/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:54:06,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:54:06,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:54:07,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:54:07,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:54:07,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:54:07,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:54:07,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:54:07,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:54:07,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:54:07,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:54:07,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:54:07,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:54:07,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:54:07,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:54:07,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:54:07,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:54:07,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:54:07,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:54:07,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:54:07,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:54:07,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:54:07,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:54:07,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:54:07,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:54:07,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:54:07,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:54:07,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:54:07,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:54:07,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:54:07,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:54:07,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:54:07,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:54:07,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:54:07,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:54:07,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:54:07,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:54:07,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:54:07,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:54:07,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:54:07,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:54:07,095 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 18:54:07,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:54:07,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:54:07,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:54:07,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:54:07,126 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:54:07,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:54:07,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:54:07,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:54:07,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:54:07,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:54:07,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:54:07,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:54:07,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:54:07,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:54:07,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:54:07,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:54:07,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:54:07,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:54:07,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:54:07,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:54:07,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:54:07,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:07,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:54:07,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:54:07,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:54:07,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:54:07,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:54:07,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:54:07,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:54:07,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:54:07,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:54:07,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:54:07,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:54:07,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:54:07,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:54:07,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:54:07,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e732575b/a1c75fdcd3854dfe8cce96c0b35d204e/FLAGf5a0d354a [2020-10-28 18:54:08,693 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:54:08,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:54:08,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e732575b/a1c75fdcd3854dfe8cce96c0b35d204e/FLAGf5a0d354a [2020-10-28 18:54:09,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e732575b/a1c75fdcd3854dfe8cce96c0b35d204e [2020-10-28 18:54:09,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:54:09,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:54:09,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:09,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:54:09,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:54:09,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:09" (1/1) ... [2020-10-28 18:54:09,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6326308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:09, skipping insertion in model container [2020-10-28 18:54:09,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:09" (1/1) ... [2020-10-28 18:54:09,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:54:09,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:54:10,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:10,377 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:54:10,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:10,671 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:54:10,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10 WrapperNode [2020-10-28 18:54:10,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:10,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:54:10,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:54:10,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:54:10,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (1/1) ... [2020-10-28 18:54:10,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:54:10,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:54:10,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:54:10,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:54:10,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (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 18:54:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:54:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:54:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:54:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:54:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:54:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:54:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:54:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:54:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:54:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:54:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:54:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:54:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:54:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:54:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:54:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:54:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:54:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:54:16,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:54:16,052 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:54:16,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:16 BoogieIcfgContainer [2020-10-28 18:54:16,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:54:16,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:54:16,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:54:16,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:54:16,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:54:09" (1/3) ... [2020-10-28 18:54:16,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ecb688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:16, skipping insertion in model container [2020-10-28 18:54:16,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:10" (2/3) ... [2020-10-28 18:54:16,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ecb688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:16, skipping insertion in model container [2020-10-28 18:54:16,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:16" (3/3) ... [2020-10-28 18:54:16,067 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:54:16,080 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:54:16,086 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:54:16,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:54:16,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:54:16,135 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:54:16,135 