/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/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:42:39,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:42:39,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:42:39,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:42:39,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:42:39,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:42:39,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:42:39,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:42:39,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:42:39,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:42:39,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:42:39,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:42:39,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:42:39,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:42:39,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:42:39,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:42:39,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:42:39,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:42:39,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:42:39,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:42:39,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:42:39,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:42:39,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:42:39,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:42:39,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:42:39,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:42:39,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:42:39,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:42:39,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:42:39,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:42:39,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:42:39,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:42:39,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:42:39,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:42:39,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:42:39,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:42:39,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:42:39,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:42:39,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:42:39,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:42:39,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:42:39,984 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 09:42:40,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:42:40,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:42:40,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:42:40,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:42:40,020 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:42:40,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:42:40,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:42:40,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:42:40,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:42:40,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:42:40,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:42:40,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:42:40,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:42:40,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:42:40,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:42:40,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:42:40,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:42:40,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:42:40,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:42:40,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:42:40,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:42:40,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:42:40,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:42:40,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:42:40,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:42:40,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:42:40,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:42:40,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:42:40,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:42:40,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:42:40,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:42:40,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:42:40,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:42:40,557 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:42:40,558 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:42:40,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-29 09:42:40,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/692c14e9a/1fd467dcc20d449cbead089ff74fd11c/FLAG0dd87185e [2020-10-29 09:42:41,289 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:42:41,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-29 09:42:41,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/692c14e9a/1fd467dcc20d449cbead089ff74fd11c/FLAG0dd87185e [2020-10-29 09:42:41,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/692c14e9a/1fd467dcc20d449cbead089ff74fd11c [2020-10-29 09:42:41,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:42:41,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:42:41,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:42:41,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:42:41,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:42:41,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:41,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e53070d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41, skipping insertion in model container [2020-10-29 09:42:41,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:41,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:42:41,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:42:41,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:42:41,948 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:42:41,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:42:41,993 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:42:41,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41 WrapperNode [2020-10-29 09:42:41,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:42:41,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:42:41,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:42:41,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:42:42,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (1/1) ... [2020-10-29 09:42:42,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:42:42,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:42:42,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:42:42,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:42:42,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (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 09:42:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:42:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:42:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:42:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:42:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:42:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:42:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:42:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:42:42,512 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:42:42,513 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:42:42,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:42:42 BoogieIcfgContainer [2020-10-29 09:42:42,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:42:42,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:42:42,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:42:42,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:42:42,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:42:41" (1/3) ... [2020-10-29 09:42:42,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e084b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:42:42, skipping insertion in model container [2020-10-29 09:42:42,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:41" (2/3) ... [2020-10-29 09:42:42,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e084b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:42:42, skipping insertion in model container [2020-10-29 09:42:42,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:42:42" (3/3) ... [2020-10-29 09:42:42,525 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-29 09:42:42,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:42:42,544 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:42:42,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:42:42,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:42:42,589 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:42:42,589 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:42:42,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:42:42,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:42:42,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:42:42,590 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:42:42,590 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:42:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-29 09:42:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:42:42,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:42,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:42,627 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1023868445, now seen corresponding path program 1 times [2020-10-29 09:42:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:42,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634382633] [2020-10-29 09:42:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:42,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:42,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:42,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:43,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:43,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:43,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:42:43,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:42:43,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-29 09:42:43,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:43,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:42:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:42:43,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:42:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:42:43,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:43,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:43,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:43,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:43,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:43,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:42:43,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:43,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:43,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:43,470 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 09:42:43,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634382633] [2020-10-29 09:42:43,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:42:43,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:42:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419055817] [2020-10-29 09:42:43,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:42:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:42:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:42:43,499 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-29 09:42:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:43,821 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-10-29 09:42:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:42:43,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 09:42:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:43,831 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:42:43,832 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:42:43,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:42:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:42:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-29 09:42:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:42:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-29 09:42:43,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-10-29 09:42:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:43,883 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-29 09:42:43,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:42:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-29 09:42:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:42:43,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:43,884 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:43,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:42:43,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -125854589, now seen corresponding path program 1 times [2020-10-29 09:42:43,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:43,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184997709] [2020-10-29 09:42:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:43,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:44,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:42:44,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:44,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-29 09:42:44,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:44,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:42:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:42:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:42:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:44,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:44,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:42:44,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:44,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:44,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184997709] [2020-10-29 09:42:44,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:44,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:42:44,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144385624] [2020-10-29 09:42:44,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:42:44,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:42:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:42:44,382 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-29 09:42:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:44,645 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-29 09:42:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:42:44,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-29 09:42:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:44,647 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:42:44,648 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:42:44,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:42:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:42:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-29 09:42:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:42:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-29 09:42:44,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-29 09:42:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:44,658 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-29 09:42:44,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:42:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-29 09:42:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:42:44,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:44,659 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:42:44,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1615401410, now seen corresponding path program 2 times [2020-10-29 09:42:44,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:44,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706600826] [2020-10-29 09:42:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:44,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:45,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:45,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:42:45,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:45,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-29 09:42:45,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:45,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:42:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:42:45,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:45,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:45,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:45,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:45,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:42:45,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:45,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:45,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706600826] [2020-10-29 09:42:45,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:45,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:42:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422947112] [2020-10-29 09:42:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:42:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:45,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:42:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:42:45,144 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-29 09:42:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:45,421 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-29 09:42:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:42:45,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:42:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:45,424 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:42:45,425 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:42:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:42:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:42:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2020-10-29 09:42:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:42:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 09:42:45,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-29 09:42:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:45,443 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 09:42:45,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:42:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 09:42:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:42:45,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:45,445 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:45,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:42:45,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1449180473, now seen corresponding path program 3 times [2020-10-29 