/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:40:09,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:40:09,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:40:09,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:40:09,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:40:09,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:40:09,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:40:09,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:40:09,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:40:09,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:40:09,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:40:09,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:40:09,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:40:09,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:40:09,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:40:09,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:40:09,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:40:09,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:40:09,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:40:09,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:40:09,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:40:09,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:40:09,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:40:09,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:40:09,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:40:09,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:40:09,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:40:09,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:40:09,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:40:10,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:40:10,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:40:10,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:40:10,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:40:10,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:40:10,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:40:10,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:40:10,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:40:10,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:40:10,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:40:10,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:40:10,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:40:10,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:40:10,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:40:10,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:40:10,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:40:10,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:40:10,056 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:40:10,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:40:10,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:40:10,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:40:10,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:40:10,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:40:10,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:40:10,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:40:10,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:40:10,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:40:10,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:40:10,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:40:10,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:40:10,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:40:10,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:40:10,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:40:10,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:40:10,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:40:10,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:40:10,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:40:10,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:40:10,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:40:10,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:40:10,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:40:10,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:40:10,568 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:40:10,569 INFO L432 ainManager$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.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:40:10,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8168e63/e07e45ce6a1e4664ba848e0fc6de76cb/FLAGf3f3562dc [2020-10-29 13:40:11,593 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:40:11,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:40:11,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8168e63/e07e45ce6a1e4664ba848e0fc6de76cb/FLAGf3f3562dc [2020-10-29 13:40:11,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd8168e63/e07e45ce6a1e4664ba848e0fc6de76cb [2020-10-29 13:40:11,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:40:11,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:40:11,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:11,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:40:11,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:40:11,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:11" (1/1) ... [2020-10-29 13:40:11,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dab0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:11, skipping insertion in model container [2020-10-29 13:40:11,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:11" (1/1) ... [2020-10-29 13:40:11,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:40:11,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:40:12,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:12,871 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:40:13,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:13,362 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:40:13,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13 WrapperNode [2020-10-29 13:40:13,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:13,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:40:13,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:40:13,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:40:13,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... [2020-10-29 13:40:13,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:40:13,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:40:13,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:40:13,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:40:13,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:40:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:40:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:40:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:40:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:40:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:40:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:40:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:40:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:40:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:40:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:40:18,126 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:40:18,126 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:40:18,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:18 BoogieIcfgContainer [2020-10-29 13:40:18,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:40:18,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:40:18,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:40:18,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:40:18,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:40:11" (1/3) ... [2020-10-29 13:40:18,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30608d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:18, skipping insertion in model container [2020-10-29 13:40:18,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:13" (2/3) ... [2020-10-29 13:40:18,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30608d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:18, skipping insertion in model container [2020-10-29 13:40:18,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:18" (3/3) ... [2020-10-29 13:40:18,144 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:40:18,158 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:40:18,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:40:18,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:40:18,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:40:18,217 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:40:18,217 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:40:18,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:40:18,217 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:40:18,217 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:40:18,218 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:40:18,218 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:40:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states. [2020-10-29 13:40:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:40:18,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:18,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:18,288 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash 273753204, now seen corresponding path program 1 times [2020-10-29 13:40:18,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:18,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666208277] [2020-10-29 