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:54:16,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:54:16,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:54:16,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:54:16,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:54:16,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:54:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states. [2020-10-28 18:54:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:16,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:16,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:16,199 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash -966739044, now seen corresponding path program 1 times [2020-10-28 18:54:16,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:16,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436449842] [2020-10-28 18:54:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:16,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:16,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:18,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:19,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:21,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:21,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:54:21,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:54:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-28 18:54:21,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:21,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:54:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:54:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:54:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:54:23,763 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:54:23,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:23,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:23,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:23,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:23,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:23,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:54:23,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:23,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:23,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:23,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:23,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:23,860 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 18:54:23,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436449842] [2020-10-28 18:54:23,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:23,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:54:23,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487460203] [2020-10-28 18:54:23,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:54:23,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:23,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:54:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:54:23,891 INFO L87 Difference]: Start difference. First operand 1130 states. Second operand 8 states. [2020-10-28 18:54:25,613 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:54:35,982 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:54:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:38,354 INFO L93 Difference]: Finished difference Result 1837 states and 3214 transitions. [2020-10-28 18:54:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:54:38,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:54:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:38,391 INFO L225 Difference]: With dead ends: 1837 [2020-10-28 18:54:38,391 INFO L226 Difference]: Without dead ends: 1312 [2020-10-28 18:54:38,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:54:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-10-28 18:54:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1141. [2020-10-28 18:54:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2020-10-28 18:54:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1504 transitions. [2020-10-28 18:54:38,583 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1504 transitions. Word has length 56 [2020-10-28 18:54:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:38,584 INFO L481 AbstractCegarLoop]: Abstraction has 1141 states and 1504 transitions. [2020-10-28 18:54:38,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:54:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1504 transitions. [2020-10-28 18:54:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:38,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:38,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:38,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:54:38,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -308374435, now seen corresponding path program 1 times [2020-10-28 18:54:38,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:38,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523532304] [2020-10-28 18:54:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:38,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:42,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:43,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:54:43,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:54:43,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 18:54:43,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:43,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:54:43,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:45,365 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:54:45,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:45,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:45,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:45,457 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 18:54:45,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523532304] [2020-10-28 18:54:45,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:45,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:54:45,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029114916] [2020-10-28 18:54:45,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:45,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:45,461 INFO L87 Difference]: Start difference. First operand 1141 states and 1504 transitions. Second operand 6 states. [2020-10-28 18:54:47,121 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:54:54,311 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:54:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:55,605 INFO L93 Difference]: Finished difference Result 1690 states and 2273 transitions. [2020-10-28 18:54:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:54:55,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:54:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:55,613 INFO L225 Difference]: With dead ends: 1690 [2020-10-28 18:54:55,613 INFO L226 Difference]: Without dead ends: 1228 [2020-10-28 18:54:55,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:54:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-10-28 18:54:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1221. [2020-10-28 18:54:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2020-10-28 18:54:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1635 transitions. [2020-10-28 18:54:55,686 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1635 transitions. Word has length 56 [2020-10-28 18:54:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:55,687 INFO L481 AbstractCegarLoop]: Abstraction has 1221 states and 1635 transitions. [2020-10-28 18:54:55,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1635 transitions. [2020-10-28 18:54:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:55,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:55,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:55,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:54:55,692 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 517956793, now seen corresponding path program 1 times [2020-10-28 18:54:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:55,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567458332] [2020-10-28 18:54:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:55,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:56,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:00,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:00,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:00,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:55:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:55:00,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:00,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:00,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:00,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:55:00,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:02,354 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:02,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:02,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:02,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:55:02,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:02,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:02,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:02,423 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 18:55:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567458332] [2020-10-28 