/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_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:18:03,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:18:03,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:18:03,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:18:03,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:18:03,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:18:03,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:18:03,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:18:03,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:18:03,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:18:03,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:18:03,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:18:03,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:18:03,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:18:03,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:18:03,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:18:03,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:18:03,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:18:03,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:18:03,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:18:03,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:18:03,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:18:03,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:18:03,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:18:03,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:18:03,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:18:03,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:18:03,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:18:03,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:18:03,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:18:03,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:18:03,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:18:03,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:18:03,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:18:03,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:18:03,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:18:03,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:18:03,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:18:03,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:18:03,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:18:03,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:18:03,521 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 18:18:03,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:18:03,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:18:03,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:18:03,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:18:03,551 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:18:03,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:18:03,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:18:03,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:18:03,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:18:03,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:18:03,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:18:03,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:18:03,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:18:03,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:18:03,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:18:03,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:18:03,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:18:03,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:18:03,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:18:03,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:18:03,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:18:03,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:18:03,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:18:03,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:18:03,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:18:03,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:18:03,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:18:03,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:18:03,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:18:03,945 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:18:03,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:18:04,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36ee2c4de/0e98775276984bb1831a4d867bc0ba54/FLAG623d09404 [2020-10-28 18:18:04,798 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:18:04,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:18:04,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36ee2c4de/0e98775276984bb1831a4d867bc0ba54/FLAG623d09404 [2020-10-28 18:18:05,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36ee2c4de/0e98775276984bb1831a4d867bc0ba54 [2020-10-28 18:18:05,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:18:05,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:18:05,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:18:05,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:18:05,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:18:05,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:05,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c55cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05, skipping insertion in model container [2020-10-28 18:18:05,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:05,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:18:05,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:18:05,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:18:05,683 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:18:05,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:18:05,934 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:18:05,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05 WrapperNode [2020-10-28 18:18:05,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:18:05,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:18:05,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:18:05,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:18:05,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:05,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:05,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:05,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:06,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:06,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:06,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (1/1) ... [2020-10-28 18:18:06,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:18:06,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:18:06,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:18:06,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:18:06,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (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 18:18:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:18:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:18:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:18:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:18:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:18:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:18:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:18:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:18:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:18:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:18:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:18:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:18:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:18:07,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:18:07,825 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:18:07,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:18:07 BoogieIcfgContainer [2020-10-28 18:18:07,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:18:07,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:18:07,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:18:07,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:18:07,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:18:05" (1/3) ... [2020-10-28 18:18:07,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abd0f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:18:07, skipping insertion in model container [2020-10-28 18:18:07,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:18:05" (2/3) ... [2020-10-28 18:18:07,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abd0f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:18:07, skipping insertion in model container [2020-10-28 18:18:07,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:18:07" (3/3) ... [2020-10-28 18:18:07,837 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:18:07,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:18:07,856 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:18:07,870 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:18:07,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:18:07,902 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:18:07,902 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:18:07,902 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:18:07,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:18:07,903 