/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.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:39:16,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:39:16,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:39:16,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:39:16,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:39:16,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:39:16,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:39:16,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:39:16,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:39:16,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:39:16,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:39:16,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:39:16,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:39:16,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:39:16,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:39:16,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:39:16,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:39:16,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:39:16,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:39:16,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:39:16,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:39:16,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:39:16,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:39:16,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:39:16,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:39:16,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:39:16,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:39:16,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:39:16,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:39:16,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:39:16,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:39:16,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:39:16,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:39:16,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:39:16,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:39:16,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:39:16,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:39:16,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:39:16,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:39:16,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:39:16,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:39:16,992 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 13:39:17,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:39:17,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:39:17,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:39:17,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:39:17,056 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:39:17,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:39:17,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:39:17,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:39:17,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:39:17,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:39:17,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:39:17,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:39:17,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:39:17,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:39:17,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:39:17,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:39:17,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:39:17,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:39:17,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:39:17,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:39:17,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:39:17,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:39:17,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:39:17,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:39:17,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:39:17,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:39:17,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:39:17,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:39:17,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:39:17,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:39:17,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:39:17,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:39:17,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:39:17,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:39:17,551 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:39:17,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:39:17,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e15ac26/f06a6903c55f432a987294b8135d122e/FLAG7e30035e2 [2020-10-29 13:39:18,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:39:18,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:39:18,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e15ac26/f06a6903c55f432a987294b8135d122e/FLAG7e30035e2 [2020-10-29 13:39:19,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e15ac26/f06a6903c55f432a987294b8135d122e [2020-10-29 13:39:19,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:39:19,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:39:19,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:39:19,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:39:19,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:39:19,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:39:19" (1/1) ... [2020-10-29 13:39:19,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a2a0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:19, skipping insertion in model container [2020-10-29 13:39:19,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:39:19" (1/1) ... [2020-10-29 13:39:19,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:39:19,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:39:20,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:39:20,292 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:39:20,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:39:20,610 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:39:20,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20 WrapperNode [2020-10-29 13:39:20,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:39:20,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:39:20,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:39:20,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:39:20,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (1/1) ... [2020-10-29 13:39:20,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:39:20,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:39:20,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:39:20,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:39:20,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (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 13:39:21,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:39:21,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:39:21,029 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:39:21,029 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:39:21,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:39:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:39:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:39:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:39:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:39:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:39:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:39:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:39:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:39:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:39:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:39:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:39:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:39:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:39:25,383 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:39:25,383 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:39:25,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:39:25 BoogieIcfgContainer [2020-10-29 13:39:25,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:39:25,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:39:25,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:39:25,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:39:25,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:39:19" (1/3) ... [2020-10-29 13:39:25,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeff06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:39:25, skipping insertion in model container [2020-10-29 13:39:25,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:20" (2/3) ... [2020-10-29 13:39:25,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abeff06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:39:25, skipping insertion in model container [2020-10-29 