13:40:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:19,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:19,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:23,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:23,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:40:23,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:23,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:40:23,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:23,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:40:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:40:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:40:25,713 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:40:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:25,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:25,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:25,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:25,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:25,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 13:40:25,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:25,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:25,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:25,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666208277] [2020-10-29 13:40:25,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:25,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561027389] [2020-10-29 13:40:25,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:25,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:25,846 INFO L87 Difference]: Start difference. First operand 1299 states. Second operand 6 states. [2020-10-29 13:40:27,821 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:40:42,192 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:40:48,333 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:40:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:48,660 INFO L93 Difference]: Finished difference Result 3574 states and 6101 transitions. [2020-10-29 13:40:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:40:48,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:40:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:48,710 INFO L225 Difference]: With dead ends: 3574 [2020-10-29 13:40:48,711 INFO L226 Difference]: Without dead ends: 2499 [2020-10-29 13:40:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:40:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-10-29 13:40:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2301. [2020-10-29 13:40:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2301 states. [2020-10-29 13:40:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3001 transitions. [2020-10-29 13:40:48,916 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3001 transitions. Word has length 57 [2020-10-29 13:40:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:48,917 INFO L481 AbstractCegarLoop]: Abstraction has 2301 states and 3001 transitions. [2020-10-29 13:40:48,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3001 transitions. [2020-10-29 13:40:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:40:48,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:48,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:48,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:40:48,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 919223166, now seen corresponding path program 1 times [2020-10-29 13:40:48,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:48,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602809568] [2020-10-29 13:40:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:54,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:40:54,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 13:40:54,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:54,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:54,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:54,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:40:54,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:40:54,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:56,029 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:40:56,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:56,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:56,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602809568] [2020-10-29 13:40:56,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:56,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:56,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512661759] [2020-10-29 13:40:56,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:56,116 INFO L87 Difference]: Start difference. First operand 2301 states and 3001 transitions. Second operand 6 states. [2020-10-29 13:40:58,114 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:41:11,246 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:41:13,480 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:41:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:13,853 INFO L93 Difference]: Finished difference Result 2644 states and 3497 transitions. [2020-10-29 13:41:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:41:13,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:41:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:13,868 INFO L225 Difference]: With dead ends: 2644 [2020-10-29 13:41:13,868 INFO L226 Difference]: Without dead ends: 2493 [2020-10-29 13:41:13,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:41:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2020-10-29 13:41:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2291. [2020-10-29 13:41:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2291 states. [2020-10-29 13:41:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 2986 transitions. [2020-10-29 13:41:13,955 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 2986 transitions. Word has length 58 [2020-10-29 13:41:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:13,956 INFO L481 AbstractCegarLoop]: Abstraction has 2291 states and 2986 transitions. [2020-10-29 13:41:13,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 2986 transitions. [2020-10-29 13:41:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:41:13,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:13,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:13,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:41:13,962 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:13,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1320308122, now seen corresponding path program 1 times [2020-10-29 13:41:13,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:13,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453539019] [2020-10-29 13:41:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:14,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:14,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:17,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:19,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:41:19,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:41:19,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:41:19,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:19,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:19,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:41:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:41:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:20,969 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:41:20,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:21,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:21,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:21,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:41:21,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:21,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:21,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:21,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453539019] [2020-10-29 13:41:21,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:21,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:41:21,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020062346] [2020-10-29 13:41:21,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:21,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:21,058 INFO L87 Difference]: Start difference. First operand 2291 states and 2986 transitions. Second operand 6 states. [2020-10-29 13:41:23,003 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:41:30,871 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-29 13:41:35,126 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-29 13:41:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:36,033 INFO L93 Difference]: Finished difference Result 4985 states and 6823 transitions. [2020-10-29 13:41:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:41:36,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:41:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:36,054 INFO L225 Difference]: With dead ends: 4985 [2020-10-29 13:41:36,054 INFO L226 Difference]: Without dead ends: 4018 [2020-10-29 13:41:36,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:41:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2020-10-29 13:41:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3493. [2020-10-29 13:41:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3493 states. [2020-10-29 13:41:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4675 transitions. [2020-10-29 13:41:36,213 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4675 transitions. Word has length 58 [2020-10-29 13:41:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:36,214 INFO L481 AbstractCegarLoop]: Abstraction has 3493 states and 4675 transitions. [2020-10-29 13:41:36,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4675 