/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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:57:47,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:57:47,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:57:47,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:57:47,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:57:47,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:57:47,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:57:47,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:57:47,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:57:47,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:57:47,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:57:47,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:57:47,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:57:47,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:57:47,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:57:47,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:57:47,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:57:47,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:57:47,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:57:47,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:57:47,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:57:47,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:57:47,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:57:47,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:57:47,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:57:47,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:57:47,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:57:47,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:57:47,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:57:47,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:57:47,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:57:47,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:57:47,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:57:47,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:57:47,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:57:47,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:57:47,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:57:47,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:57:47,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:57:47,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:57:47,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:57:47,561 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 18:57:47,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:57:47,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:57:47,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:57:47,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:57:47,614 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:57:47,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:57:47,615 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:57:47,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:57:47,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:57:47,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:57:47,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:57:47,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:57:47,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:57:47,617 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:57:47,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:57:47,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:57:47,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:57:47,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:57:47,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:57:47,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:57:47,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:57:47,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:57:47,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:57:47,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:57:47,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:57:47,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:57:47,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:57:47,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:57:47,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:57:47,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:57:48,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:57:48,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:57:48,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:57:48,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:57:48,085 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:57:48,086 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:57:48,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b692a50a/fdb090f9ec414796a112671341100e0f/FLAG053d5d74a [2020-10-28 18:57:49,096 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:57:49,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:57:49,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b692a50a/fdb090f9ec414796a112671341100e0f/FLAG053d5d74a [2020-10-28 18:57:49,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b692a50a/fdb090f9ec414796a112671341100e0f [2020-10-28 18:57:49,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:57:49,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:57:49,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:57:49,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:57:49,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:57:49,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:57:49" (1/1) ... [2020-10-28 18:57:49,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789ead18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:49, skipping insertion in model container [2020-10-28 18:57:49,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:57:49" (1/1) ... [2020-10-28 18:57:49,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:57:49,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:57:50,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:57:50,959 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:57:51,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:57:51,404 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:57:51,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51 WrapperNode [2020-10-28 18:57:51,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:57:51,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:57:51,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:57:51,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:57:51,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (1/1) ... [2020-10-28 18:57:51,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:57:51,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:57:51,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:57:51,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:57:51,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (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 18:57:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:57:51,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:57:51,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:57:51,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:57:51,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:57:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:57:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:57:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:57:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:57:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:57:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:57:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:57:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:57:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:57:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:57:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:57:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:57:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:57:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:57:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:57:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:57:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:57:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:57:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:57:55,881 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:57:55,881 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:57:55,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:57:55 BoogieIcfgContainer [2020-10-28 18:57:55,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:57:55,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:57:55,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:57:55,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:57:55,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:57:49" (1/3) ... [2020-10-28 18:57:55,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6645f48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:57:55, skipping insertion in model container [2020-10-28 18:57:55,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:57:51" (2/3) ... [2020-10-28 18:57:55,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6645f48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:57:55, skipping