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:18:07,903 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:18:07,903 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:18:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states. [2020-10-28 18:18:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 18:18:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:07,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:07,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash -655812944, now seen corresponding path program 1 times [2020-10-28 18:18:07,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:07,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329310729] [2020-10-28 18:18:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:08,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:10,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:10,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:13,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:13,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 18:18:13,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:18:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 18:18:13,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:13,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:13,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:13,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:18:13,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:18:13,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:18:14,324 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:14,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:14,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:14,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:14,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:14,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:18:14,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:14,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:14,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:14,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:14,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329310729] [2020-10-28 18:18:14,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:14,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:14,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505379272] [2020-10-28 18:18:14,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:14,493 INFO L87 Difference]: Start difference. First operand 335 states. Second operand 4 states. [2020-10-28 18:18:15,316 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:18:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:17,871 INFO L93 Difference]: Finished difference Result 604 states and 1040 transitions. [2020-10-28 18:18:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:17,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 18:18:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:17,901 INFO L225 Difference]: With dead ends: 604 [2020-10-28 18:18:17,902 INFO L226 Difference]: Without dead ends: 454 [2020-10-28 18:18:17,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-28 18:18:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2020-10-28 18:18:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-28 18:18:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 747 transitions. [2020-10-28 18:18:18,011 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 747 transitions. Word has length 115 [2020-10-28 18:18:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:18,016 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 747 transitions. [2020-10-28 18:18:18,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 747 transitions. [2020-10-28 18:18:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 18:18:18,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:18,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:18,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:18:18,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash 218164955, now seen corresponding path program 1 times [2020-10-28 18:18:18,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:18,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29735424] [2020-10-28 18:18:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:18,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:19,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:23,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:23,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:18:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:23,818 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:23,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:23,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:23,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:23,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:23,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:18:23,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:23,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:23,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:23,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:23,918 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 18:18:23,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29735424] [2020-10-28 18:18:23,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:23,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105139272] [2020-10-28 18:18:23,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:23,922 INFO L87 Difference]: Start difference. First operand 450 states and 747 transitions. Second operand 5 states. [2020-10-28 18:18:27,165 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:27,322 INFO L93 Difference]: Finished difference Result 1282 states and 2126 transitions. [2020-10-28 18:18:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:27,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-28 18:18:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:27,337 INFO L225 Difference]: With dead ends: 1282 [2020-10-28 18:18:27,337 INFO L226 Difference]: Without dead ends: 867 [2020-10-28 18:18:27,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-10-28 18:18:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 864. [2020-10-28 18:18:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-10-28 18:18:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1427 transitions. [2020-10-28 18:18:27,454 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1427 transitions. Word has length 118 [2020-10-28 18:18:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:27,455 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1427 transitions. [2020-10-28 18:18:27,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1427 transitions. [2020-10-28 18:18:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 18:18:27,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:27,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:27,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:18:27,467 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1567456017, now seen corresponding path program 1 times [2020-10-28 18:18:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:27,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587914109] [2020-10-28 18:18:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:27,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:32,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:32,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:18:32,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:33,347 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:33,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:33,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:33,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:33,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:33,460 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 18:18:33,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587914109] [2020-10-28 18:18:33,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:33,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:33,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440042826] [2020-10-28 18:18:33,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:33,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:33,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:33,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:33,465 INFO L87 Difference]: Start difference. First operand 864 states and 1427 transitions. Second operand 5 states. [2020-10-28 18:18:36,569 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:36,719 INFO L93 Difference]: Finished difference Result 2468 states and 4066 transitions. [2020-10-28 18:18:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:36,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 18:18:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:36,731 INFO L225 Difference]: With dead ends: 2468 [2020-10-28 18:18:36,731 INFO L226 Difference]: Without dead ends: 1669 [2020-10-28 18:18:36,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-10-28 18:18:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1666. [2020-10-28 18:18:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-10-28 18:18:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2733 transitions. [2020-10-28 18:18:36,837 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2733 