/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:40:37,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:40:37,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:40:37,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:40:37,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:40:37,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:40:37,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:40:37,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:40:37,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:40:37,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:40:37,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:40:37,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:40:37,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:40:37,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:40:37,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:40:37,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:40:37,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:40:37,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:40:37,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:40:37,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:40:37,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:40:37,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:40:37,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:40:37,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:40:37,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:40:37,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:40:37,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:40:37,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:40:37,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:40:37,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:40:37,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:40:37,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:40:37,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:40:37,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:40:37,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:40:37,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:40:37,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:40:37,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:40:37,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:40:37,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:40:37,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:40:37,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:40:37,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:40:37,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:40:37,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:40:37,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:40:37,681 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:40:37,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:40:37,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:40:37,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:40:37,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:40:37,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:40:37,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:40:37,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:40:37,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:40:37,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:40:37,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:40:37,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:40:37,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:40:37,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:40:37,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:40:37,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:40:37,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:40:37,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:40:37,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:40:37,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:40:37,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:40:37,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:40:37,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:40:37,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:40:37,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:40:37,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:40:38,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:40:38,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:40:38,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:40:38,137 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:40:38,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:40:38,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:40:38,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e90e9834/976a183e61ce421898aec3e30669826f/FLAG0b4b6cf2a [2020-10-29 13:40:38,949 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:40:38,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:40:38,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e90e9834/976a183e61ce421898aec3e30669826f/FLAG0b4b6cf2a [2020-10-29 13:40:39,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e90e9834/976a183e61ce421898aec3e30669826f [2020-10-29 13:40:39,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:40:39,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:40:39,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:39,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:40:39,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:40:39,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9fbcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39, skipping insertion in model container [2020-10-29 13:40:39,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:40:39,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:40:39,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:39,643 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:40:39,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:40:39,786 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:40:39,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39 WrapperNode [2020-10-29 13:40:39,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:40:39,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:40:39,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:40:39,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:40:39,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... [2020-10-29 13:40:39,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:40:39,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:40:39,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:40:39,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:40:39,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:40:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:40:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:40:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:40:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:40:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:40:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:40:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:40:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:40:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:40:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:40:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:40:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:40:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:40:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:40:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:40:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:40:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:40:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:40:41,018 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:40:41,018 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:40:41,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:41 BoogieIcfgContainer [2020-10-29 13:40:41,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:40:41,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:40:41,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:40:41,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:40:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:40:39" (1/3) ... [2020-10-29 13:40:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e27e6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:41, skipping insertion in model container [2020-10-29 13:40:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:40:39" (2/3) ... [2020-10-29 13:40:41,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e27e6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:41, skipping insertion in model container [2020-10-29 13:40:41,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:41" (3/3) ... [2020-10-29 13:40:41,029 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-29 13:40:41,041 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:40:41,047 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:40:41,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:40:41,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:40:41,084 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:40:41,085 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:40:41,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:40:41,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:40:41,085 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:40:41,085 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:40:41,085 