13:39:25,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:39:25" (3/3) ... [2020-10-29 13:39:25,400 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:39:25,413 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:39:25,420 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:39:25,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:39:25,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:39:25,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:39:25,469 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:39:25,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:39:25,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:39:25,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:39:25,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:39:25,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:39:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states. [2020-10-29 13:39:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:39:25,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:25,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:25,534 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -966739044, now seen corresponding path program 1 times [2020-10-29 13:39:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:25,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939762604] [2020-10-29 13:39:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:26,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:29,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:30,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:30,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:39:30,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:39:30,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:39:30,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:30,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:39:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:39:32,567 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:39:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:32,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:32,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:32,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:32,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:32,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:39:32,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:32,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:32,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:32,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:32,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:32,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:32,656 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 13:39:32,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939762604] [2020-10-29 13:39:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:32,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488865540] [2020-10-29 13:39:32,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:32,691 INFO L87 Difference]: Start difference. First operand 1130 states. Second operand 8 states. [2020-10-29 13:39:33,759 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:39:42,116 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:39:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:44,014 INFO L93 Difference]: Finished difference Result 1837 states and 3214 transitions. [2020-10-29 13:39:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:39:44,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-29 13:39:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:44,066 INFO L225 Difference]: With dead ends: 1837 [2020-10-29 13:39:44,066 INFO L226 Difference]: Without dead ends: 1312 [2020-10-29 13:39:44,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:39:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2020-10-29 13:39:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1141. [2020-10-29 13:39:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2020-10-29 13:39:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1504 transitions. [2020-10-29 13:39:44,237 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1504 transitions. Word has length 56 [2020-10-29 13:39:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:44,238 INFO L481 AbstractCegarLoop]: Abstraction has 1141 states and 1504 transitions. [2020-10-29 13:39:44,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1504 transitions. [2020-10-29 13:39:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:39:44,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:44,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:44,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:39:44,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash -308374435, now seen corresponding path program 1 times [2020-10-29 13:39:44,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:44,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175877326] [2020-10-29 13:39:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:48,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:49,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:49,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:39:49,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:39:49,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:39:49,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:49,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:49,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:39:49,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:39:50,401 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:39:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:50,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:50,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:50,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:39:50,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:50,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:39:50,470 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 13:39:50,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175877326] [2020-10-29 13:39:50,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:50,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:39:50,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265210714] [2020-10-29 13:39:50,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:39:50,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:39:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:50,475 INFO L87 Difference]: Start difference. First operand 1141 states and 1504 transitions. Second operand 9 states. [2020-10-29 13:39:51,444 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:39:56,104 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:39:57,541 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:39:59,867 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:40:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:00,624 INFO L93 Difference]: Finished difference Result 2534 states and 3638 transitions. [2020-10-29 13:40:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:40:00,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-29 13:40:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:00,637 INFO L225 Difference]: With dead ends: 2534 [2020-10-29 13:40:00,637 INFO L226 Difference]: Without dead ends: 2039 [2020-10-29 13:40:00,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:40:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2020-10-29 13:40:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1308. [2020-10-29 13:40:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-10-29 13:40:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1789 transitions. [2020-10-29 13:40:00,726 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1789 transitions. Word has length 56 [2020-10-29 13:40:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:00,726 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 1789 transitions. [2020-10-29 13:40:00,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:40:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1789 transitions. [2020-10-29 13:40:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:40:00,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:00,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:00,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:40:00,730 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash 517956793, now seen corresponding path program 1 times [2020-10-29 13:40:00,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:00,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290245765] [2020-10-29 13:40:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:00,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:04,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:05,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:40:05,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:40:05,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:40:05,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:05,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:05,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:40:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:40:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:06,737 