insertion in model container [2020-10-28 18:57:55,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:57:55" (3/3) ... [2020-10-28 18:57:55,894 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:57:55,907 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:57:55,913 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:57:55,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:57:55,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:57:55,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:57:55,963 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:57:55,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:57:55,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:57:55,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:57:55,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:57:55,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:57:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states. [2020-10-28 18:57:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:57:56,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:56,032 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] [2020-10-28 18:57:56,032 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 309893165, now seen corresponding path program 1 times [2020-10-28 18:57:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509180757] [2020-10-28 18:57:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:57,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:57,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:57,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:57,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:01,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:58:01,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:58:01,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 18:58:01,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:01,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:58:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:58:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:58:04,774 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 18:58:04,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:04,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:04,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:04,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:04,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:58:04,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:04,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:04,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:04,919 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 18:58:04,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509180757] [2020-10-28 18:58:04,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:04,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:58:04,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953704771] [2020-10-28 18:58:04,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:04,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:04,946 INFO L87 Difference]: Start difference. First operand 1111 states. Second operand 8 states. [2020-10-28 18:58:07,857 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 644 [2020-10-28 18:58:29,645 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 645 [2020-10-28 18:58:32,385 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 637 [2020-10-28 18:58:35,040 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 637 [2020-10-28 18:58:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:37,232 INFO L93 Difference]: Finished difference Result 3123 states and 5407 transitions. [2020-10-28 18:58:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 18:58:37,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-28 18:58:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:37,281 INFO L225 Difference]: With dead ends: 3123 [2020-10-28 18:58:37,282 INFO L226 Difference]: Without dead ends: 2894 [2020-10-28 18:58:37,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-10-28 18:58:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2020-10-28 18:58:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1215. [2020-10-28 18:58:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2020-10-28 18:58:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1581 transitions. [2020-10-28 18:58:37,485 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1581 transitions. Word has length 68 [2020-10-28 18:58:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:37,488 INFO L481 AbstractCegarLoop]: Abstraction has 1215 states and 1581 transitions. [2020-10-28 18:58:37,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:58:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1581 transitions. [2020-10-28 18:58:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:58:37,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:37,506 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] [2020-10-28 18:58:37,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:58:37,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash -264116938, now seen corresponding path program 1 times [2020-10-28 18:58:37,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:37,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135102535] [2020-10-28 18:58:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 18:58:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:58:42,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:45,267 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 18:58:45,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:45,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:45,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:45,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:45,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:45,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:45,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:45,391 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 18:58:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135102535] [2020-10-28 18:58:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:45,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221844463] [2020-10-28 18:58:45,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:45,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:45,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:45,398 INFO L87 Difference]: Start difference. First operand 1215 states and 1581 transitions. Second operand 4 states. [2020-10-28 18:58:48,018 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 629 [2020-10-28 18:58:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:56,971 INFO L93 Difference]: Finished difference Result 1595 states and 2154 transitions. [2020-10-28 18:58:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:56,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:58:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:56,980 INFO L225 Difference]: With dead ends: 1595 [2020-10-28 18:58:56,980 INFO L226 Difference]: Without dead ends: 1391 [2020-10-28 18:58:56,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-10-28 18:58:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1385. [2020-10-28 18:58:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-10-28 18:58:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1833 transitions. [2020-10-28 18:58:57,053 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1833 transitions. Word has length 68 [2020-10-28 18:58:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:57,054 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 1833 transitions. [2020-10-28 18:58:57,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1833 transitions. [2020-10-28 18:58:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:58:57,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:57,059 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] [2020-10-28 18:58:57,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:58:57,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:57,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1287109209, now seen corresponding path program 1 times [2020-10-28 18:58:57,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:57,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309074133] [2020-10-28 18:58:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:02,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:02,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:59:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:59:02,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:02,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:59:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:59:02,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:59:02,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:04,854 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 18:59:04,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:04,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:04,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:59:04,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:04,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:04,962 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 