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:40:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-29 13:40:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:40:41,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:41,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:41,118 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-29 13:40:41,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:41,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50768033] [2020-10-29 13:40:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:41,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:43,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:43,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:40:43,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:43,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2101 [2020-10-29 13:40:43,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:43,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:40:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:40:43,832 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:43,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:43,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:43,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:40:43,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:43,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:43,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:43,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:43,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:43,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50768033] [2020-10-29 13:40:43,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:43,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574626046] [2020-10-29 13:40:43,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:43,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:43,981 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 6 states. [2020-10-29 13:40:44,253 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:40:44,983 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:40:45,175 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:40:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:45,767 INFO L93 Difference]: Finished difference Result 533 states and 855 transitions. [2020-10-29 13:40:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:45,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-29 13:40:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:45,788 INFO L225 Difference]: With dead ends: 533 [2020-10-29 13:40:45,788 INFO L226 Difference]: Without dead ends: 445 [2020-10-29 13:40:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:40:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-29 13:40:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 260. [2020-10-29 13:40:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-29 13:40:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 390 transitions. [2020-10-29 13:40:45,900 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 390 transitions. Word has length 54 [2020-10-29 13:40:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:45,901 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 390 transitions. [2020-10-29 13:40:45,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 390 transitions. [2020-10-29 13:40:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:40:45,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:45,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:45,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:40:45,908 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1142379061, now seen corresponding path program 1 times [2020-10-29 13:40:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:45,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780355504] [2020-10-29 13:40:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:46,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:50,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:50,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:40:50,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:40:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:50,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:40:50,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:51,210 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:51,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:51,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:51,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:51,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:51,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:40:51,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:51,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780355504] [2020-10-29 13:40:51,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:51,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:51,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803871286] [2020-10-29 13:40:51,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:51,260 INFO L87 Difference]: Start difference. First operand 260 states and 390 transitions. Second operand 6 states. [2020-10-29 13:40:51,506 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:40:52,107 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:40:52,819 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:40:53,042 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:40:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:53,105 INFO L93 Difference]: Finished difference Result 634 states and 975 transitions. [2020-10-29 13:40:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:53,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:40:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:53,117 INFO L225 Difference]: With dead ends: 634 [2020-10-29 13:40:53,117 INFO L226 Difference]: Without dead ends: 569 [2020-10-29 13:40:53,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-29 13:40:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 412. [2020-10-29 13:40:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-29 13:40:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 630 transitions. [2020-10-29 13:40:53,193 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 630 transitions. Word has length 57 [2020-10-29 13:40:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:53,194 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 630 transitions. [2020-10-29 13:40:53,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 630 transitions. [2020-10-29 13:40:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:40:53,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:53,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:53,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:40:53,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:53,207 INFO L82 PathProgramCache]: Analyzing trace with hash -915987511, now seen corresponding path program 1 times [2020-10-29 13:40:53,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:53,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939923351] [2020-10-29 13:40:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:53,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:58,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:40:58,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:58,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4805 [2020-10-29 13:40:58,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:58,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:40:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:58,276 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:58,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:58,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:58,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:58,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:40:58,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:58,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:58,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:58,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939923351] [2020-10-29 13:40:58,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:58,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:58,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282650627] [2020-10-29 13:40:58,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:58,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:58,314 INFO L87 Difference]: Start difference. First operand 412 states and 630 transitions. Second operand 6 states. [2020-10-29 13:40:58,558 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:40:59,200 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:40:59,800 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:41:00,010 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:41:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:00,062 INFO L93 Difference]: Finished difference Result 803 states and 1237 transitions. [2020-10-29 13:41:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:41:00,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:41:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:00,067 INFO L225 Difference]: With dead ends: 803 [2020-10-29 13:41:00,067 INFO L226 Difference]: Without dead ends: 678 [2020-10-29 13:41:00,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:41:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-29 13:41:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 497. [2020-10-29 13:41:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-29 