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:40:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:06,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:06,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:06,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:40:06,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:06,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:06,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:06,797 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 13:40:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290245765] [2020-10-29 13:40:06,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:06,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:06,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768903487] [2020-10-29 13:40:06,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:06,800 INFO L87 Difference]: Start difference. First operand 1308 states and 1789 transitions. Second operand 6 states. [2020-10-29 13:40:07,656 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:40:15,056 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:40:16,146 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:40:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:16,587 INFO L93 Difference]: Finished difference Result 3916 states and 5746 transitions. [2020-10-29 13:40:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:40:16,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-29 13:40:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:16,612 INFO L225 Difference]: With dead ends: 3916 [2020-10-29 13:40:16,612 INFO L226 Difference]: Without dead ends: 3521 [2020-10-29 13:40:16,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:40:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2020-10-29 13:40:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2811. [2020-10-29 13:40:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2020-10-29 13:40:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4006 transitions. [2020-10-29 13:40:16,792 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4006 transitions. Word has length 56 [2020-10-29 13:40:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:16,792 INFO L481 AbstractCegarLoop]: Abstraction has 2811 states and 4006 transitions. [2020-10-29 13:40:16,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4006 transitions. [2020-10-29 13:40:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:40:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:16,797 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 13:40:16,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:40:16,797 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:16,798 INFO L82 PathProgramCache]: Analyzing trace with hash -636135544, now seen corresponding path program 1 times [2020-10-29 13:40:16,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:16,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688049852] [2020-10-29 13:40:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:17,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:17,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:18,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:20,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:21,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:21,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:40:21,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:40:21,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 13:40:21,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:21,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:40:21,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:22,923 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:40:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:22,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:22,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:22,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:22,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:22,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:40:22,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:22,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:22,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:22,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:22,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:22,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:22,993 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 13:40:22,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688049852] [2020-10-29 13:40:22,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:22,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:40:22,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465819442] [2020-10-29 13:40:22,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:22,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:22,996 INFO L87 Difference]: Start difference. First operand 2811 states and 4006 transitions. Second operand 8 states. [2020-10-29 13:40:24,016 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:40:29,776 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:40:32,559 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:40:33,821 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:40:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:34,540 INFO L93 Difference]: Finished difference Result 6136 states and 9223 transitions. [2020-10-29 13:40:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:40:34,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-29 13:40:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:34,566 INFO L225 Difference]: With dead ends: 6136 [2020-10-29 13:40:34,566 INFO L226 Difference]: Without dead ends: 4767 [2020-10-29 13:40:34,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:40:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2020-10-29 13:40:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 3124. [2020-10-29 13:40:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3124 states. [2020-10-29 13:40:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 4479 transitions. [2020-10-29 13:40:34,799 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 4479 transitions. Word has length 57 [2020-10-29 13:40:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:34,799 INFO L481 AbstractCegarLoop]: Abstraction has 3124 states and 4479 transitions. [2020-10-29 13:40:34,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:40:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 4479 transitions. [2020-10-29 13:40:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:40:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:34,805 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 13:40:34,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:40:34,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash -468120866, now seen corresponding path program 1 times [2020-10-29 13:40:34,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:34,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717793944] [2020-10-29 13:40:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:39,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:39,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:40:39,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:40:39,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:40:39,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:39,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:39,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:39,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:39,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:40:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 13:40:40,804 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:40:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:40,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:40,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:40,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:40:40,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:40,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:40,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:40,876 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 13:40:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717793944] [2020-10-29 13:40:40,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:40,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:40:40,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74683415] [2020-10-29 13:40:40,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:40,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:40,882 INFO L87 Difference]: Start difference. First operand 3124 states and 4479 transitions. Second operand 8 states. [2020-10-29 13:40:41,819 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:40:47,722 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:40:50,149 