transitions. Word has length 120 [2020-10-28 18:18:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:36,837 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2733 transitions. [2020-10-28 18:18:36,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2733 transitions. [2020-10-28 18:18:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 18:18:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:36,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:36,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:18:36,843 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:36,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1088885358, now seen corresponding path program 1 times [2020-10-28 18:18:36,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:36,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649823258] [2020-10-28 18:18:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:37,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:37,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:38,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:41,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:41,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 18:18:41,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:41,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:18:41,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:41,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:41,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:41,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:41,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 18:18:41,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:42,650 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:42,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:42,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:42,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:42,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:42,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:42,750 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 18:18:42,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649823258] [2020-10-28 18:18:42,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:42,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112655008] [2020-10-28 18:18:42,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:42,753 INFO L87 Difference]: Start difference. First operand 1666 states and 2733 transitions. Second operand 5 states. [2020-10-28 18:18:46,228 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:46,403 INFO L93 Difference]: Finished difference Result 4742 states and 7759 transitions. [2020-10-28 18:18:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:46,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 18:18:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:46,425 INFO L225 Difference]: With dead ends: 4742 [2020-10-28 18:18:46,425 INFO L226 Difference]: Without dead ends: 3275 [2020-10-28 18:18:46,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2020-10-28 18:18:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3272. [2020-10-28 18:18:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3272 states. [2020-10-28 18:18:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5346 transitions. [2020-10-28 18:18:46,686 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5346 transitions. Word has length 120 [2020-10-28 18:18:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:46,687 INFO L481 AbstractCegarLoop]: Abstraction has 3272 states and 5346 transitions. [2020-10-28 18:18:46,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5346 transitions. [2020-10-28 18:18:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 18:18:46,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:46,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:46,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:18:46,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1322661421, now seen corresponding path program 1 times [2020-10-28 18:18:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:46,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868698730] [2020-10-28 18:18:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:47,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:47,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:51,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:18:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:52,497 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:18:52,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:52,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:52,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:52,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:52,582 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 18:18:52,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868698730] [2020-10-28 18:18:52,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:52,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161712354] [2020-10-28 18:18:52,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:52,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:52,584 INFO L87 Difference]: Start difference. First operand 3272 states and 5346 transitions. Second operand 5 states. [2020-10-28 18:18:55,537 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:18:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:55,742 INFO L93 Difference]: Finished difference Result 9510 states and 15508 transitions. [2020-10-28 18:18:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:55,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-28 18:18:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:55,778 INFO L225 Difference]: With dead ends: 9510 [2020-10-28 18:18:55,778 INFO L226 Difference]: Without dead ends: 6357 [2020-10-28 18:18:55,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2020-10-28 18:18:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 6354. [2020-10-28 18:18:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-10-28 18:18:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 10308 transitions. [2020-10-28 18:18:56,244 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 10308 transitions. Word has length 121 [2020-10-28 18:18:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:56,244 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 10308 transitions. [2020-10-28 18:18:56,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 10308 transitions. [2020-10-28 18:18:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 18:18:56,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:56,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:56,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:18:56,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1086352798, now seen corresponding path program 1 times [2020-10-28 18:18:56,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:56,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804142640] [2020-10-28 18:18:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:56,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:56,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:56,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:56,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:56,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:19:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:02,089 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:02,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:02,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:02,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:02,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:02,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:02,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:19:02,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:02,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:02,186 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 18:19:02,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804142640] [2020-10-28 18:19:02,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:02,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:02,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331465782] [2020-10-28 18:19:02,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:02,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:02,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:02,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:02,190 INFO L87 Difference]: Start difference. First operand 6354 states and 10308 transitions. Second operand 5 states. [2020-10-28 18:19:05,389 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:19:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:05,642 INFO L93 Difference]: Finished difference Result 18367 states and 29775 transitions. [2020-10-28 18:19:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:05,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 18:19:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:05,703 INFO L225 Difference]: With dead ends: 18367 [2020-10-28 18:19:05,703 INFO L226 Difference]: Without dead ends: 12040 [2020-10-28 18:19:05,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2020-10-28 18:19:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 12037. [2020-10-28 18:19:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12037 states. [2020-10-28 