13:41:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 764 transitions. [2020-10-29 13:41:00,140 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 764 transitions. Word has length 57 [2020-10-29 13:41:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:00,141 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 764 transitions. [2020-10-29 13:41:00,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 764 transitions. [2020-10-29 13:41:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:41:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:00,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:00,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:41:00,144 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1907474551, now seen corresponding path program 1 times [2020-10-29 13:41:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:00,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293021989] [2020-10-29 13:41:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:00,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:05,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:05,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:41:05,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:41:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:41:05,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:05,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:41:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:41:05,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:05,454 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:05,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:05,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:05,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:41:05,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:05,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:05,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:05,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293021989] [2020-10-29 13:41:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:05,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:41:05,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887142442] [2020-10-29 13:41:05,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:05,496 INFO L87 Difference]: Start difference. First operand 497 states and 764 transitions. Second operand 6 states. [2020-10-29 13:41:05,729 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:06,310 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:41:06,924 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:41:07,113 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:41:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:07,190 INFO L93 Difference]: Finished difference Result 935 states and 1444 transitions. [2020-10-29 13:41:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:41:07,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:41:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:07,199 INFO L225 Difference]: With dead ends: 935 [2020-10-29 13:41:07,200 INFO L226 Difference]: Without dead ends: 810 [2020-10-29 13:41:07,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:41:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-10-29 13:41:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 588. [2020-10-29 13:41:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-29 13:41:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 908 transitions. [2020-10-29 13:41:07,261 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 908 transitions. Word has length 57 [2020-10-29 13:41:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:07,261 INFO L481 AbstractCegarLoop]: Abstraction has 588 states and 908 transitions. [2020-10-29 13:41:07,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 908 transitions. [2020-10-29 13:41:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:41:07,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:07,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:07,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:41:07,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -436925079, now seen corresponding path program 1 times [2020-10-29 13:41:07,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:07,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077063929] [2020-10-29 13:41:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:12,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:41:12,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:41:12,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:41:12,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:12,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:41:12,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,663 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:12,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:12,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:12,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:12,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:41:12,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:12,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:12,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:12,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077063929] [2020-10-29 13:41:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:41:12,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416340406] [2020-10-29 13:41:12,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:12,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:12,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:12,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:12,743 INFO L87 Difference]: Start difference. First operand 588 states and 908 transitions. Second operand 8 states. [2020-10-29 13:41:13,068 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:41:13,896 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:41:14,538 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:14,730 INFO L93 Difference]: Finished difference Result 2897 states and 4527 transitions. [2020-10-29 13:41:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:14,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 13:41:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:14,750 INFO L225 Difference]: With dead ends: 2897 [2020-10-29 13:41:14,750 INFO L226 Difference]: Without dead ends: 2651 [2020-10-29 13:41:14,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:41:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2020-10-29 13:41:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 630. [2020-10-29 13:41:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-10-29 13:41:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 968 transitions. [2020-10-29 13:41:14,841 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 968 transitions. Word has length 60 [2020-10-29 13:41:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:14,841 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 968 transitions. [2020-10-29 13:41:14,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 968 transitions. [2020-10-29 13:41:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:41:14,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:14,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:14,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:41:14,844 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:14,844 INFO L82 PathProgramCache]: Analyzing trace with hash -5227797, now seen corresponding path program 1 times [2020-10-29 13:41:14,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:14,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412483413] [2020-10-29 13:41:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:19,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:41:19,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:20,193 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:20,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:20,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:20,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:20,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:41:20,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:20,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:20,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:20,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:20,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412483413] [2020-10-29 13:41:20,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:20,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:41:20,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744951108] [2020-10-29 13:41:20,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:20,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:20,271 INFO L87 Difference]: Start difference. First operand 630 states and 968 transitions. Second operand 8 states. [2020-10-29 13:41:20,553 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:21,417 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:41:22,046 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:41:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:22,253 INFO L93 Difference]: Finished difference Result 2775 states and 4315 transitions. [2020-10-29 13:41:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:22,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-29 13:41:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:22,267 INFO L225 Difference]: With dead ends: 2775 [2020-10-29 13:41:22,267 INFO L226 Difference]: Without dead