09:42:45,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:45,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551187316] [2020-10-29 09:42:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:45,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:45,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:45,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:42:45,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-29 09:42:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:45,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:42:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:42:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:42:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:42:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:45,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:45,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:45,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:45,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:42:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:45,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:45,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:42:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551187316] [2020-10-29 09:42:46,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:46,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:42:46,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753502836] [2020-10-29 09:42:46,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:42:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:42:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:42:46,006 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-29 09:42:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:46,353 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-29 09:42:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:42:46,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:42:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:46,354 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:42:46,355 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:42:46,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:42:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:42:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-29 09:42:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:42:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-29 09:42:46,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-29 09:42:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:46,362 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-29 09:42:46,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:42:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-29 09:42:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:42:46,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:46,363 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:46,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:42:46,363 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash 164804980, now seen corresponding path program 4 times [2020-10-29 09:42:46,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:46,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844095251] [2020-10-29 09:42:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:46,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:46,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:42:46,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:46,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-29 09:42:46,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:46,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:42:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:42:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:46,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:46,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:46,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:46,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:46,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:46,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:46,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:46,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:46,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:46,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844095251] [2020-10-29 09:42:46,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:46,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:42:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077252896] [2020-10-29 09:42:46,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:42:46,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:42:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:42:46,706 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 10 states. [2020-10-29 09:42:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:47,038 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-29 09:42:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:42:47,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:42:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:47,040 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:42:47,040 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:42:47,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:42:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:42:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 33. [2020-10-29 09:42:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:42:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 09:42:47,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-29 09:42:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:47,048 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 09:42:47,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:42:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 09:42:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:42:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:47,049 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:47,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:42:47,050 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1464429841, now seen corresponding path program 5 times [2020-10-29 09:42:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192067306] [2020-10-29 09:42:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:47,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:47,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:47,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:42:47,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-29 09:42:47,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:47,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:47,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:42:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:42:47,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:47,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:47,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:47,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:47,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:47,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:47,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:47,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:47,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:47,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:47,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192067306] [2020-10-29 09:42:47,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:47,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:42:47,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949711369] [2020-10-29 09:42:47,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:42:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:42:47,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:42:47,452 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-29 09:42:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:47,901 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-29 09:42:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:42:47,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 09:42:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:47,903 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:42:47,903 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:42:47,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:42:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:42:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2020-10-29 09:42:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:42:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-29 09:42:47,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-29 09:42:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:47,912 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-29 09:42:47,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:42:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-29 09:42:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:42:47,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:47,913 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:47,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:42:47,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash 503970218, now seen corresponding path program 6 times [2020-10-29 09:42:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:47,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638024218] [2020-10-29 09:42:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:47,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:42:48,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-29 09:42:48,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:48,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:42:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:42:48,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:42:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:48,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:48,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:48,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:48,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:48,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:48,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:48,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:48,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638024218] [2020-10-29 09:42:48,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:42:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856639766] [2020-10-29 09:42:48,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:42:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:42:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:42:48,452 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-10-29 09:42:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:49,038 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-10-29 09:42:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:42:49,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-29 09:42:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:49,040 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:42:49,040 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:42:49,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:42:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:42:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 34. [2020-10-29 09:42:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:42:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-29 09:42:49,047 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-29 09:42:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:49,047 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-29 09:42:49,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:42:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-29 09:42:49,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:42:49,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:49,048 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:49,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:42:49,049 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1944150619, now seen corresponding path program 7 times [2020-10-29 09:42:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:49,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422161118] [2020-10-29 09:42:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:42:49,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:49,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-29 09:42:49,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:42:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:49,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:42:49,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:49,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:49,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:42:49,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:49,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422161118] [2020-10-29 09:42:49,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:49,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:42:49,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531459127] [2020-10-29 09:42:49,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:42:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:42:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:42:49,427 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-10-29 09:42:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:50,009 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-29 09:42:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:42:50,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-29 09:42:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:50,011 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:42:50,011 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 09:42:50,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:42:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 09:42:50,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 39. [2020-10-29 09:42:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:42:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 09:42:50,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-29 09:42:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:50,035 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 09:42:50,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:42:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 09:42:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:42:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:50,037 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:50,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:42:50,041 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash -946196768, now seen corresponding path program 8 times [2020-10-29 09:42:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:50,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082919332] [2020-10-29 09:42:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:50,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:42:50,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:50,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-29 09:42:50,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:42:50,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:50,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:42:50,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:50,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:50,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:50,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:42:50,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:50,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:50,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:50,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:50,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082919332] [2020-10-29 09:42:50,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:50,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:42:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762806497] [2020-10-29 09:42:50,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:42:50,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:42:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:42:50,596 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-29 09:42:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:51,164 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-10-29 09:42:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:42:51,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 09:42:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:51,168 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:42:51,169 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:42:51,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:42:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:42:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 44. [2020-10-29 09:42:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:42:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-29 09:42:51,181 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-29 09:42:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:51,182 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-29 09:42:51,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:42:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-29 09:42:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:42:51,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:51,187 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:51,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:42:51,189 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash 309747035, now seen corresponding path program 9 times [2020-10-29 09:42:51,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:51,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483478221] [2020-10-29 09:42:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:51,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:51,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:42:51,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:51,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-29 09:42:51,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:51,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:42:51,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:51,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:42:51,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:52,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:52,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:52,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:52,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:52,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483478221] [2020-10-29 09:42:52,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:52,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:42:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587207828] [2020-10-29 