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:40:51,290 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:40:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:52,241 INFO L93 Difference]: Finished difference Result 7515 states and 11255 transitions. [2020-10-29 13:40:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:40:52,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-29 13:40:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:52,274 INFO L225 Difference]: With dead ends: 7515 [2020-10-29 13:40:52,274 INFO L226 Difference]: Without dead ends: 5942 [2020-10-29 13:40:52,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:40:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2020-10-29 13:40:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4338. [2020-10-29 13:40:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4338 states. [2020-10-29 13:40:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 6311 transitions. [2020-10-29 13:40:52,648 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 6311 transitions. Word has length 57 [2020-10-29 13:40:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:52,648 INFO L481 AbstractCegarLoop]: Abstraction has 4338 states and 6311 transitions. [2020-10-29 13:40:52,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:40:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 6311 transitions. [2020-10-29 13:40:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:40:52,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:52,654 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 13:40:52,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:40:52,654 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:52,655 INFO L82 PathProgramCache]: Analyzing trace with hash 153264034, now seen corresponding path program 1 times [2020-10-29 13:40:52,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:52,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636800826] [2020-10-29 13:40:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:57,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:57,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:40:57,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:40:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:58,745 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:40:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:58,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:58,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:58,802 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 13:40:58,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636800826] [2020-10-29 13:40:58,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:58,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:40:58,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363125248] [2020-10-29 13:40:58,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:58,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:58,805 INFO L87 Difference]: Start difference. First operand 4338 states and 6311 transitions. Second operand 8 states. [2020-10-29 13:40:59,764 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:41:06,884 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 356 DAG size of output: 353 [2020-10-29 13:41:07,831 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:08,378 INFO L93 Difference]: Finished difference Result 8744 states and 13284 transitions. [2020-10-29 13:41:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:41:08,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-29 13:41:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:08,404 INFO L225 Difference]: With dead ends: 8744 [2020-10-29 13:41:08,405 INFO L226 Difference]: Without dead ends: 6908 [2020-10-29 13:41:08,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:41:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2020-10-29 13:41:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 4225. [2020-10-29 13:41:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4225 states. [2020-10-29 13:41:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 6151 transitions. [2020-10-29 13:41:08,754 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 6151 transitions. Word has length 58 [2020-10-29 13:41:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:08,754 INFO L481 AbstractCegarLoop]: Abstraction has 4225 states and 6151 transitions. [2020-10-29 13:41:08,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 6151 transitions. [2020-10-29 13:41:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:41:08,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:08,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:08,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:41:08,762 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -525037902, now seen corresponding path program 1 times [2020-10-29 13:41:08,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:08,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150063839] [2020-10-29 13:41:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:08,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:08,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:09,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:09,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:11,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:41:11,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:41:11,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3097 [2020-10-29 13:41:11,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:11,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:41:11,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,813 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:41:12,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:12,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:12,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:12,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:12,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:41:12,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:12,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:12,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150063839] [2020-10-29 13:41:12,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:12,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:41:12,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534900728] [2020-10-29 13:41:12,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:12,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:12,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:12,882 INFO L87 Difference]: Start difference. First operand 4225 states and 6151 transitions. Second operand 6 states. [2020-10-29 13:41:13,833 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:41:18,533 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:18,790 INFO L93 Difference]: Finished difference Result 7912 states and 11975 transitions. [2020-10-29 13:41:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:41:18,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-29 13:41:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:18,810 INFO L225 Difference]: With dead ends: 7912 [2020-10-29 13:41:18,811 INFO L226 Difference]: Without dead ends: 4898 [2020-10-29 13:41:18,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:41:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2020-10-29 13:41:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3869. [2020-10-29 13:41:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3869 states. [2020-10-29 13:41:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5686 transitions. [2020-10-29 13:41:19,103 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5686 transitions. Word has length 64 [2020-10-29 13:41:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:19,103 INFO L481 AbstractCegarLoop]: Abstraction has 3869 states and 5686 transitions. [2020-10-29 13:41:19,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5686 transitions. [2020-10-29 13:41:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:41:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:19,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:19,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:41:19,109 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2092089115, now seen corresponding path program 1 times [2020-10-29 13:41:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:19,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432947778] [2020-10-29 13:41:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:19,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:20,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:41:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:41:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,759 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:41:21,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:21,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:21,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:21,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:21,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:41:21,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:21,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:21,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,799 