ends: 2274 [2020-10-29 13:41:22,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:41:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2020-10-29 13:41:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 706. [2020-10-29 13:41:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-10-29 13:41:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1062 transitions. [2020-10-29 13:41:22,364 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1062 transitions. Word has length 60 [2020-10-29 13:41:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:22,364 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1062 transitions. [2020-10-29 13:41:22,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1062 transitions. [2020-10-29 13:41:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:41:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:22,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:22,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:41:22,367 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1094195053, now seen corresponding path program 1 times [2020-10-29 13:41:22,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:22,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063004758] [2020-10-29 13:41:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:22,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:24,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:24,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:27,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:41:27,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:41:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:41:27,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:27,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:41:27,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:27,712 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:27,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:27,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:27,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:27,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:27,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063004758] [2020-10-29 13:41:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:27,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:41:27,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991263017] [2020-10-29 13:41:27,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:27,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:27,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:27,779 INFO L87 Difference]: Start difference. First operand 706 states and 1062 transitions. Second operand 8 states. [2020-10-29 13:41:27,984 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:28,811 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:41:29,447 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:41:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:29,619 INFO L93 Difference]: Finished difference Result 2558 states and 3888 transitions. [2020-10-29 13:41:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:29,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-29 13:41:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:29,631 INFO L225 Difference]: With dead ends: 2558 [2020-10-29 13:41:29,631 INFO L226 Difference]: Without dead ends: 1973 [2020-10-29 13:41:29,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:41:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2020-10-29 13:41:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 734. [2020-10-29 13:41:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-29 13:41:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1078 transitions. [2020-10-29 13:41:29,725 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1078 transitions. Word has length 61 [2020-10-29 13:41:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:29,725 INFO L481 AbstractCegarLoop]: Abstraction has 734 states and 1078 transitions. [2020-10-29 13:41:29,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1078 transitions. [2020-10-29 13:41:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 13:41:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:29,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:29,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:41:29,727 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1293485263, now seen corresponding path program 1 times [2020-10-29 13:41:29,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:29,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159448571] [2020-10-29 13:41:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:29,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:34,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:34,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:34,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:41:34,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:34,962 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:34,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:34,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:34,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:34,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:34,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159448571] [2020-10-29 13:41:35,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:35,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:41:35,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264639370] [2020-10-29 13:41:35,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:35,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:35,013 INFO L87 Difference]: Start difference. First operand 734 states and 1078 transitions. Second operand 6 states. [2020-10-29 13:41:35,234 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:41:36,013 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:41:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:36,263 INFO L93 Difference]: Finished difference Result 1809 states and 2713 transitions. [2020-10-29 13:41:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:41:36,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-29 13:41:36,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:36,270 INFO L225 Difference]: With dead ends: 1809 [2020-10-29 13:41:36,270 INFO L226 Difference]: Without dead ends: 1188 [2020-10-29 13:41:36,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:41:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-29 13:41:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1185. [2020-10-29 13:41:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-10-29 13:41:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1754 transitions. [2020-10-29 13:41:36,417 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1754 transitions. Word has length 62 [2020-10-29 13:41:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1754 transitions. [2020-10-29 13:41:36,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1754 transitions. [2020-10-29 13:41:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 13:41:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:36,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:36,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:41:36,419 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash -844480070, now seen corresponding path program 1 times [2020-10-29 13:41:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432653744] [2020-10-29 13:41:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:38,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:41,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:41,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 13:41:41,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:41:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:41,794 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:41,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:41,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:41,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:41,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:41:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:41,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:41,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432653744] [2020-10-29 13:41:41,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:41,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:41:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913685679] [2020-10-29 13:41:41,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:41:41,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:41:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:41,830 INFO L87 Difference]: Start difference. First operand 1185 states and 1754 transitions. Second operand 9 states. [2020-10-29 13:41:42,075 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:41:44,146 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:41:44,738 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:41:45,834 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:46,179 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:47,343 INFO L93 Difference]: Finished difference Result 15525 states and 23015 transitions. [2020-10-29 13:41:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:41:47,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-29 13:41:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:47,413 INFO L225 Difference]: With dead ends: 15525 [2020-10-29 13:41:47,413 INFO L226 Difference]: Without dead ends: 14525 [2020-10-29 