transitions. [2020-10-29 13:41:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:41:36,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:36,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:36,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:41:36,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash 304606119, now seen corresponding path program 1 times [2020-10-29 13:41:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:36,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335069201] [2020-10-29 13:41:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:41,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:41,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:41:41,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:41:41,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:41:41,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:41,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:41:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:41:41,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:43,393 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:41:43,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:43,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:43,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:43,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:43,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:43,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335069201] [2020-10-29 13:41:43,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:43,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:41:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380193336] [2020-10-29 13:41:43,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:41:43,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:41:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:43,474 INFO L87 Difference]: Start difference. First operand 3493 states and 4675 transitions. Second operand 9 states. [2020-10-29 13:41:45,379 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:41:53,408 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-29 13:41:55,927 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 539 [2020-10-29 13:41:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:58,039 INFO L93 Difference]: Finished difference Result 7667 states and 11133 transitions. [2020-10-29 13:41:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:41:58,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-29 13:41:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:58,070 INFO L225 Difference]: With dead ends: 7667 [2020-10-29 13:41:58,070 INFO L226 Difference]: Without dead ends: 7662 [2020-10-29 13:41:58,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:41:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2020-10-29 13:41:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 3490. [2020-10-29 13:41:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3490 states. [2020-10-29 13:41:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 4670 transitions. [2020-10-29 13:41:58,308 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 4670 transitions. Word has length 58 [2020-10-29 13:41:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:58,308 INFO L481 AbstractCegarLoop]: Abstraction has 3490 states and 4670 transitions. [2020-10-29 13:41:58,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:41:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 4670 transitions. [2020-10-29 13:41:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:41:58,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:58,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:58,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:41:58,314 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 150911763, now seen corresponding path program 1 times [2020-10-29 13:41:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:58,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797844589] [2020-10-29 13:41:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:58,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:00,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:00,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:03,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:03,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:42:03,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:42:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:42:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:05,384 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:42:05,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:05,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:05,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:05,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:05,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:05,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797844589] [2020-10-29 13:42:05,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:05,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:42:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196842509] [2020-10-29 13:42:05,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:42:05,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:42:05,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:42:05,529 INFO L87 Difference]: Start difference. First operand 3490 states and 4670 transitions. Second operand 8 states. [2020-10-29 13:42:07,389 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 533 [2020-10-29 13:42:16,603 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:42:20,206 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:42:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:20,941 INFO L93 Difference]: Finished difference Result 7714 states and 10963 transitions. [2020-10-29 13:42:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:42:20,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-29 13:42:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:20,966 INFO L225 Difference]: With dead ends: 7714 [2020-10-29 13:42:20,967 INFO L226 Difference]: Without dead ends: 6508 [2020-10-29 13:42:20,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-29 13:42:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2020-10-29 13:42:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 3497. [2020-10-29 13:42:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3497 states. [2020-10-29 13:42:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 4645 transitions. [2020-10-29 13:42:21,271 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 4645 transitions. Word has length 59 [2020-10-29 13:42:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:21,272 INFO L481 AbstractCegarLoop]: Abstraction has 3497 states and 4645 transitions. [2020-10-29 13:42:21,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:42:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 4645 transitions. [2020-10-29 13:42:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:42:21,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:21,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:21,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:42:21,277 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2097672199, now seen corresponding path program 1 times [2020-10-29 13:42:21,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:21,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185661418] [2020-10-29 13:42:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:21,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:22,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:22,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:24,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:26,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:26,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:42:26,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:42:26,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:42:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:28,418 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:42:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:28,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:28,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:28,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185661418] [2020-10-29 13:42:28,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:28,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987733712] [2020-10-29 13:42:28,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:28,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:28,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:28,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:28,523 INFO L87 Difference]: Start difference. First operand 3497 states and 4645 transitions. Second operand 6 states. [2020-10-29 13:42:30,545 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:42:37,097 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:42:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:38,553 INFO L93 Difference]: Finished difference Result 4253 states and 5775 transitions. [2020-10-29 13:42:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:38,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-29 13:42:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:38,564 INFO L225 Difference]: With dead ends: 4253 [2020-10-29 13:42:38,565 INFO L226 Difference]: Without dead ends: 2488 [2020-10-29 13:42:38,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2020-10-29 13:42:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2482. [2020-10-29 13:42:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-29 