09:42:52,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:42:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:42:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:42:52,035 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 15 states. [2020-10-29 09:42:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:52,720 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2020-10-29 09:42:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:42:52,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-29 09:42:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:52,722 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:42:52,722 INFO L226 Difference]: Without dead ends: 138 [2020-10-29 09:42:52,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:42:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-29 09:42:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 49. [2020-10-29 09:42:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:42:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-29 09:42:52,729 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 37 [2020-10-29 09:42:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:52,730 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-29 09:42:52,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:42:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-29 09:42:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:42:52,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:52,731 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:52,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:42:52,732 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 385931542, now seen corresponding path program 10 times [2020-10-29 09:42:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:52,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548723369] [2020-10-29 09:42:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:53,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:42:53,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-29 09:42:53,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:53,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:42:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:42:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:42:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:53,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:53,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:53,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:53,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:53,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:53,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:42:53,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:53,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:53,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:53,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:42:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:53,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548723369] [2020-10-29 09:42:53,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:53,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:42:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680745542] [2020-10-29 09:42:53,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:42:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:42:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:42:53,452 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2020-10-29 09:42:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:54,219 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2020-10-29 09:42:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:42:54,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-29 09:42:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:54,221 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:42:54,221 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:42:54,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:42:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:42:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 42. [2020-10-29 09:42:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:42:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-29 09:42:54,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-29 09:42:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:54,230 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-29 09:42:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:42:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-29 09:42:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:42:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:54,234 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:54,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:42:54,234 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 584798737, now seen corresponding path program 11 times [2020-10-29 09:42:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:54,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129604452] [2020-10-29 09:42:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:54,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:54,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:54,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:42:54,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:54,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-29 09:42:54,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:54,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:42:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:42:54,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:55,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:55,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:55,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:55,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:55,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:55,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129604452] [2020-10-29 09:42:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:42:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314128918] [2020-10-29 09:42:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:42:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:42:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:42:55,201 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-10-29 09:42:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:55,948 INFO L93 Difference]: Finished difference Result 242 states and 255 transitions. [2020-10-29 09:42:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:42:55,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-29 09:42:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:55,951 INFO L225 Difference]: With dead ends: 242 [2020-10-29 09:42:55,951 INFO L226 Difference]: Without dead ends: 234 [2020-10-29 09:42:55,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:42:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-29 09:42:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 47. [2020-10-29 09:42:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:42:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-29 09:42:55,966 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-29 09:42:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:55,966 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-29 09:42:55,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:42:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-29 09:42:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:42:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:55,969 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:55,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:42:55,970 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1577355188, now seen corresponding path program 12 times [2020-10-29 09:42:55,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:55,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604682898] [2020-10-29 09:42:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:56,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:56,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:42:56,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:56,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-29 09:42:56,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:56,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:42:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:42:56,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:56,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:56,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:56,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:56,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:56,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:56,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:42:56,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:56,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:56,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:56,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604682898] [2020-10-29 09:42:56,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:56,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:42:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273369779] [2020-10-29 09:42:56,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:42:56,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:42:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:42:56,891 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2020-10-29 09:42:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:57,758 INFO L93 Difference]: Finished difference Result 247 states and 261 transitions. [2020-10-29 09:42:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:42:57,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-29 09:42:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:57,760 INFO L225 Difference]: With dead ends: 247 [2020-10-29 09:42:57,760 INFO L226 Difference]: Without dead ends: 239 [2020-10-29 09:42:57,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:42:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-29 09:42:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 52. [2020-10-29 09:42:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:42:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-29 09:42:57,770 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2020-10-29 09:42:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:57,772 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-29 09:42:57,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:42:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-29 09:42:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:42:57,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:57,773 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:57,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:42:57,773 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash -643105849, now seen corresponding path program 13 times [2020-10-29 09:42:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:57,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784958636] [2020-10-29 09:42:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:58,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:58,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:42:58,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-29 09:42:58,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:58,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:42:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:42:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:42:58,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:58,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:58,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:58,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:58,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:58,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:42:58,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:58,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:58,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:58,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784958636] [2020-10-29 09:42:58,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:58,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:42:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894189777] [2020-10-29 09:42:58,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:42:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:42:58,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:42:58,970 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 19 states. [2020-10-29 09:42:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:59,841 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2020-10-29 09:42:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:42:59,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-29 09:42:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:59,843 INFO L225 Difference]: With dead ends: 252 [2020-10-29 09:42:59,844 INFO L226 Difference]: Without dead ends: 244 [2020-10-29 09:42:59,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:42:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-29 09:42:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 57. [2020-10-29 09:42:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:42:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-29 09:42:59,851 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2020-10-29 09:42:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:59,851 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-29 09:42:59,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:42:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-29 09:42:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:42:59,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:59,852 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:59,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:42:59,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash -477655934, now seen corresponding path program 14 times [2020-10-29 09:42:59,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:59,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484767421] [2020-10-29 09:42:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:00,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:43:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:00,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:43:00,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:00,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:00,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:00,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:00,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:00,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:00,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:00,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484767421] [2020-10-29 09:43:00,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:43:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052817533] [2020-10-29 09:43:00,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:43:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:43:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:43:00,952 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2020-10-29 09:43:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:01,943 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2020-10-29 09:43:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:43:01,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-29 09:43:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:01,946 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:43:01,947 INFO L226 Difference]: Without dead ends: 173 [2020-10-29 09:43:01,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:43:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-29 09:43:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 50. [2020-10-29 09:43:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:43:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-29 09:43:01,953 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-29 09:43:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:01,953 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-29 09:43:01,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:43:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-29 09:43:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:43:01,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:01,954 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:01,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:43:01,954 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash -394077571, now seen corresponding path program 15 times [2020-10-29 09:43:01,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:01,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940201433] [2020-10-29 09:43:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:43:02,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:02,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:43:02,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:02,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:02,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:02,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:02,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:02,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:02,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:02,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940201433] [2020-10-29 09:43:02,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:02,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:43:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789749172] [2020-10-29 09:43:02,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:43:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:43:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:43:02,909 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2020-10-29 09:43:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:03,942 INFO L93 Difference]: Finished difference Result 378 states and 395 transitions. [2020-10-29 09:43:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:43:03,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-29 09:43:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:03,945 INFO L225 Difference]: With dead ends: 378 [2020-10-29 09:43:03,946 INFO L226 Difference]: Without dead ends: 370 [2020-10-29 09:43:03,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:43:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-29 09:43:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 55. [2020-10-29 09:43:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:43:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-29 