13:41:47,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:41:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14525 states. [2020-10-29 13:41:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14525 to 1174. [2020-10-29 13:41:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2020-10-29 13:41:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1689 transitions. [2020-10-29 13:41:47,749 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1689 transitions. Word has length 62 [2020-10-29 13:41:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:47,749 INFO L481 AbstractCegarLoop]: Abstraction has 1174 states and 1689 transitions. [2020-10-29 13:41:47,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:41:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1689 transitions. [2020-10-29 13:41:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 13:41:47,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:47,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:47,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:41:47,752 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1937816405, now seen corresponding path program 1 times [2020-10-29 13:41:47,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546150317] [2020-10-29 13:41:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:47,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:47,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:47,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:48,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:48,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:48,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:52,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 13:41:52,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:41:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:41:52,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:52,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:41:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:41:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:52,981 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 23 [2020-10-29 13:41:53,182 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:53,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:53,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:53,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546150317] [2020-10-29 13:41:53,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:53,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:41:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057265555] [2020-10-29 13:41:53,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:41:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:41:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:53,220 INFO L87 Difference]: Start difference. First operand 1174 states and 1689 transitions. Second operand 9 states. [2020-10-29 13:41:53,429 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:41:55,038 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:41:55,656 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:41:56,603 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:41:56,946 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:58,495 INFO L93 Difference]: Finished difference Result 12646 states and 18326 transitions. [2020-10-29 13:41:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:41:58,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-29 13:41:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:58,525 INFO L225 Difference]: With dead ends: 12646 [2020-10-29 13:41:58,525 INFO L226 Difference]: Without dead ends: 11694 [2020-10-29 13:41:58,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:41:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2020-10-29 13:41:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 1176. [2020-10-29 13:41:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2020-10-29 13:41:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1691 transitions. [2020-10-29 13:41:58,920 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1691 transitions. Word has length 63 [2020-10-29 13:41:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:58,921 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 1691 transitions. [2020-10-29 13:41:58,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:41:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1691 transitions. [2020-10-29 13:41:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:41:58,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:58,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:41:58,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:41:58,924 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -418751805, now seen corresponding path program 1 times [2020-10-29 13:41:58,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:58,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251744286] [2020-10-29 13:41:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:02,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:02,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:42:02,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:42:02,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:03,240 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:03,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:03,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:03,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:03,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:03,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251744286] [2020-10-29 13:42:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:03,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:42:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448490938] [2020-10-29 13:42:03,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:42:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:03,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:42:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:03,273 INFO L87 Difference]: Start difference. First operand 1176 states and 1691 transitions. Second operand 10 states. [2020-10-29 13:42:03,516 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:42:05,746 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 149 [2020-10-29 13:42:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:06,998 INFO L93 Difference]: Finished difference Result 4537 states and 6684 transitions. [2020-10-29 13:42:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:42:06,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-29 13:42:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:07,008 INFO L225 Difference]: With dead ends: 4537 [2020-10-29 13:42:07,009 INFO L226 Difference]: Without dead ends: 3469 [2020-10-29 13:42:07,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:42:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2020-10-29 13:42:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1841. [2020-10-29 13:42:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1841 states. [2020-10-29 13:42:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2671 transitions. [2020-10-29 13:42:07,520 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2671 transitions. Word has length 64 [2020-10-29 13:42:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:07,520 INFO L481 AbstractCegarLoop]: Abstraction has 1841 states and 2671 transitions. [2020-10-29 13:42:07,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:42:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2671 transitions. [2020-10-29 13:42:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:42:07,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:07,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:07,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:42:07,523 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1498926714, now seen corresponding path program 1 times [2020-10-29 13:42:07,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:07,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474653650] [2020-10-29 13:42:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:07,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:08,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:09,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:09,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:12,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:42:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:12,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:42:12,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:12,740 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 22 [2020-10-29 13:42:12,961 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:12,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474653650] [2020-10-29 13:42:12,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:12,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:42:12,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638748969] [2020-10-29 13:42:12,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:42:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:42:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:12,990 INFO L87 Difference]: Start difference. First operand 1841 states and 2671 transitions. Second operand 9 states. [2020-10-29 13:42:13,216 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:42:15,073 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:42:15,675 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:42:17,097 