18:59:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309074133] [2020-10-28 18:59:04,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:04,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883615851] [2020-10-28 18:59:04,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:59:04,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:59:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:59:04,966 INFO L87 Difference]: Start difference. First operand 1385 states and 1833 transitions. Second operand 7 states. [2020-10-28 18:59:07,693 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 631 [2020-10-28 18:59:18,654 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 633 [2020-10-28 18:59:22,700 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 632 [2020-10-28 18:59:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:22,850 INFO L93 Difference]: Finished difference Result 2948 states and 4195 transitions. [2020-10-28 18:59:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:59:22,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 18:59:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:22,865 INFO L225 Difference]: With dead ends: 2948 [2020-10-28 18:59:22,866 INFO L226 Difference]: Without dead ends: 2544 [2020-10-28 18:59:22,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:59:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2020-10-28 18:59:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1588. [2020-10-28 18:59:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2020-10-28 18:59:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2117 transitions. [2020-10-28 18:59:22,974 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2117 transitions. Word has length 68 [2020-10-28 18:59:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:22,975 INFO L481 AbstractCegarLoop]: Abstraction has 1588 states and 2117 transitions. [2020-10-28 18:59:22,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:59:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2117 transitions. [2020-10-28 18:59:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:22,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:22,979 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] [2020-10-28 18:59:22,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:59:22,980 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1787215120, now seen corresponding path program 1 times [2020-10-28 18:59:22,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:22,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852003390] [2020-10-28 18:59:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:28,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:28,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:59:28,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 18:59:28,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:28,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:28,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:28,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 18:59:28,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:59:28,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:59:30,766 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 18:59:30,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:30,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:30,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:30,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:59:30,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:30,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:30,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:30,865 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 18:59:30,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852003390] [2020-10-28 18:59:30,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:30,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99580695] [2020-10-28 18:59:30,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:30,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:30,870 INFO L87 Difference]: Start difference. First operand 1588 states and 2117 transitions. Second operand 4 states. [2020-10-28 18:59:33,703 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 629 [2020-10-28 18:59:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:43,161 INFO L93 Difference]: Finished difference Result 2541 states and 3520 transitions. [2020-10-28 18:59:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:43,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:59:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:43,172 INFO L225 Difference]: With dead ends: 2541 [2020-10-28 18:59:43,172 INFO L226 Difference]: Without dead ends: 2070 [2020-10-28 18:59:43,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2020-10-28 18:59:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 2062. [2020-10-28 18:59:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-28 18:59:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2800 transitions. [2020-10-28 18:59:43,265 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2800 transitions. Word has length 68 [2020-10-28 18:59:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:43,266 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 2800 transitions. [2020-10-28 18:59:43,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2800 transitions. [2020-10-28 18:59:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:43,270 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] [2020-10-28 18:59:43,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:59:43,271 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -201811057, now seen corresponding path program 1 times [2020-10-28 18:59:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:43,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220056396] [2020-10-28 18:59:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:48,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:48,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:59:48,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:50,939 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 18:59:50,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:51,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:51,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:51,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:51,119 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 18:59:51,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220056396] [2020-10-28 18:59:51,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:51,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:59:51,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304521507] [2020-10-28 18:59:51,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:59:51,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:59:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:51,123 INFO L87 Difference]: Start difference. First operand 2062 states and 2800 transitions. Second operand 6 states. [2020-10-28 18:59:53,776 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 631 [2020-10-28 19:00:03,267 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 630 [2020-10-28 19:00:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:04,278 INFO L93 Difference]: Finished difference Result 3265 states and 4511 transitions. [2020-10-28 19:00:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:00:04,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-28 19:00:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:04,286 INFO L225 Difference]: With dead ends: 3265 [2020-10-28 19:00:04,286 INFO L226 Difference]: Without dead ends: 2037 [2020-10-28 19:00:04,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:00:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-10-28 19:00:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1959. [2020-10-28 19:00:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2020-10-28 19:00:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2654 transitions. [2020-10-28 19:00:04,415 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2654 transitions. Word has length 68 [2020-10-28 19:00:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:04,415 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 2654 transitions. [2020-10-28 19:00:04,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2654 transitions. [2020-10-28 19:00:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 19:00:04,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:04,419 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] [2020-10-28 19:00:04,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:00:04,420 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1676130584, now seen corresponding path program 1 times [2020-10-28 19:00:04,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:04,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921217861] [2020-10-28 19:00:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:04,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:09,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:09,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 19:00:09,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 19:00:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:12,124 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 