09:43:03,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-29 09:43:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:03,962 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-29 09:43:03,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:43:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-29 09:43:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:43:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:03,962 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:03,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:43:03,963 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1679649352, now seen corresponding path program 16 times [2020-10-29 09:43:03,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:03,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033902888] [2020-10-29 09:43:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:03,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:04,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:43:04,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:43:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:04,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:04,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:04,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:04,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033902888] [2020-10-29 09:43:04,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:04,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:43:04,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809009664] [2020-10-29 09:43:05,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:43:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:43:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:43:05,001 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-29 09:43:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:06,124 INFO L93 Difference]: Finished difference Result 383 states and 401 transitions. [2020-10-29 09:43:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:43:06,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-29 09:43:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:06,127 INFO L225 Difference]: With dead ends: 383 [2020-10-29 09:43:06,127 INFO L226 Difference]: Without dead ends: 375 [2020-10-29 09:43:06,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:43:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-29 09:43:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 60. [2020-10-29 09:43:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:43:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-29 09:43:06,134 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2020-10-29 09:43:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:06,134 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-29 09:43:06,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:43:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-29 09:43:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:43:06,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:06,136 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:06,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:43:06,136 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:06,137 INFO L82 PathProgramCache]: Analyzing trace with hash -163549645, now seen corresponding path program 17 times [2020-10-29 09:43:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:06,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599744698] [2020-10-29 09:43:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:06,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:06,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:06,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:43:06,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:06,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-29 09:43:06,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:06,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:43:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:43:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:07,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:07,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:07,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:07,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:07,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599744698] [2020-10-29 09:43:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:43:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032795536] [2020-10-29 09:43:07,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:43:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:43:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:43:07,202 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 23 states. [2020-10-29 09:43:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:08,420 INFO L93 Difference]: Finished difference Result 388 states and 407 transitions. [2020-10-29 09:43:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:43:08,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-29 09:43:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:08,423 INFO L225 Difference]: With dead ends: 388 [2020-10-29 09:43:08,423 INFO L226 Difference]: Without dead ends: 380 [2020-10-29 09:43:08,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:43:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-29 09:43:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 65. [2020-10-29 09:43:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:43:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-29 09:43:08,430 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2020-10-29 09:43:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:08,430 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-29 09:43:08,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:43:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-29 09:43:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:43:08,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:08,431 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:08,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:43:08,431 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash 814355438, now seen corresponding path program 18 times [2020-10-29 09:43:08,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:08,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273706625] [2020-10-29 09:43:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:09,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:09,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:43:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:09,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:09,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:09,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273706625] [2020-10-29 09:43:09,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:09,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:43:09,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851926357] [2020-10-29 09:43:09,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:43:09,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:09,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:43:09,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:43:09,506 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 24 states. [2020-10-29 09:43:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:10,996 INFO L93 Difference]: Finished difference Result 231 states and 254 transitions. [2020-10-29 09:43:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:43:10,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-29 09:43:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:10,998 INFO L225 Difference]: With dead ends: 231 [2020-10-29 09:43:10,999 INFO L226 Difference]: Without dead ends: 217 [2020-10-29 09:43:11,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:43:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-29 09:43:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 58. [2020-10-29 09:43:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:43:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-29 09:43:11,007 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-29 09:43:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:11,007 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-29 09:43:11,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:43:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-29 09:43:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:43:11,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:11,008 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:11,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:43:11,008 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -16697623, now seen corresponding path program 19 times [2020-10-29 09:43:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:11,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205937774] [2020-10-29 09:43:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:11,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-29 09:43:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:43:12,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:12,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:12,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:12,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205937774] [2020-10-29 09:43:12,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:12,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:43:12,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314884181] [2020-10-29 09:43:12,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:43:12,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:43:12,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:43:12,498 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 25 states. [2020-10-29 09:43:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:13,828 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2020-10-29 09:43:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:43:13,829 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-29 09:43:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:13,830 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:43:13,831 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:43:13,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:43:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:43:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 60. [2020-10-29 09:43:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:43:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-29 09:43:13,837 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-29 09:43:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:13,838 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-29 09:43:13,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:43:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-29 09:43:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:43:13,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:13,839 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:13,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:43:13,839 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash 205227812, now seen corresponding path program 20 times [2020-10-29 09:43:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:13,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183622952] [2020-10-29 09:43:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:14,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:14,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:43:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:15,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:15,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:15,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:15,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:15,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:15,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:15,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183622952] [2020-10-29 09:43:15,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:15,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:43:15,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764089513] [2020-10-29 09:43:15,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:43:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:43:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:43:15,345 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 26 states. [2020-10-29 09:43:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:16,922 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2020-10-29 09:43:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:43:16,923 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-29 09:43:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:16,925 INFO L225 Difference]: With dead ends: 133 [2020-10-29 09:43:16,925 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:43:16,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:43:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:43:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 62. [2020-10-29 09:43:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:43:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-29 09:43:16,930 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-29 09:43:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:16,931 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-29 09:43:16,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:43:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-29 09:43:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:43:16,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:16,932 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:16,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:43:16,932 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1272793953, now seen corresponding path program 21 times [2020-10-29 09:43:16,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:16,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687064069] [2020-10-29 09:43:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:18,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:18,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:43:18,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:18,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-29 09:43:18,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:18,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:18,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:43:18,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:18,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:18,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:18,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:18,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:18,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:18,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:18,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:18,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687064069] [2020-10-29 09:43:18,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:18,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:43:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040152765] [2020-10-29 09:43:18,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:43:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:43:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:43:18,613 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 27 states. [2020-10-29 09:43:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:20,233 INFO L93 Difference]: Finished difference Result 642 states and 665 transitions. [2020-10-29 09:43:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:43:20,236 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-29 09:43:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:20,239 INFO L225 Difference]: With dead ends: 642 [2020-10-29 09:43:20,239 INFO L226 Difference]: Without dead ends: 634 [2020-10-29 09:43:20,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:43:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-10-29 09:43:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 67. [2020-10-29 09:43:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:43:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-29 09:43:20,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-29 09:43:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:20,248 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-29 09:43:20,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:43:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-29 09:43:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:43:20,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:20,249 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:20,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:43:20,249 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -17535142, now seen corresponding path program 22 times [2020-10-29 09:43:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:20,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261961851] [2020-10-29 09:43:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:43:21,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:21,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:22,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:22,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:22,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:22,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:22,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:22,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:22,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:22,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261961851] [2020-10-29 09:43:22,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:22,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:43:22,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23074081] [2020-10-29 09:43:22,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:43:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:22,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:43:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:43:22,028 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2020-10-29 09:43:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:23,816 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2020-10-29 09:43:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:43:23,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-29 09:43:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:23,818 INFO L225 Difference]: With dead ends: 189 [2020-10-29 09:43:23,818 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:43:23,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:43:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:43:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 