13:42:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3297 transitions. [2020-10-29 13:42:38,752 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3297 transitions. Word has length 60 [2020-10-29 13:42:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:38,752 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3297 transitions. [2020-10-29 13:42:38,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3297 transitions. [2020-10-29 13:42:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:42:38,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:38,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:38,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:42:38,756 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash -761155748, now seen corresponding path program 1 times [2020-10-29 13:42:38,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:38,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395828529] [2020-10-29 13:42:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:39,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:39,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:40,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:40,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:43,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:43,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:42:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:45,825 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:42:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:45,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:45,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:45,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:45,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:42:45,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:45,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:45,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:45,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:45,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395828529] [2020-10-29 13:42:45,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:45,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:42:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182961659] [2020-10-29 13:42:45,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:42:45,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:42:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:42:45,906 INFO L87 Difference]: Start difference. First operand 2482 states and 3297 transitions. Second operand 8 states. [2020-10-29 13:42:47,949 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:42:54,926 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:42:59,429 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:43:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:00,302 INFO L93 Difference]: Finished difference Result 3951 states and 5471 transitions. [2020-10-29 13:43:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:43:00,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 13:43:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:00,314 INFO L225 Difference]: With dead ends: 3951 [2020-10-29 13:43:00,314 INFO L226 Difference]: Without dead ends: 3944 [2020-10-29 13:43:00,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:43:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2020-10-29 13:43:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 2482. [2020-10-29 13:43:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-29 13:43:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3296 transitions. [2020-10-29 13:43:00,486 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3296 transitions. Word has length 60 [2020-10-29 13:43:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:00,486 INFO L481 AbstractCegarLoop]: Abstraction has 2482 states and 3296 transitions. [2020-10-29 13:43:00,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:43:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3296 transitions. [2020-10-29 13:43:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:43:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:00,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:00,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:43:00,490 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1603416637, now seen corresponding path program 1 times [2020-10-29 13:43:00,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:00,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665919530] [2020-10-29 13:43:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:05,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:43:05,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:43:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:07,693 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:43:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:07,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:07,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:07,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:07,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:43:07,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:07,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:07,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:07,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665919530] [2020-10-29 13:43:07,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:07,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:43:07,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572578195] [2020-10-29 13:43:07,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:43:07,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:07,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:43:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:43:07,766 INFO L87 Difference]: Start difference. First operand 2482 states and 3296 transitions. Second operand 8 states. [2020-10-29 13:43:09,858 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 542 [2020-10-29 13:43:17,585 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-29 13:43:19,978 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 538 [2020-10-29 13:43:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:22,715 INFO L93 Difference]: Finished difference Result 8670 states and 12519 transitions. [2020-10-29 13:43:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:43:22,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 13:43:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:22,736 INFO L225 Difference]: With dead ends: 8670 [2020-10-29 13:43:22,736 INFO L226 Difference]: Without dead ends: 7866 [2020-10-29 13:43:22,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:43:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7866 states. [2020-10-29 13:43:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7866 to 2392. [2020-10-29 13:43:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2392 states. [2020-10-29 13:43:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3174 transitions. [2020-10-29 13:43:23,010 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3174 transitions. Word has length 60 [2020-10-29 13:43:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:23,010 INFO L481 AbstractCegarLoop]: Abstraction has 2392 states and 3174 transitions. [2020-10-29 13:43:23,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:43:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3174 transitions. [2020-10-29 13:43:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:43:23,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:23,014 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, 1, 1, 1, 1] [2020-10-29 13:43:23,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:43:23,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:23,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1597113963, now seen corresponding path program 1 times [2020-10-29 13:43:23,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:23,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602165616] [2020-10-29 13:43:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:23,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:23,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:24,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:27,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:28,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:28,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:43:28,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:28,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:43:28,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:30,075 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:43:30,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:30,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:30,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:30,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:30,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602165616] [2020-10-29 13:43:30,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:30,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:43:30,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444264115] [2020-10-29 13:43:30,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:43:30,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:43:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:43:30,154 INFO L87 Difference]: Start difference. First operand 2392 states and 3174 transitions. Second operand 8 states. [2020-10-29 13:43:32,267 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:43:40,073 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 537