19:00:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:12,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:12,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:12,206 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 19:00:12,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921217861] [2020-10-28 19:00:12,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:12,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:00:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073725132] [2020-10-28 19:00:12,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:12,208 INFO L87 Difference]: Start difference. First operand 1959 states and 2654 transitions. Second operand 8 states. [2020-10-28 19:00:14,855 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 631 [2020-10-28 19:00:24,608 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 633 [2020-10-28 19:00:27,339 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 627 [2020-10-28 19:00:31,268 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 632 [2020-10-28 19:00:33,971 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 626 [2020-10-28 19:00:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:34,320 INFO L93 Difference]: Finished difference Result 11407 states and 16882 transitions. [2020-10-28 19:00:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 19:00:34,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-28 19:00:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:34,356 INFO L225 Difference]: With dead ends: 11407 [2020-10-28 19:00:34,356 INFO L226 Difference]: Without dead ends: 10478 [2020-10-28 19:00:34,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:00:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10478 states. [2020-10-28 19:00:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10478 to 2011. [2020-10-28 19:00:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2011 states. [2020-10-28 19:00:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2702 transitions. [2020-10-28 19:00:34,591 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2702 transitions. Word has length 68 [2020-10-28 19:00:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:34,591 INFO L481 AbstractCegarLoop]: Abstraction has 2011 states and 2702 transitions. [2020-10-28 19:00:34,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2702 transitions. [2020-10-28 19:00:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:00:34,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:34,596 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 19:00:34,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:00:34,596 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1426052083, now seen corresponding path program 1 times [2020-10-28 19:00:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:34,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680116851] [2020-10-28 19:00:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:34,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:37,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:37,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:00:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:42,213 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 19:00:42,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:42,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:42,305 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 19:00:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680116851] [2020-10-28 19:00:42,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:42,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:42,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056505113] [2020-10-28 19:00:42,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:42,307 INFO L87 Difference]: Start difference. First operand 2011 states and 2702 transitions. Second operand 8 states. [2020-10-28 19:00:44,906 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 629 [2020-10-28 19:00:54,484 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 631 [2020-10-28 19:00:59,259 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 630 [2020-10-28 19:00:59,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:59,611 INFO L93 Difference]: Finished difference Result 6684 states and 9702 transitions. [2020-10-28 19:00:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 19:00:59,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 19:00:59,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:59,635 INFO L225 Difference]: With dead ends: 6684 [2020-10-28 19:00:59,635 INFO L226 Difference]: Without dead ends: 5771 [2020-10-28 19:00:59,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 19:00:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-10-28 19:00:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 2019. [2020-10-28 19:00:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2019 states. [2020-10-28 19:00:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2710 transitions. [2020-10-28 19:00:59,823 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2710 transitions. Word has length 69 [2020-10-28 19:00:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:59,824 INFO L481 AbstractCegarLoop]: Abstraction has 2019 states and 2710 transitions. [2020-10-28 19:00:59,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2710 transitions. [2020-10-28 19:00:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:00:59,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:59,828 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 19:00:59,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:00:59,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash 848476852, now seen corresponding path program 1 times [2020-10-28 19:00:59,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:59,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706956119] [2020-10-28 19:00:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:02,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:01:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:01:04,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:07,676 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 625 [2020-10-28 19:01:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:07,765 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 19:01:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706956119] [2020-10-28 19:01:07,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:07,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:01:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914477814] [2020-10-28 19:01:07,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:01:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:01:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:01:07,767 INFO L87 Difference]: Start difference. First operand 2019 states and 2710 transitions. Second operand 8 states. [2020-10-28 19:01:10,481 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 638 [2020-10-28 19:01:20,274 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 637 [2020-10-28 19:01:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:22,243 INFO L93 Difference]: Finished difference Result 3265 states and 4561 transitions. [2020-10-28 19:01:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 19:01:22,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 19:01:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:22,250 INFO L225 Difference]: With dead ends: 3265 [2020-10-28 19:01:22,250 INFO L226 Difference]: Without dead ends: 2415 [2020-10-28 19:01:22,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:01:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2020-10-28 19:01:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1882. [2020-10-28 19:01:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-10-28 19:01:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2507 transitions. [2020-10-28 19:01:22,417 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2507 transitions. Word has length 69 [2020-10-28 19:01:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:22,417 INFO L481 AbstractCegarLoop]: Abstraction has 1882 states and 2507 transitions. [2020-10-28 19:01:22,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:01:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2507 transitions. [2020-10-28 19:01:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:01:22,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:22,422 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 19:01:22,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:01:22,422 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1171690515, now seen corresponding path program 1 times [2020-10-28 19:01:22,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:22,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571997337] [2020-10-28 19:01:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:22,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:23,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:27,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:27,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:01:27,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:01:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:01:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0