66. [2020-10-29 09:43:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:43:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-29 09:43:23,825 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-10-29 09:43:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:23,826 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-29 09:43:23,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:43:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-29 09:43:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:43:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:23,827 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:23,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:43:23,827 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -599627947, now seen corresponding path program 23 times [2020-10-29 09:43:23,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:23,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886178651] [2020-10-29 09:43:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:25,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:25,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1272 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:43:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:25,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:25,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:25,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:25,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:25,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:25,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:25,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:25,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886178651] [2020-10-29 09:43:25,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:25,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:43:25,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122400022] [2020-10-29 09:43:25,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:43:25,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:43:25,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:43:25,688 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 29 states. [2020-10-29 09:43:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:27,450 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2020-10-29 09:43:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:43:27,450 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-29 09:43:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:27,452 INFO L225 Difference]: With dead ends: 148 [2020-10-29 09:43:27,452 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:43:27,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:43:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:43:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 68. [2020-10-29 09:43:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:43:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-29 09:43:27,459 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-29 09:43:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:27,459 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-29 09:43:27,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:43:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-29 09:43:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:43:27,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:27,460 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:27,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:43:27,460 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1645065072, now seen corresponding path program 24 times [2020-10-29 09:43:27,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:27,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685456711] [2020-10-29 09:43:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:27,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:28,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:28,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 09:43:28,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:43:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:29,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:29,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:29,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:29,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:29,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:29,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685456711] [2020-10-29 09:43:29,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:29,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:43:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532436790] [2020-10-29 09:43:29,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:43:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:43:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:43:29,332 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 30 states. [2020-10-29 09:43:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:31,241 INFO L93 Difference]: Finished difference Result 799 states and 825 transitions. [2020-10-29 09:43:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:43:31,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-29 09:43:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:31,246 INFO L225 Difference]: With dead ends: 799 [2020-10-29 09:43:31,247 INFO L226 Difference]: Without dead ends: 791 [2020-10-29 09:43:31,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:43:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-10-29 09:43:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 73. [2020-10-29 09:43:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:43:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-29 09:43:31,257 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-29 09:43:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:31,258 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-29 09:43:31,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:43:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-29 09:43:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:43:31,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:31,259 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:31,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:43:31,259 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1287794933, now seen corresponding path program 25 times [2020-10-29 09:43:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:31,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348903173] [2020-10-29 09:43:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:32,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:43:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:32,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:43:32,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:32,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348903173] [2020-10-29 09:43:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:32,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:43:32,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497648042] [2020-10-29 09:43:32,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:43:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:43:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:43:32,948 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2020-10-29 09:43:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:35,058 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2020-10-29 09:43:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:43:35,059 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-29 09:43:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:35,061 INFO L225 Difference]: With dead ends: 210 [2020-10-29 09:43:35,061 INFO L226 Difference]: Without dead ends: 200 [2020-10-29 09:43:35,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:43:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-29 09:43:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 72. [2020-10-29 09:43:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:43:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-29 09:43:35,068 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-29 09:43:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:35,068 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-29 09:43:35,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:43:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-29 09:43:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 09:43:35,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:35,069 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:35,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:43:35,069 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1548575034, now seen corresponding path program 26 times [2020-10-29 09:43:35,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:35,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485341130] [2020-10-29 09:43:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:35,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:35,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:43:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:36,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:36,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:36,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:36,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:36,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:36,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485341130] [2020-10-29 09:43:36,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:36,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:43:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351943169] [2020-10-29 09:43:36,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:43:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:43:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:43:36,693 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 32 states. [2020-10-29 09:43:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:38,730 INFO L93 Difference]: Finished difference Result 917 states and 945 transitions. [2020-10-29 09:43:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:43:38,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-29 09:43:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:38,736 INFO L225 Difference]: With dead ends: 917 [2020-10-29 09:43:38,737 INFO L226 Difference]: Without dead ends: 909 [2020-10-29 09:43:38,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:43:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-29 09:43:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 77. [2020-10-29 09:43:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:43:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-29 09:43:38,750 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-29 09:43:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:38,750 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-29 09:43:38,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:43:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-29 09:43:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:43:38,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:38,751 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:38,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:43:38,752 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1244818369, now seen corresponding path program 27 times [2020-10-29 09:43:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:38,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476002569] [2020-10-29 09:43:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:38,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:43:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:40,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:40,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:40,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:40,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476002569] [2020-10-29 09:43:40,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:40,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:43:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154737011] [2020-10-29 09:43:40,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:43:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:43:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:43:40,701 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2020-10-29 09:43:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:42,980 INFO L93 Difference]: Finished difference Result 224 states and 254 transitions. [2020-10-29 09:43:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:43:42,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-29 09:43:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:42,982 INFO L225 Difference]: With dead ends: 224 [2020-10-29 09:43:42,982 INFO L226 Difference]: Without dead ends: 214 [2020-10-29 09:43:42,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:43:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-29 09:43:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 76. [2020-10-29 09:43:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:43:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-29 09:43:42,988 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-10-29 09:43:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:42,988 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-29 09:43:42,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:43:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-29 09:43:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:43:42,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:42,989 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:42,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:43:42,989 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1341318652, now seen corresponding path program 28 times [2020-10-29 09:43:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:42,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968289183] [2020-10-29 09:43:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:43,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:43,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:43:44,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:44,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:44,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:44,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:44,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968289183] [2020-10-29 09:43:44,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:44,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:43:44,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851806706] [2020-10-29 09:43:44,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:43:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:44,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:43:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:43:44,817 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 34 states. [2020-10-29 09:43:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:47,000 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2020-10-29 09:43:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:43:47,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-29 09:43:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:47,003 INFO L225 Difference]: With dead ends: 173 [2020-10-29 09:43:47,003 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:43:47,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:43:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:43:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 78. [2020-10-29 09:43:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:43:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-29 09:43:47,011 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-29 09:43:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:47,011 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-29 09:43:47,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:43:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-29 09:43:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 09:43:47,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:47,012 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:47,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:43:47,013 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash -411189897, now seen corresponding path program 29 times [2020-10-29 09:43:47,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:47,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014784678] [2020-10-29 09:43:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:49,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:49,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:43:49,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 09:43:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:49,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:49,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:49,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:49,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:49,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014784678] [2020-10-29 09:43:49,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:49,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:43:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408647494] [2020-10-29 09:43:49,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:43:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:43:49,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:43:49,840 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 35 states. [2020-10-29 09:43:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:52,258 INFO L93 Difference]: Finished difference Result 1106 states and 1137 transitions. [2020-10-29 09:43:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:43:52,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-29 09:43:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:52,265 INFO L225 Difference]: With dead ends: 1106 [2020-10-29 09:43:52,266 INFO L226 Difference]: Without dead ends: 1098 [2020-10-29 09:43:52,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:43:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-10-29 09:43:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 83. [2020-10-29 09:43:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:43:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-29 09:43:52,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-29 09:43:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:52,279 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-29 09:43:52,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:43:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-29 09:43:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 