51,862 INFO L93 Difference]: Finished difference Result 3584 states and 4996 transitions. [2020-10-28 18:59:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:59:51,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 18:59:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:51,873 INFO L225 Difference]: With dead ends: 3584 [2020-10-28 18:59:51,873 INFO L226 Difference]: Without dead ends: 2142 [2020-10-28 18:59:51,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:59:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2020-10-28 18:59:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1692. [2020-10-28 18:59:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1692 states. [2020-10-28 18:59:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2293 transitions. [2020-10-28 18:59:52,059 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2293 transitions. Word has length 70 [2020-10-28 18:59:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:52,059 INFO L481 AbstractCegarLoop]: Abstraction has 1692 states and 2293 transitions. [2020-10-28 18:59:52,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2293 transitions. [2020-10-28 18:59:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:59:52,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:52,069 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] [2020-10-28 18:59:52,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:59:52,069 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 647062555, now seen corresponding path program 1 times [2020-10-28 18:59:52,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:52,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130195782] [2020-10-28 18:59:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:59:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:59:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:59:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:01,993 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 19:00:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:02,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:02,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130195782] [2020-10-28 19:00:02,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:02,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702759276] [2020-10-28 19:00:02,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:02,110 INFO L87 Difference]: Start difference. First operand 1692 states and 2293 transitions. Second operand 8 states. [2020-10-28 19:00:06,952 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification that was a NOOP. DAG size: 650