18:55:02,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:02,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:55:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686034688] [2020-10-28 18:55:02,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:02,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:02,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:02,426 INFO L87 Difference]: Start difference. First operand 1221 states and 1635 transitions. Second operand 8 states. [2020-10-28 18:55:04,229 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:55:11,486 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:55:13,559 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:55:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:15,619 INFO L93 Difference]: Finished difference Result 2047 states and 2914 transitions. [2020-10-28 18:55:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:15,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:55:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:15,630 INFO L225 Difference]: With dead ends: 2047 [2020-10-28 18:55:15,630 INFO L226 Difference]: Without dead ends: 1810 [2020-10-28 18:55:15,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:55:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2020-10-28 18:55:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1324. [2020-10-28 18:55:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2020-10-28 18:55:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1802 transitions. [2020-10-28 18:55:15,711 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1802 transitions. Word has length 56 [2020-10-28 18:55:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:15,712 INFO L481 AbstractCegarLoop]: Abstraction has 1324 states and 1802 transitions. [2020-10-28 18:55:15,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1802 transitions. [2020-10-28 18:55:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:15,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:15,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:15,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:55:15,716 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1370995832, now seen corresponding path program 1 times [2020-10-28 18:55:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:15,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099718936] [2020-10-28 18:55:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:20,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:20,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:55:20,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:55:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:22,402 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:22,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:22,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:22,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:22,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:55:22,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:22,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:22,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:22,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:22,476 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 18:55:22,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099718936] [2020-10-28 18:55:22,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:22,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:55:22,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466163453] [2020-10-28 18:55:22,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:55:22,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:55:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:55:22,479 INFO L87 Difference]: Start difference. First operand 1324 states and 1802 transitions. Second operand 9 states. [2020-10-28 18:55:24,175 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:55:30,393 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:55:32,499 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:55:36,217 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:55:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:37,397 INFO L93 Difference]: Finished difference Result 4115 states and 6149 transitions. [2020-10-28 18:55:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:55:37,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 18:55:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:37,416 INFO L225 Difference]: With dead ends: 4115 [2020-10-28 18:55:37,416 INFO L226 Difference]: Without dead ends: 3439 [2020-10-28 18:55:37,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:55:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2020-10-28 18:55:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 1815. [2020-10-28 18:55:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1815 states. [2020-10-28 18:55:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2599 transitions. [2020-10-28 18:55:37,557 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2599 transitions. Word has length 57 [2020-10-28 18:55:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:37,557 INFO L481 AbstractCegarLoop]: Abstraction has 1815 states and 2599 transitions. [2020-10-28 18:55:37,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:55:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2599 transitions. [2020-10-28 18:55:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:37,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:37,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:37,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:55:37,561 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash -636135544, now seen corresponding path program 1 times [2020-10-28 18:55:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:37,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185813351] [2020-10-28 18:55:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:37,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:38,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:42,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:42,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:42,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:55:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:55:42,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:42,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:42,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:55:42,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:42,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:55:42,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:44,472 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:55:44,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:44,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:44,550 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 18:55:44,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185813351] [2020-10-28 18:55:44,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:44,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:55:44,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017526110] [2020-10-28 18:55:44,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:55:44,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:55:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:55:44,553 INFO L87 Difference]: Start difference. First operand 1815 states and 2599 transitions. Second operand 10 states. [2020-10-28 18:55:46,463 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:55:52,467 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:55:56,732 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:55:58,518 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:56:00,472 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:56:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:01,675 INFO L93 Difference]: Finished difference Result 8495 states and 12911 transitions. [2020-10-28 18:56:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 18:56:01,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 18:56:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:01,712 INFO L225 Difference]: With dead ends: 8495 [2020-10-28 18:56:01,713 INFO L226 Difference]: Without dead ends: 7299 [2020-10-28 18:56:01,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-28 18:56:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7299 states. [2020-10-28 18:56:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7299 to 2814. [2020-10-28 18:56:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2814 states. [2020-10-28 18:56:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 4092 transitions. [2020-10-28 18:56:02,011 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 4092 transitions. Word has length 57 [2020-10-28 18:56:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:02,011 INFO L481 AbstractCegarLoop]: Abstraction has 2814 states and 4092 transitions. [2020-10-28 18:56:02,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:56:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 4092 transitions. [2020-10-28 18:56:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:56:02,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:02,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:02,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:56:02,015 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -468120866, now seen corresponding path