09:43:52,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:52,280 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:52,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:43:52,280 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -944725454, now seen corresponding path program 30 times [2020-10-29 09:43:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:52,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392210814] [2020-10-29 09:43:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1581 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:53,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 09:43:53,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:54,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:54,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:54,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392210814] [2020-10-29 09:43:54,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:54,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:43:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799179212] [2020-10-29 09:43:54,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:43:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:54,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:43:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:43:54,748 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2020-10-29 09:43:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:57,223 INFO L93 Difference]: Finished difference Result 245 states and 278 transitions. [2020-10-29 09:43:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:43:57,224 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-29 09:43:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:57,226 INFO L225 Difference]: With dead ends: 245 [2020-10-29 09:43:57,226 INFO L226 Difference]: Without dead ends: 235 [2020-10-29 09:43:57,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:43:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-29 09:43:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 82. [2020-10-29 09:43:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:43:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-29 09:43:57,231 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-29 09:43:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:57,231 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-29 09:43:57,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:43:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-29 09:43:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 09:43:57,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:57,232 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:57,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:43:57,232 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1723679789, now seen corresponding path program 31 times [2020-10-29 09:43:57,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:57,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572576589] [2020-10-29 09:43:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:58,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:58,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 09:43:58,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:43:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:59,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:59,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:59,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572576589] [2020-10-29 09:43:59,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:59,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:43:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202875010] [2020-10-29 09:43:59,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:43:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:43:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:43:59,168 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 37 states. [2020-10-29 09:44:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:01,892 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2020-10-29 09:44:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:44:01,893 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-29 09:44:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:01,894 INFO L225 Difference]: With dead ends: 188 [2020-10-29 09:44:01,895 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 09:44:01,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:44:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 09:44:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 84. [2020-10-29 09:44:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:44:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-29 09:44:01,900 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2020-10-29 09:44:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:01,900 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-29 09:44:01,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:44:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-29 09:44:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 09:44:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:01,901 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:01,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:44:01,902 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1965642600, now seen corresponding path program 32 times [2020-10-29 09:44:01,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:01,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545936524] [2020-10-29 09:44:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:01,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:02,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:03,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:03,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 09:44:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:04,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:04,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:04,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:04,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:04,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:04,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:04,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545936524] [2020-10-29 09:44:04,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:04,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:44:04,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599428656] [2020-10-29 09:44:04,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:44:04,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:44:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:44:04,254 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 38 states. [2020-10-29 09:44:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:07,021 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2020-10-29 09:44:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:44:07,022 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-29 09:44:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:07,023 INFO L225 Difference]: With dead ends: 193 [2020-10-29 09:44:07,024 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:44:07,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:44:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:44:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 86. [2020-10-29 09:44:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:44:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-29 09:44:07,029 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2020-10-29 09:44:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:07,029 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-29 09:44:07,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:44:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-29 09:44:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 09:44:07,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:07,031 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:07,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:44:07,031 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1731297309, now seen corresponding path program 33 times [2020-10-29 09:44:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:07,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159094853] [2020-10-29 09:44:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:07,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:08,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:44:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:44:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:44:08,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:09,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:09,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:09,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:09,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:09,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:09,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159094853] [2020-10-29 09:44:09,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:09,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:44:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756889351] [2020-10-29 09:44:09,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:44:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:44:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:44:09,182 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 39 states. [2020-10-29 09:44:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:12,000 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2020-10-29 09:44:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:44:12,001 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-29 09:44:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:12,002 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:44:12,002 INFO L226 Difference]: Without dead ends: 190 [2020-10-29 09:44:12,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:44:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-29 09:44:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 88. [2020-10-29 09:44:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:44:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-29 09:44:12,008 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2020-10-29 09:44:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:12,008 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-29 09:44:12,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:44:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-29 09:44:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 09:44:12,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:12,009 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:12,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:44:12,009 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1742371230, now seen corresponding path program 34 times [2020-10-29 09:44:12,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:12,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609902719] [2020-10-29 09:44:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:13,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 09:44:13,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:14,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:14,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:14,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:14,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609902719] [2020-10-29 09:44:14,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:14,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:44:14,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882222438] [2020-10-29 09:44:14,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:44:14,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:44:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:44:14,581 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 40 states. [2020-10-29 09:44:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:17,650 INFO L93 Difference]: Finished difference Result 1461 states and 1497 transitions. [2020-10-29 09:44:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:44:17,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-29 09:44:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:17,657 INFO L225 Difference]: With dead ends: 1461 [2020-10-29 09:44:17,657 INFO L226 Difference]: Without dead ends: 1453 [2020-10-29 09:44:17,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:44:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2020-10-29 09:44:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 93. [2020-10-29 09:44:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:44:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-29 09:44:17,670 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2020-10-29 09:44:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:17,670 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-29 09:44:17,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:44:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-29 09:44:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-29 09:44:17,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:17,671 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:17,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:44:17,671 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1546719079, now seen corresponding path program 35 times [2020-10-29 09:44:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:17,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913838640] [2020-10-29 09:44:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:17,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:18,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:19,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:19,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 09:44:19,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 09:44:19,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:20,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:20,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:20,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:44:20,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:20,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:20,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913838640] [2020-10-29 09:44:20,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:20,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:44:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751830128] [2020-10-29 09:44:20,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:44:20,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:44:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:44:20,600 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2020-10-29 09:44:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:23,719 INFO L93 Difference]: Finished difference Result 1466 states and 1503 transitions. [2020-10-29 09:44:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:44:23,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-29 09:44:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:23,724 INFO L225 Difference]: With dead ends: 1466 [2020-10-29 09:44:23,724 INFO L226 Difference]: Without dead ends: 1458 [2020-10-29 09:44:23,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:44:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-10-29 09:44:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 98. [2020-10-29 09:44:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:44:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-29 09:44:23,736 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 89 [2020-10-29 09:44:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:23,737 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-29 09:44:23,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:44:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-29 09:44:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 09:44:23,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:23,738 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:23,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:44:23,738 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:23,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:23,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1266576172, now seen corresponding path program 36 times [2020-10-29 09:44:23,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:23,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596409158] [2020-10-29 09:44:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:23,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:24,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:24,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:24,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 09:44:24,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:24,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-29 09:44:24,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:24,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:24,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:44:24,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:24,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 09:44:24,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:26,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:26,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596409158] [2020-10-29 09:44:26,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:26,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:44:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064320464] [2020-10-29 09:44:26,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:44:26,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:44:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:44:26,031 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 42 states. [2020-10-29 09:44:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:29,233 INFO L93 Difference]: Finished difference Result 1471 states and 1509 transitions. [2020-10-29 09:44:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:44:29,234 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-29 09:44:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:29,240 INFO L225 Difference]: With dead ends: 1471 [2020-10-29 09:44:29,240 INFO L226 Difference]: Without dead ends: 1463 [2020-10-29 09:44:29,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:44:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-10-29 09:44:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 103. [2020-10-29 09:44:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:44:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-29 09:44:29,252 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-29 09:44:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:29,252 