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 13:41:21,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432947778] [2020-10-29 13:41:21,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:21,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:41:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276306382] [2020-10-29 13:41:21,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:21,802 INFO L87 Difference]: Start difference. First operand 3869 states and 5686 transitions. Second operand 6 states. [2020-10-29 13:41:22,753 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:26,801 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-29 13:41:27,767 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:41:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:28,279 INFO L93 Difference]: Finished difference Result 14134 states and 21927 transitions. [2020-10-29 13:41:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:41:28,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-29 13:41:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:28,308 INFO L225 Difference]: With dead ends: 14134 [2020-10-29 13:41:28,309 INFO L226 Difference]: Without dead ends: 11571 [2020-10-29 13:41:28,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:41:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2020-10-29 13:41:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 6432. [2020-10-29 13:41:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6432 states. [2020-10-29 13:41:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 9644 transitions. [2020-10-29 13:41:28,877 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 9644 transitions. Word has length 64 [2020-10-29 13:41:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:28,878 INFO L481 AbstractCegarLoop]: Abstraction has 6432 states and 9644 transitions. [2020-10-29 13:41:28,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 9644 transitions. [2020-10-29 13:41:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:41:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:28,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:28,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:41:28,883 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 383932685, now seen corresponding path program 1 times [2020-10-29 13:41:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164993812] [2020-10-29 13:41:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:28,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:28,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:41:29,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:41:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-29 13:41:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:29,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:41:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:30,738 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:41:30,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:30,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:30,845 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 13:41:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164993812] [2020-10-29 13:41:30,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:30,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:41:30,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201064857] [2020-10-29 13:41:30,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:30,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:30,847 INFO L87 Difference]: Start difference. First operand 6432 states and 9644 transitions. Second operand 6 states. [2020-10-29 13:41:31,764 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:35,843 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-29 13:41:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:36,356 INFO L93 Difference]: Finished difference Result 14762 states and 22513 transitions. [2020-10-29 13:41:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:41:36,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-29 13:41:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:36,382 INFO L225 Difference]: With dead ends: 14762 [2020-10-29 13:41:36,382 INFO L226 Difference]: Without dead ends: 9232 [2020-10-29 13:41:36,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:41:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2020-10-29 13:41:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9229. [2020-10-29 13:41:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9229 states. [2020-10-29 13:41:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9229 states to 9229 states and 13843 transitions. [2020-10-29 13:41:37,199 INFO L78 Accepts]: Start accepts. Automaton has 9229 states and 13843 transitions. Word has length 65 [2020-10-29 13:41:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:37,199 INFO L481 AbstractCegarLoop]: Abstraction has 9229 states and 13843 transitions. [2020-10-29 13:41:37,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9229 states and 13843 transitions. [2020-10-29 13:41:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:41:37,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:37,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:37,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:41:37,208 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash -678104594, now seen corresponding path program 1 times [2020-10-29 13:41:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:37,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924444411] [2020-10-29 13:41:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:39,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:41:39,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:41:39,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2322 [2020-10-29 13:41:39,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:39,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:41:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:41:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:40,570 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:41:40,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:40,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:40,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:40,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:40,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:40,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:40,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:40,614 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 13:41:40,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924444411] [2020-10-29 13:41:40,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:40,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:41:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331433568] [2020-10-29 13:41:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:41:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:41:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:41:40,617 INFO L87 Difference]: Start difference. First operand 9229 states and 13843 transitions. Second operand 7 states. [2020-10-29 13:41:41,678 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:41:46,421 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:47,338 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:41:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:48,817 INFO L93 Difference]: Finished difference Result 23880 states and 36489 transitions. [2020-10-29 13:41:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:41:48,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-29 13:41:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:48,857 INFO L225 Difference]: With dead ends: 23880 [2020-10-29 13:41:48,858 INFO L226 Difference]: Without dead ends: 16082 [2020-10-29 13:41:48,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:41:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16082 states. [2020-10-29 13:41:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16082 to 9214. [2020-10-29 13:41:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9214 states. [2020-10-29 13:41:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9214 states to 9214 states and 13827 transitions. [2020-10-29 13:41:49,799 INFO L78 Accepts]: Start accepts. Automaton has 9214 states and 13827 transitions. Word has length 66 [2020-10-29 13:41:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:49,799 INFO L481 AbstractCegarLoop]: Abstraction has 9214 states and 13827 transitions. [2020-10-29 13:41:49,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:41:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 9214 states and 13827 transitions. [2020-10-29 13:41:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:41:49,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:49,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:49,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:41:49,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1152858892, now