18:19:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12037 states to 12037 states and 19411 transitions. [2020-10-28 18:19:06,682 INFO L78 Accepts]: Start accepts. Automaton has 12037 states and 19411 transitions. Word has length 122 [2020-10-28 18:19:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:06,682 INFO L481 AbstractCegarLoop]: Abstraction has 12037 states and 19411 transitions. [2020-10-28 18:19:06,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 12037 states and 19411 transitions. [2020-10-28 18:19:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 18:19:06,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:06,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:06,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:19:06,705 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1945204996, now seen corresponding path program 1 times [2020-10-28 18:19:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:06,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667914300] [2020-10-28 18:19:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:06,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:06,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:07,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:07,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:07,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:11,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:11,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 18:19:11,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:19:11,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:19:11,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:11,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:11,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 18:19:11,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:12,401 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:12,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:12,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:12,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:12,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:12,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:12,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:12,478 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 18:19:12,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667914300] [2020-10-28 18:19:12,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:12,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:12,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359625704] [2020-10-28 18:19:12,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:12,480 INFO L87 Difference]: Start difference. First operand 12037 states and 19411 transitions. Second operand 5 states. [2020-10-28 18:19:15,976 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:19:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:16,481 INFO L93 Difference]: Finished difference Result 34805 states and 56041 transitions. [2020-10-28 18:19:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:16,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-28 18:19:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:16,539 INFO L225 Difference]: With dead ends: 34805 [2020-10-28 18:19:16,540 INFO L226 Difference]: Without dead ends: 23333 [2020-10-28 18:19:16,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23333 states. [2020-10-28 18:19:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23333 to 23330. [2020-10-28 18:19:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23330 states. [2020-10-28 18:19:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23330 states to 23330 states and 37305 transitions. [2020-10-28 18:19:17,978 INFO L78 Accepts]: Start accepts. Automaton has 23330 states and 37305 transitions. Word has length 122 [2020-10-28 18:19:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:17,978 INFO L481 AbstractCegarLoop]: Abstraction has 23330 states and 37305 transitions. [2020-10-28 18:19:17,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 23330 states and 37305 transitions. [2020-10-28 18:19:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 18:19:18,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:18,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:18,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:19:18,022 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 425652581, now seen corresponding path program 1 times [2020-10-28 18:19:18,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:18,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753195188] [2020-10-28 18:19:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:23,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:23,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 18:19:23,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:19:23,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:19:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:23,774 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:23,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:23,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:23,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:23,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:23,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:23,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:23,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:23,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:23,828 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 18:19:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753195188] [2020-10-28 18:19:23,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:23,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:23,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091230835] [2020-10-28 18:19:23,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:23,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:23,831 INFO L87 Difference]: Start difference. First operand 23330 states and 37305 transitions. Second operand 4 states. [2020-10-28 18:19:24,484 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-28 18:19:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:28,261 INFO L93 Difference]: Finished difference Result 51112 states and 83517 transitions. [2020-10-28 18:19:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:28,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-28 18:19:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:28,355 INFO L225 Difference]: With dead ends: 51112 [2020-10-28 18:19:28,355 INFO L226 Difference]: Without dead ends: 36677 [2020-10-28 18:19:28,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36677 states. [2020-10-28 18:19:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36677 to 36546. [2020-10-28 18:19:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36546 states. [2020-10-28 18:19:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36546 states to 36546 states and 59033 transitions. [2020-10-28 18:19:30,961 INFO L78 Accepts]: Start accepts. Automaton has 36546 states and 59033 transitions. Word has length 123 [2020-10-28 18:19:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:30,961 INFO L481 AbstractCegarLoop]: Abstraction has 36546 states and 59033 transitions. [2020-10-28 18:19:30,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36546 states and 59033 transitions. [2020-10-28 18:19:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 18:19:30,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:30,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:30,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:19:30,998 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1805950354, now seen corresponding path program 1 times [2020-10-28 18:19:31,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:31,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648957313] [2020-10-28 18:19:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:36,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 18:19:36,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:19:36,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:19:36,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:36,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:19:36,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:36,809 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:36,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:36,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:36,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:36,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:36,879 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 18:19:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648957313] [2020-10-28 18:19:36,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:36,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307857318] [2020-10-28 18:19:36,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:36,881 INFO L87 Difference]: Start difference. First operand 36546 states and 59033 transitions. Second operand 5 states. [2020-10-28 18:19:42,175 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:19:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:44,714 INFO L93 Difference]: Finished difference Result 106664 states and 172306 transitions. [2020-10-28 18:19:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:44,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 