program 1 times [2020-10-28 18:56:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763812320] [2020-10-28 18:56:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:07,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:56:07,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:56:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:56:07,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:08,755 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:08,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:08,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:08,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:08,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 18:56:08,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:08,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:08,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763812320] [2020-10-28 18:56:08,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:08,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836109862] [2020-10-28 18:56:08,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:56:08,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:56:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:56:08,848 INFO L87 Difference]: Start difference. First operand 2814 states and 4092 transitions. Second operand 10 states. [2020-10-28 18:56:10,754 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:56:16,167 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:56:17,819 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:56:21,997 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:56:23,858 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:56:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:25,603 INFO L93 Difference]: Finished difference Result 11051 states and 16854 transitions. [2020-10-28 18:56:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 18:56:25,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 18:56:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:25,645 INFO L225 Difference]: With dead ends: 11051 [2020-10-28 18:56:25,646 INFO L226 Difference]: Without dead ends: 9190 [2020-10-28 18:56:25,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-28 18:56:25,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9190 states. [2020-10-28 18:56:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9190 to 3240. [2020-10-28 18:56:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3240 states. [2020-10-28 18:56:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4779 transitions. [2020-10-28 18:56:26,073 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4779 transitions. Word has length 57 [2020-10-28 18:56:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:26,073 INFO L481 AbstractCegarLoop]: Abstraction has 3240 states and 4779 transitions. [2020-10-28 18:56:26,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:56:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4779 transitions. [2020-10-28 18:56:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:26,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:26,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:26,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:56:26,077 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash 153264034, now seen corresponding path program 1 times [2020-10-28 18:56:26,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:26,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779621866] [2020-10-28 18:56:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:26,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:31,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:31,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:31,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:56:31,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:56:31,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:31,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:56:31,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:56:31,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:32,719 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:32,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:32,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:32,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:32,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:32,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:56:32,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:32,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:32,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:32,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779621866] [2020-10-28 18:56:32,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:32,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:32,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167975288] [2020-10-28 18:56:32,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:32,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:32,775 INFO L87 Difference]: Start difference. First operand 3240 states and 4779 transitions. Second operand 4 states. [2020-10-28 18:56:36,772 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:56:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:38,160 INFO L93 Difference]: Finished difference Result 7030 states and 10779 transitions. [2020-10-28 18:56:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:38,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:56:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:38,179 INFO L225 Difference]: With dead ends: 7030 [2020-10-28 18:56:38,180 INFO L226 Difference]: Without dead ends: 4797 [2020-10-28 18:56:38,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2020-10-28 18:56:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3430. [2020-10-28 18:56:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3430 states. [2020-10-28 18:56:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 5132 transitions. [2020-10-28 18:56:38,507 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 5132 transitions. Word has length 58 [2020-10-28 18:56:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:38,507 INFO L481 AbstractCegarLoop]: Abstraction has 3430 states and 5132 transitions. [2020-10-28 18:56:38,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 5132 transitions. [2020-10-28 18:56:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:38,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:38,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:38,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:56:38,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:38,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1048681273, now seen corresponding path program 1 times [2020-10-28 18:56:38,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:38,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40126257] [2020-10-28 18:56:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:38,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4744 [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:56:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:56:43,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:44,910 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:44,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:44,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40126257] [2020-10-28 18:56:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:44,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901979178] [2020-10-28 18:56:44,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:44,950 INFO L87 Difference]: Start difference. First operand 3430 states and 5132 transitions. Second operand 4 states. [2020-10-28 18:56:49,374 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:56:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:50,482 INFO L93 Difference]: Finished difference Result 8321 states and 12763 transitions. [2020-10-28 18:56:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:50,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:56:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:50,497 INFO L225 Difference]: With dead ends: 8321 [2020-10-28 18:56:50,498 INFO L226 Difference]: Without dead ends: 5523 [2020-10-28 18:56:50,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2020-10-28 18:56:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4270. [2020-10-28 18:56:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4270 states. [2020-10-28 18:56:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4270 states to 4270 states and 6362 transitions. [2020-10-28 18:56:50,942 INFO L78 Accepts]: Start accepts. Automaton has 4270 states and 6362 transitions. Word has length 58 [2020-10-28 18:56:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:50,942 INFO L481 AbstractCegarLoop]: Abstraction has 4270 states and 6362 transitions. [2020-10-28 18:56:50,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states and 6362 transitions. [2020-10-28 18:56:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:56:50,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:50,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:50,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:56:50,946 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 887398114, now seen corresponding path program 1 times [2020-10-28 18:56:50,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:50,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068716888] [2020-10-28 