seen corresponding path program 1 times [2020-10-29 13:41:49,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:49,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168293882] [2020-10-29 13:41:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:49,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:52,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:41:52,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:41:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-29 13:41:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:52,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:41:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:41:52,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:53,208 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:41:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:53,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:53,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:53,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:53,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:53,272 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 13:41:53,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168293882] [2020-10-29 13:41:53,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:53,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:41:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770909733] [2020-10-29 13:41:53,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:53,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:53,275 INFO L87 Difference]: Start difference. First operand 9214 states and 13827 transitions. Second operand 6 states. [2020-10-29 13:41:57,244 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:41:58,168 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:41:59,202 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:42:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:00,175 INFO L93 Difference]: Finished difference Result 20767 states and 31643 transitions. [2020-10-29 13:42:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:42:00,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:42:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:00,203 INFO L225 Difference]: With dead ends: 20767 [2020-10-29 13:42:00,204 INFO L226 Difference]: Without dead ends: 12318 [2020-10-29 13:42:00,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2020-10-29 13:42:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 12312. [2020-10-29 13:42:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12312 states. [2020-10-29 13:42:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12312 states to 12312 states and 18385 transitions. [2020-10-29 13:42:01,331 INFO L78 Accepts]: Start accepts. Automaton has 12312 states and 18385 transitions. Word has length 66 [2020-10-29 13:42:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:01,331 INFO L481 AbstractCegarLoop]: Abstraction has 12312 states and 18385 transitions. [2020-10-29 13:42:01,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 12312 states and 18385 transitions. [2020-10-29 13:42:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:42:01,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:01,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:01,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:42:01,338 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash 540242825, now seen corresponding path program 1 times [2020-10-29 13:42:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:01,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864993171] [2020-10-29 13:42:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:01,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:01,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2161 [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:03,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:42:03,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:04,506 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:42:04,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:04,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:04,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:04,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:04,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:42:04,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:04,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:04,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:04,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:04,598 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 13:42:04,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864993171] [2020-10-29 13:42:04,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:04,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687383085] [2020-10-29 13:42:04,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:04,601 INFO L87 Difference]: Start difference. First operand 12312 states and 18385 transitions. Second operand 6 states. [2020-10-29 13:42:05,517 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:42:08,856 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:42:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:09,711 INFO L93 Difference]: Finished difference Result 15469 states and 23142 transitions. [2020-10-29 13:42:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:09,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:42:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:09,734 INFO L225 Difference]: With dead ends: 15469 [2020-10-29 13:42:09,734 INFO L226 Difference]: Without dead ends: 10511 [2020-10-29 13:42:09,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2020-10-29 13:42:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 7434. [2020-10-29 13:42:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7434 states. [2020-10-29 13:42:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 11073 transitions. [2020-10-29 13:42:10,693 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 11073 transitions. Word has length 67 [2020-10-29 13:42:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:10,693 INFO L481 AbstractCegarLoop]: Abstraction has 7434 states and 11073 transitions. [2020-10-29 13:42:10,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 11073 transitions. [2020-10-29 13:42:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:42:10,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:10,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:10,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:42:10,696 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash 269137233, now seen corresponding path program 1 times [2020-10-29 13:42:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:10,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975245411] [2020-10-29 13:42:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:13,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:15,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:15,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:42:15,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:42:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:42:15,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:15,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:42:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:42:15,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:16,636 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:42:16,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:16,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:16,687 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 13:42:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975245411] [2020-10-29 13:42:16,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:16,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:42:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857392687] [2020-10-29 13:42:16,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:42:16,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:42:16,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:42:16,689 INFO L87 Difference]: Start difference. First operand 7434 states and 11073 transitions. Second operand 8 states. [2020-10-29 13:42:17,720 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:42:21,995 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:42:23,005 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:42:24,054 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-29 13:42:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:26,439 INFO L93 Difference]: Finished difference Result 21403 states and 31948 transitions. [2020-10-29 13:42:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:42:26,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-29 13:42:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:26,465 INFO L225 Difference]: With dead ends: 21403 [2020-10-29 13:42:26,465 INFO L226 Difference]: Without dead ends: 