18:19:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:44,841 INFO L225 Difference]: With dead ends: 106664 [2020-10-28 18:19:44,841 INFO L226 Difference]: Without dead ends: 71653 [2020-10-28 18:19:44,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71653 states. [2020-10-28 18:19:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71653 to 71650. [2020-10-28 18:19:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71650 states. [2020-10-28 18:19:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71650 states to 71650 states and 115086 transitions. [2020-10-28 18:19:50,400 INFO L78 Accepts]: Start accepts. Automaton has 71650 states and 115086 transitions. Word has length 127 [2020-10-28 18:19:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:50,401 INFO L481 AbstractCegarLoop]: Abstraction has 71650 states and 115086 transitions. [2020-10-28 18:19:50,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 71650 states and 115086 transitions. [2020-10-28 18:19:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 18:19:50,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:50,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:50,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:19:50,444 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash -53603430, now seen corresponding path program 1 times [2020-10-28 18:19:50,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:50,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377167751] [2020-10-28 18:19:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:50,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:50,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:51,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:55,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 18:19:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:56,221 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:19:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:56,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:56,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:56,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:56,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:56,279 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 18:19:56,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377167751] [2020-10-28 18:19:56,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885830683] [2020-10-28 18:19:56,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:56,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:56,281 INFO L87 Difference]: Start difference. First operand 71650 states and 115086 transitions. Second operand 5 states. [2020-10-28 18:20:02,872 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:20:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:08,789 INFO L93 Difference]: Finished difference Result 212114 states and 340820 transitions. [2020-10-28 18:20:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:08,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-28 18:20:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:09,200 INFO L225 Difference]: With dead ends: 212114 [2020-10-28 18:20:09,200 INFO L226 Difference]: Without dead ends: 140594 [2020-10-28 18:20:09,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140594 states. [2020-10-28 18:20:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140594 to 140591. [2020-10-28 18:20:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140591 states. [2020-10-28 18:20:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140591 states to 140591 states and 224840 transitions. [2020-10-28 18:20:19,916 INFO L78 Accepts]: Start accepts. Automaton has 140591 states and 224840 transitions. Word has length 129 [2020-10-28 18:20:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:19,916 INFO L481 AbstractCegarLoop]: Abstraction has 140591 states and 224840 transitions. [2020-10-28 18:20:19,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 140591 states and 224840 transitions. [2020-10-28 18:20:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 18:20:20,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:20,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:20,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:20:20,010 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash -295009325, now seen corresponding path program 1 times [2020-10-28 18:20:20,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:20,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294255583] [2020-10-28 18:20:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:20,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:25,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:25,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 18:20:25,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:20:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:20:25,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:25,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 18:20:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:26,135 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:20:26,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:26,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:26,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:26,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:26,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:20:26,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:26,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:26,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:26,230 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 18:20:26,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294255583] [2020-10-28 18:20:26,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:26,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:26,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888133359] [2020-10-28 18:20:26,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:26,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:26,233 INFO L87 Difference]: Start difference. First operand 140591 states and 224840 transitions. Second operand 5 states. [2020-10-28 18:20:37,752 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-28 18:20:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:52,368 INFO L93 Difference]: Finished difference Result 408287 states and 652678 transitions. [2020-10-28 18:20:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:52,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-28 18:20:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:52,914 INFO L225 Difference]: With dead ends: 408287 [2020-10-28 18:20:52,914 INFO L226 Difference]: Without dead ends: 274908 [2020-10-28 18:20:53,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274908 states. [2020-10-28 18:21:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274908 to 274905. [2020-10-28 18:21:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274905 states. [2020-10-28 18:21:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274905 states to 274905 states and 436994 transitions. [2020-10-28 18:21:17,845 INFO L78 Accepts]: Start accepts. Automaton has 274905 states and 436994 transitions. Word has length 129 [2020-10-28 18:21:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:17,846 INFO L481 AbstractCegarLoop]: Abstraction has 274905 states and 436994 transitions. [2020-10-28 18:21:17,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 274905 states and 436994 transitions. [2020-10-28 18:21:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 18:21:17,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:17,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:17,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:21:17,975 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 19920705, now seen corresponding path program 1 times [2020-10-28 18:21:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:17,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610967396] [2020-10-28 18:21:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:18,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:18,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:18,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:23,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:23,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 18:21:23,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:21:23,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 18:21:23,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:23,754 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-28 18:21:23,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:23,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:23,834 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 18:21:23,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610967396] [2020-10-28 18:21:23,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:23,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:23,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298652236] [2020-10-28 18:21:23,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:23,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:23,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:23,837 INFO L87 Difference]: Start difference. First operand 274905 states and 436994 transitions. Second operand 5 states.