18:56:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:51,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:53,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:55,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4674 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:56:55,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:55,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:56:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:57,446 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:56:57,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:57,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:57,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:57,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:56:57,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:57,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:57,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:57,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068716888] [2020-10-28 18:56:57,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:57,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428762442] [2020-10-28 18:56:57,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:56:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:56:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:56:57,501 INFO L87 Difference]: Start difference. First operand 4270 states and 6362 transitions. Second operand 9 states. [2020-10-28 18:56:59,262 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:57:04,667 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 348 [2020-10-28 18:57:07,942 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 350 [2020-10-28 18:57:09,765 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:57:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:11,339 INFO L93 Difference]: Finished difference Result 6171 states and 9214 transitions. [2020-10-28 18:57:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:57:11,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 18:57:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:11,355 INFO L225 Difference]: With dead ends: 6171 [2020-10-28 18:57:11,355 INFO L226 Difference]: Without dead ends: 6166 [2020-10-28 18:57:11,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:57:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2020-10-28 18:57:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 4267. [2020-10-28 18:57:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4267 states. [2020-10-28 18:57:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6357 transitions. [2020-10-28 18:57:11,841 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6357 transitions. Word has length 60 [2020-10-28 18:57:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 4267 states and 6357 transitions. [2020-10-28 18:57:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:57:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6357 transitions. [2020-10-28 18:57:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:57:11,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:11,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:11,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:57:11,845 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash 963715143, now seen corresponding path program 1 times [2020-10-28 18:57:11,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:11,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41119122] [2020-10-28 18:57:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:11,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:15,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:15,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:57:15,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:57:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3728 [2020-10-28 18:57:15,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:15,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:57:15,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:57:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:17,330 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:17,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:17,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:17,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:17,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:57:17,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:17,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:17,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:17,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:17,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41119122] [2020-10-28 18:57:17,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:17,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:57:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147860805] [2020-10-28 18:57:17,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:57:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:57:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:57:17,375 INFO L87 Difference]: Start difference. First operand 4267 states and 6357 transitions. Second operand 9 states. [2020-10-28 18:57:19,130 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:57:25,211 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:57:27,013 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:57:28,922 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:57:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:30,345 INFO L93 Difference]: Finished difference Result 6326 states and 9367 transitions. [2020-10-28 18:57:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:57:30,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 18:57:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:30,362 INFO L225 Difference]: With dead ends: 6326 [2020-10-28 18:57:30,363 INFO L226 Difference]: Without dead ends: 6124 [2020-10-28 18:57:30,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:57:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-10-28 18:57:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 4256. [2020-10-28 18:57:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4256 states. [2020-10-28 18:57:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4256 states to 4256 states and 6343 transitions. [2020-10-28 18:57:30,955 INFO L78 Accepts]: Start accepts. Automaton has 4256 states and 6343 transitions. Word has length 60 [2020-10-28 18:57:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:30,955 INFO L481 AbstractCegarLoop]: Abstraction has 4256 states and 6343 transitions. [2020-10-28 18:57:30,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:57:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4256 states and 6343 transitions. [2020-10-28 18:57:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:57:30,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:30,958 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] [2020-10-28 18:57:30,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:57:30,958 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:30,958 INFO L82 PathProgramCache]: Analyzing trace with hash -20380134, now seen corresponding path program 1 times [2020-10-28 18:57:30,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:30,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451850111] [2020-10-28 18:57:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:35,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4870 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:57:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:57:35,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:37,510 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:57:37,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:37,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:37,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:37,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:37,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:57:37,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:37,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:37,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:37,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:37,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:37,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451850111] [2020-10-28 18:57:37,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:37,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369233606] [2020-10-28 18:57:37,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:37,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:37,564 INFO L87 Difference]: Start difference. First operand 4256 states and 6343 transitions. Second operand 4 states. [2020-10-28 18:57:39,249 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:57:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:43,108 INFO L93 Difference]: Finished difference Result 11044 states and 16765 transitions. [2020-10-28 18:57:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:43,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:57:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:43,128 INFO L225 Difference]: With dead ends: 11044 [2020-10-28 18:57:43,128 INFO L226 Difference]: Without dead ends: 7571 [2020-10-28 18:57:43,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states.