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:42:17,704 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:42:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:22,311 INFO L93 Difference]: Finished difference Result 23553 states and 34118 transitions. [2020-10-29 13:42:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:42:22,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-29 13:42:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:22,366 INFO L225 Difference]: With dead ends: 23553 [2020-10-29 13:42:22,366 INFO L226 Difference]: Without dead ends: 21945 [2020-10-29 13:42:22,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:42:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21945 states. [2020-10-29 13:42:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21945 to 1843. [2020-10-29 13:42:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-10-29 13:42:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2673 transitions. [2020-10-29 13:42:23,053 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2673 transitions. Word has length 64 [2020-10-29 13:42:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:23,053 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2673 transitions. [2020-10-29 13:42:23,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:42:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2673 transitions. [2020-10-29 13:42:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 13:42:23,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:23,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:23,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:42:23,056 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1517095009, now seen corresponding path program 1 times [2020-10-29 13:42:23,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:23,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729156105] [2020-10-29 13:42:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:23,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:26,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:26,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 13:42:26,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-29 13:42:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:26,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:42:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:42:26,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:26,784 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:26,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:26,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729156105] [2020-10-29 13:42:26,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:26,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:42:26,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087299307] [2020-10-29 13:42:26,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:42:26,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:42:26,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:26,819 INFO L87 Difference]: Start difference. First operand 1843 states and 2673 transitions. Second operand 10 states. [2020-10-29 13:42:27,089 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:42:27,592 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-29 13:42:27,717 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-29 13:42:27,877 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-29 13:42:29,778 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 151 [2020-10-29 13:42:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:31,011 INFO L93 Difference]: Finished difference Result 6360 states and 9378 transitions. [2020-10-29 13:42:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:42:31,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-29 13:42:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:31,020 INFO L225 Difference]: With dead ends: 6360 [2020-10-29 13:42:31,021 INFO L226 Difference]: Without dead ends: 4628 [2020-10-29 13:42:31,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:42:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2020-10-29 13:42:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 2448. [2020-10-29 13:42:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2020-10-29 13:42:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3573 transitions. [2020-10-29 13:42:31,921 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3573 transitions. Word has length 64 [2020-10-29 13:42:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:31,921 INFO L481 AbstractCegarLoop]: Abstraction has 2448 states and 3573 transitions. [2020-10-29 13:42:31,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:42:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3573 transitions. [2020-10-29 13:42:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:42:31,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:31,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:31,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:42:31,925 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2006171991, now seen corresponding path program 1 times [2020-10-29 13:42:31,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:31,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669879713] [2020-10-29 13:42:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:32,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:32,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:32,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:42:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,473 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:33,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:33,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:33,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:33,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:33,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:33,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669879713] [2020-10-29 13:42:33,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:33,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:42:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292250218] [2020-10-29 13:42:33,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:33,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:33,510 INFO L87 Difference]: Start difference. First operand 2448 states and 3573 transitions. Second operand 6 states. [2020-10-29 13:42:34,930 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:42:35,156 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:42:35,445 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:42:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:36,313 INFO L93 Difference]: Finished difference Result 6677 states and 9845 transitions. [2020-10-29 13:42:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:42:36,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:42:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:36,325 INFO L225 Difference]: With dead ends: 6677 [2020-10-29 13:42:36,325 INFO L226 Difference]: Without dead ends: 4479 [2020-10-29 13:42:36,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2020-10-29 13:42:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 3368. [2020-10-29 13:42:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3368 states. [2020-10-29 13:42:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 4881 transitions. [2020-10-29 13:42:37,568 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 4881 transitions. Word has length 72 [2020-10-29 13:42:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:37,568 INFO L481 AbstractCegarLoop]: Abstraction has 3368 states and 4881 transitions. [2020-10-29 13:42:37,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 4881 transitions. [2020-10-29 13:42:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:42:37,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:37,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:37,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:42:37,572 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -895270095, now seen corresponding path program 1 times [2020-10-29 13:42:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:37,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509729362] [2020-10-29 13:42:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:39,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2007 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:42:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:39,830 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:39,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:39,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509729362] [2020-10-29 13:42:39,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:39,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:42:39,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102955000] [2020-10-29 13:42:39,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:39,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:39,859 INFO L87 Difference]: Start difference. First operand 3368 states and 4881 transitions. Second operand 6 states. [2020-10-29 13:42:41,599 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:42:41,875 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:42:42,090 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:42:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:43,040 INFO L93 Difference]: Finished difference Result 5468 states and 7900 transitions. [2020-10-29 