16522 [2020-10-29 13:42:26,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:42:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16522 states. [2020-10-29 13:42:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16522 to 7434. [2020-10-29 13:42:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7434 states. [2020-10-29 13:42:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 11071 transitions. [2020-10-29 13:42:27,514 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 11071 transitions. Word has length 67 [2020-10-29 13:42:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:27,515 INFO L481 AbstractCegarLoop]: Abstraction has 7434 states and 11071 transitions. [2020-10-29 13:42:27,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:42:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 11071 transitions. [2020-10-29 13:42:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:42:27,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:27,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:27,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:42:27,519 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 335429398, now seen corresponding path program 1 times [2020-10-29 13:42:27,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:27,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64639488] [2020-10-29 13:42:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:27,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:27,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:27,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:27,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:27,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:28,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:29,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:32,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:42:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:42:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,444 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:42:33,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:33,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:33,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:33,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:42:33,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:33,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,502 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 13:42:33,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64639488] [2020-10-29 13:42:33,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:33,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:42:33,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838614932] [2020-10-29 13:42:33,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:33,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:33,504 INFO L87 Difference]: Start difference. First operand 7434 states and 11071 transitions. Second operand 6 states. [2020-10-29 13:42:36,892 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-29 13:42:37,812 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:42:38,789 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:42:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:40,093 INFO L93 Difference]: Finished difference Result 17236 states and 25858 transitions. [2020-10-29 13:42:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:42:40,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:42:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:40,116 INFO L225 Difference]: With dead ends: 17236 [2020-10-29 13:42:40,116 INFO L226 Difference]: Without dead ends: 11373 [2020-10-29 13:42:40,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-10-29 13:42:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8401. [2020-10-29 13:42:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8401 states. [2020-10-29 13:42:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8401 states to 8401 states and 12316 transitions. [2020-10-29 13:42:41,450 INFO L78 Accepts]: Start accepts. Automaton has 8401 states and 12316 transitions. Word has length 67 [2020-10-29 13:42:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:41,459 INFO L481 AbstractCegarLoop]: Abstraction has 8401 states and 12316 transitions. [2020-10-29 13:42:41,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8401 states and 12316 transitions. [2020-10-29 13:42:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:42:41,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:41,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:41,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:42:41,464 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash -969719796, now seen corresponding path program 1 times [2020-10-29 13:42:41,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:41,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617932925] [2020-10-29 13:42:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-29 13:42:41,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 13:42:41,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:42,862 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:42:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:42,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:42,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617932925] [2020-10-29 13:42:42,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:42,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:42:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111912234] [2020-10-29 13:42:42,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:42:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:42:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:42:42,921 INFO L87 Difference]: Start difference. First operand 8401 states and 12316 transitions. Second operand 4 states. [2020-10-29 13:42:43,970 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-29 13:42:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:48,347 INFO L93 Difference]: Finished difference Result 22819 states and 33652 transitions. [2020-10-29 13:42:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:42:48,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-29 13:42:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:48,366 INFO L225 Difference]: With dead ends: 22819 [2020-10-29 13:42:48,366 INFO L226 Difference]: Without dead ends: 15206 [2020-10-29 13:42:48,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:42:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2020-10-29 13:42:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 14067. [2020-10-29 13:42:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14067 states. [2020-10-29 13:42:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14067 states to 14067 states and 20474 transitions. [2020-10-29 13:42:50,548 INFO L78 Accepts]: Start accepts. Automaton has 14067 states and 20474 transitions. Word has length 67 [2020-10-29 13:42:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:50,548 INFO L481 AbstractCegarLoop]: Abstraction has 14067 states and 20474 transitions. [2020-10-29 13:42:50,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:42:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14067 states and 20474 transitions. [2020-10-29 13:42:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:42:50,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:50,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:50,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:42:50,551 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash 493915250, now seen corresponding path program 1 times [2020-10-29 13:42:50,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:50,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782480268] [2020-10-29 13:42:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:51,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:42:51,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:42:51,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-29 13:42:51,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:51,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:42:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:42:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:52,664 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:42:52,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:52,713 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 13:42:52,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782480268] [2020-10-29 13:42:52,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:52,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:42:52,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506424048] [2020-10-29 13:42:52,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:52,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:52,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:52,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:52,715 INFO L87 Difference]: Start difference. First operand 14067 states and 20474 transitions. Second operand 6 states.