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-29 09:44:29,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:44:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-29 09:44:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 09:44:29,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:29,253 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:29,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:44:29,253 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:29,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1662785103, now seen corresponding path program 37 times [2020-10-29 09:44:29,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:29,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730952849] [2020-10-29 09:44:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:30,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:30,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 09:44:30,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-29 09:44:30,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:31,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:31,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730952849] [2020-10-29 09:44:31,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:31,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:44:31,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012618439] [2020-10-29 09:44:31,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:44:31,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:31,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:44:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:44:31,471 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 43 states. [2020-10-29 09:44:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:34,811 INFO L93 Difference]: Finished difference Result 1476 states and 1515 transitions. [2020-10-29 09:44:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:44:34,812 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-29 09:44:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:34,818 INFO L225 Difference]: With dead ends: 1476 [2020-10-29 09:44:34,818 INFO L226 Difference]: Without dead ends: 1468 [2020-10-29 09:44:34,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:44:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2020-10-29 09:44:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 108. [2020-10-29 09:44:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:44:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-29 09:44:34,830 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 93 [2020-10-29 09:44:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:34,830 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-29 09:44:34,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:44:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-29 09:44:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 09:44:34,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:34,831 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:34,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:44:34,832 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:34,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:34,832 INFO L82 PathProgramCache]: Analyzing trace with hash -719575798, now seen corresponding path program 38 times [2020-10-29 09:44:34,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:34,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066950148] [2020-10-29 09:44:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 09:44:36,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:37,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:37,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:37,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:37,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:37,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066950148] [2020-10-29 09:44:37,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:37,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:44:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797964015] [2020-10-29 09:44:37,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:44:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:44:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:44:37,630 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 44 states. [2020-10-29 09:44:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:41,004 INFO L93 Difference]: Finished difference Result 1481 states and 1521 transitions. [2020-10-29 09:44:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:44:41,005 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-29 09:44:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:41,010 INFO L225 Difference]: With dead ends: 1481 [2020-10-29 09:44:41,010 INFO L226 Difference]: Without dead ends: 1473 [2020-10-29 09:44:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:44:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-29 09:44:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 113. [2020-10-29 09:44:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:44:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2020-10-29 09:44:41,018 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 95 [2020-10-29 09:44:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:41,018 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2020-10-29 09:44:41,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:44:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2020-10-29 09:44:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 09:44:41,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:41,019 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:41,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:44:41,019 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash -950832891, now seen corresponding path program 39 times [2020-10-29 09:44:41,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:41,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697315984] [2020-10-29 09:44:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:41,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:41,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:42,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1420 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 09:44:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:43,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:43,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:43,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697315984] [2020-10-29 09:44:43,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:43,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:44:43,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926462208] [2020-10-29 09:44:43,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:44:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:43,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:44:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:44:43,845 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand 45 states. [2020-10-29 09:44:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:47,600 INFO L93 Difference]: Finished difference Result 608 states and 654 transitions. [2020-10-29 09:44:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:44:47,601 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-29 09:44:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:47,604 INFO L225 Difference]: With dead ends: 608 [2020-10-29 09:44:47,604 INFO L226 Difference]: Without dead ends: 590 [2020-10-29 09:44:47,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:44:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-10-29 09:44:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 100. [2020-10-29 09:44:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:44:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-29 09:44:47,609 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-10-29 09:44:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:47,609 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-29 09:44:47,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:44:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-29 09:44:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 09:44:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:47,611 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:47,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:44:47,611 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 149400128, now seen corresponding path program 40 times [2020-10-29 09:44:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:47,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164649152] [2020-10-29 09:44:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:47,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:49,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:49,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 09:44:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-29 09:44:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:50,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:50,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:50,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:50,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164649152] [2020-10-29 09:44:50,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:50,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:44:50,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287316284] [2020-10-29 09:44:50,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:44:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:44:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:44:50,960 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 46 states. [2020-10-29 09:44:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:54,656 INFO L93 Difference]: Finished difference Result 1953 states and 1995 transitions. [2020-10-29 09:44:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:44:54,657 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-29 09:44:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:54,665 INFO L225 Difference]: With dead ends: 1953 [2020-10-29 09:44:54,665 INFO L226 Difference]: Without dead ends: 1945 [2020-10-29 09:44:54,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:44:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2020-10-29 09:44:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 105. [2020-10-29 09:44:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:44:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-29 09:44:54,675 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 99 [2020-10-29 09:44:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:54,675 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-29 09:44:54,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:44:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-29 09:44:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 09:44:54,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:54,676 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:54,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:44:54,676 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 911376571, now seen corresponding path program 41 times [2020-10-29 09:44:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:54,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645331926] [2020-10-29 09:44:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:54,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:55,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:44:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:44:57,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 09:44:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:59,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:59,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:59,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:59,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:59,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645331926] [2020-10-29 09:44:59,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:59,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:44:59,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020737628] [2020-10-29 09:44:59,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:44:59,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:44:59,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:44:59,175 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2020-10-29 09:45:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:03,063 INFO L93 Difference]: Finished difference Result 322 states and 366 transitions. [2020-10-29 09:45:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:45:03,064 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-29 09:45:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:03,066 INFO L225 Difference]: With dead ends: 322 [2020-10-29 09:45:03,066 INFO L226 Difference]: Without dead ends: 312 [2020-10-29 09:45:03,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:45:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-29 09:45:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 104. [2020-10-29 09:45:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:45:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-29 09:45:03,072 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2020-10-29 09:45:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:03,072 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-29 09:45:03,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:45:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-29 09:45:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 09:45:03,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:03,073 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:03,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:45:03,073 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1268669322, now seen corresponding path program 42 times [2020-10-29 09:45:03,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:03,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110688004] [2020-10-29 09:45:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:45:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:45:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:45:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:07,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:07,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:07,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:07,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:07,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:07,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:07,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:07,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110688004] [2020-10-29 09:45:07,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:07,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:45:07,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129906675] [2020-10-29 09:45:07,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:45:07,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:07,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:45:07,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:45:07,035 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 48 states. [2020-10-29 09:45:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:10,873 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2020-10-29 09:45:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:45:10,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-29 09:45:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:10,876 INFO L225 Difference]: With dead ends: 243 [2020-10-29 09:45:10,876 INFO L226 Difference]: Without dead ends: 235 [2020-10-29 09:45:10,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:45:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-29 09:45:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 106. [2020-10-29 09:45:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:45:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-29 09:45:10,880 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2020-10-29 09:45:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:10,881 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-29 09:45:10,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:45:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-29 09:45:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 09:45:10,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:10,882 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:10,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:45:10,882 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash -348732047, now seen corresponding path program 43 times [2020-10-29 09:45:10,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:10,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683824728] [2020-10-29 09:45:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:10,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:13,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:13,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 09:45:13,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:13,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2572 [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 09:45:13,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:15,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:15,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:15,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:15,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:15,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:15,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:45:15,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:15,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:15,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:15,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683824728] [2020-10-29 09:45:15,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:15,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:45:15,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602339826] [2020-10-29 09:45:15,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:45:15,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:45:15,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:45:15,070 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 49 states. [2020-10-29 09:45:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:19,123 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2020-10-29 09:45:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:45:19,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-29 09:45:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:19,126 INFO L225 Difference]: With dead ends: 248 [2020-10-29 09:45:19,126 INFO L226 Difference]: Without dead ends: 240 [2020-10-29 09:45:19,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:45:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-29 09:45:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 108. [2020-10-29 09:45:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:45:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-29 09:45:19,130 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2020-10-29 09:45:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:19,131 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-29 09:45:19,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:45:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-29 09:45:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 09:45:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:19,131 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:19,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:45:19,131 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1052273748, now seen corresponding path program 44 times [2020-10-29 09:45:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:19,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423544005] [2020-10-29 09:45:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:21,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:21,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 09:45:21,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2338 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 09:45:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:23,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:23,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:23,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:23,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:23,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:23,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:23,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:23,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423544005] [2020-10-29 09:45:23,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:23,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:45:23,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956167251] [2020-10-29 09:45:23,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:45:23,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:45:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:45:23,170 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 50 states. [2020-10-29 09:45:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:27,385 INFO L93 Difference]: Finished difference Result 2321 states and 2367 transitions. [2020-10-29 09:45:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:45:27,386 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-29 09:45:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:27,395 INFO L225 Difference]: With dead ends: 2321 [2020-10-29 09:45:27,395 INFO L226 Difference]: Without dead ends: 2313 [2020-10-29 09:45:27,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:45:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2020-10-29 09:45:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 113. [2020-10-29 09:45:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:45:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-29 09:45:27,417 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 107 [2020-10-29 09:45:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:27,417 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-29 09:45:27,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:45:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-29 09:45:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 09:45:27,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:27,418 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:27,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:45:27,419 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1448984359, now seen corresponding path program 45 times [2020-10-29 09:45:27,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:27,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834596124] [2020-10-29 09:45:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2451 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 09:45:29,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:31,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:31,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:31,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:31,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:31,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:31,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:31,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834596124] [2020-10-29 09:45:31,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:31,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:45:31,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740049079] [2020-10-29 09:45:31,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:45:31,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:31,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:45:31,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:45:31,656 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2020-10-29 09:45:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:36,025 INFO L93 Difference]: Finished difference Result 2326 states and 2373 transitions. [2020-10-29 09:45:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:45:36,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-29 09:45:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:36,033 INFO L225 Difference]: With dead ends: 2326 [2020-10-29 09:45:36,033 INFO L226 Difference]: Without dead ends: 2318 [2020-10-29 09:45:36,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:45:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2020-10-29 09:45:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 118. [2020-10-29 09:45:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:45:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-29 09:45:36,043 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2020-10-29 09:45:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:36,044 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-29 09:45:36,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:45:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-29 09:45:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 09:45:36,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:36,045 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:36,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:45:36,045 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -23660574, now seen corresponding path program 46 times [2020-10-29 09:45:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:36,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463703309] [2020-10-29 09:45:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:36,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:39,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 09:45:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:40,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:40,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:40,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:40,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463703309] [2020-10-29 09:45:40,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:40,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 09:45:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644043935] [2020-10-29 09:45:40,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 09:45:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 09:45:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:45:40,909 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 52 states. [2020-10-29 09:45:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:45,352 INFO L93 Difference]: Finished difference Result 2331 states and 2379 transitions. [2020-10-29 09:45:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:45:45,353 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-29 09:45:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:45,362 INFO L225 Difference]: With dead ends: 2331 [2020-10-29 09:45:45,362 INFO L226 Difference]: Without dead ends: 2323 [2020-10-29 09:45:45,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2020-10-29 09:45:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2020-10-29 09:45:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 123. [2020-10-29 09:45:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:45:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-29 09:45:45,372 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2020-10-29 09:45:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:45,373 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-29 09:45:45,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 09:45:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-29 09:45:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-29 09:45:45,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:45,373 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:45,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:45:45,374 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2103766493, now seen corresponding path program 47 times [2020-10-29 09:45:45,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:45,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419893385] [2020-10-29 09:45:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:45,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:48,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:48,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3106 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 09:45:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:50,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:50,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:50,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:50,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:50,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:50,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:50,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419893385] [2020-10-29 09:45:50,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:50,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:45:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017321266] [2020-10-29 09:45:50,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:45:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:45:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:45:50,391 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 53 states. [2020-10-29 09:45:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:55,053 INFO L93 Difference]: Finished difference Result 2336 states and 2385 transitions. [2020-10-29 09:45:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 09:45:55,054 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-29 09:45:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:55,062 INFO L225 Difference]: With dead ends: 2336 [2020-10-29 09:45:55,063 INFO L226 Difference]: Without dead ends: 2328 [2020-10-29 09:45:55,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2020-10-29 09:45:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2020-10-29 09:45:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 128. [2020-10-29 09:45:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:45:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-10-29 09:45:55,074 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2020-10-29 09:45:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:55,075 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-10-29 09:45:55,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 09:45:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-10-29 09:45:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-29 09:45:55,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:55,076 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:55,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:45:55,076 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2138222312, now seen corresponding path program 48 times [2020-10-29 09:45:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:55,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654819664] [2020-10-29 09:45:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:55,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:58,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 09:45:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:45:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3045 [2020-10-29 09:45:58,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:58,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 09:45:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:45:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 09:45:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:00,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:00,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:00,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:00,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654819664] [2020-10-29 09:46:00,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:00,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-29 09:46:00,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957207753] [2020-10-29 09:46:00,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-29 09:46:00,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-29 09:46:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:46:00,187 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 54 states. [2020-10-29 09:46:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:05,242 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2020-10-29 09:46:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-29 09:46:05,242 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 115 [2020-10-29 09:46:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:05,246 INFO L225 Difference]: With dead ends: 653 [2020-10-29 09:46:05,246 INFO L226 Difference]: Without dead ends: 637 [2020-10-29 09:46:05,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2020-10-29 09:46:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-29 09:46:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 118. [2020-10-29 09:46:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:46:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-10-29 09:46:05,253 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2020-10-29 09:46:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:05,253 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-10-29 09:46:05,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-29 09:46:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-10-29 09:46:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 09:46:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:05,254 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:05,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:46:05,254 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1529467283, now seen corresponding path program 49 times [2020-10-29 09:46:05,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:05,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87316978] [2020-10-29 09:46:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:09,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:09,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-29 09:46:09,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:46:09,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 09:46:09,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:11,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:11,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:11,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:11,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:11,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87316978] [2020-10-29 09:46:11,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 09:46:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16558341] [2020-10-29 09:46:11,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 09:46:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 09:46:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:46:11,065 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 55 states. [2020-10-29 09:46:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:15,945 INFO L93 Difference]: Finished difference Result 2826 states and 2877 transitions. [2020-10-29 09:46:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-29 09:46:15,946 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-10-29 09:46:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:15,958 INFO L225 Difference]: With dead ends: 2826 [2020-10-29 09:46:15,958 INFO L226 Difference]: Without dead ends: 2818 [2020-10-29 09:46:15,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2020-10-29 09:46:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2020-10-29 09:46:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 123. [2020-10-29 09:46:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:46:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-29 09:46:15,970 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 117 [2020-10-29 09:46:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:15,970 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-29 09:46:15,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 09:46:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-29 09:46:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 09:46:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:15,971 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:15,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:46:15,971 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash 11018062, now seen corresponding path program 50 times [2020-10-29 09:46:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415443115] [2020-10-29 09:46:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:16,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:18,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:18,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 09:46:18,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:46:18,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2895 [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 09:46:18,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415443115] [2020-10-29 09:46:21,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:21,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-29 09:46:21,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965477127] [2020-10-29 09:46:21,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-29 09:46:21,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-29 09:46:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:46:21,111 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states.