13:42:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:42:43,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:42:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:43,047 INFO L225 Difference]: With dead ends: 5468 [2020-10-29 13:42:43,047 INFO L226 Difference]: Without dead ends: 4380 [2020-10-29 13:42:43,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2020-10-29 13:42:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 3540. [2020-10-29 13:42:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2020-10-29 13:42:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 5027 transitions. [2020-10-29 13:42:44,184 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 5027 transitions. Word has length 73 [2020-10-29 13:42:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 3540 states and 5027 transitions. [2020-10-29 13:42:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 5027 transitions. [2020-10-29 13:42:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:42:44,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:44,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:44,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:42:44,187 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:44,188 INFO L82 PathProgramCache]: Analyzing trace with hash -35846304, now seen corresponding path program 1 times [2020-10-29 13:42:44,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:44,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909618234] [2020-10-29 13:42:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:44,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:45,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 13:42:45,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:45,385 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:45,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:45,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:45,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909618234] [2020-10-29 13:42:45,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:45,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:45,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569468598] [2020-10-29 13:42:45,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:45,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:45,425 INFO L87 Difference]: Start difference. First operand 3540 states and 5027 transitions. Second operand 6 states. [2020-10-29 13:42:45,674 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:42:47,231 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:42:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:48,642 INFO L93 Difference]: Finished difference Result 9618 states and 13900 transitions. [2020-10-29 13:42:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:48,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:42:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:48,649 INFO L225 Difference]: With dead ends: 9618 [2020-10-29 13:42:48,649 INFO L226 Difference]: Without dead ends: 6398 [2020-10-29 13:42:48,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6398 states. [2020-10-29 13:42:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6398 to 6395. [2020-10-29 13:42:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-29 13:42:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 9170 transitions. [2020-10-29 13:42:50,932 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 9170 transitions. Word has length 73 [2020-10-29 13:42:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:50,932 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 9170 transitions. [2020-10-29 13:42:50,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 9170 transitions. [2020-10-29 13:42:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:42:50,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:50,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:50,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:42:50,939 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1781448011, now seen corresponding path program 1 times [2020-10-29 13:42:50,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:50,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172825861] [2020-10-29 13:42:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:50,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:52,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 13:42:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:53,092 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:53,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:53,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:53,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:53,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:53,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:53,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172825861] [2020-10-29 13:42:53,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:53,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:53,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525212141] [2020-10-29 13:42:53,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:53,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:53,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:53,128 INFO L87 Difference]: Start difference. First operand 6395 states and 9170 transitions. Second operand 6 states. [2020-10-29 13:42:53,376 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:42:55,116 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:42:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:57,584 INFO L93 Difference]: Finished difference Result 14827 states and 21459 transitions. [2020-10-29 13:42:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:57,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-29 13:42:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:57,598 INFO L225 Difference]: With dead ends: 14827 [2020-10-29 13:42:57,598 INFO L226 Difference]: Without dead ends: 10159 [2020-10-29 13:42:57,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10159 states. [2020-10-29 13:43:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10159 to 10156. [2020-10-29 13:43:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10156 states. [2020-10-29 13:43:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10156 states to 10156 states and 14612 transitions. [2020-10-29 13:43:01,249 INFO L78 Accepts]: Start accepts. Automaton has 10156 states and 14612 transitions. Word has length 74 [2020-10-29 13:43:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:01,249 INFO L481 AbstractCegarLoop]: Abstraction has 10156 states and 14612 transitions. [2020-10-29 13:43:01,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:43:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10156 states and 14612 transitions. [2020-10-29 13:43:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:43:01,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:01,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:01,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:43:01,259 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1338916844, now seen corresponding path program 1 times [2020-10-29 13:43:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:01,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303978671] [2020-10-29 13:43:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:01,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:02,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:04,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:43:04,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:43:04,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:43:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:04,612 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:43:04,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:04,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:04,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:04,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303978671] [2020-10-29 13:43:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:43:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723299389] [2020-10-29 13:43:04,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:43:04,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:43:04,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:04,638 INFO L87 Difference]: Start difference. First operand 10156 states and 14612 transitions. Second operand 9 states. [2020-10-29 13:43:04,902 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:43:07,865 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:43:08,147 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:43:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:13,571 INFO L93 Difference]: Finished difference Result 22136 states and 31817 transitions. [2020-10-29 13:43:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:43:13,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:43:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:13,592 INFO L225 Difference]: With dead ends: 22136 [2020-10-29 13:43:13,592 INFO L226 Difference]: Without dead ends: 19464 [2020-10-29 13:43:13,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:43:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19464 states. [2020-10-29 13:43:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19464 to 10143. [2020-10-29 13:43:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10143 states. [2020-10-29 13:43:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 14594 transitions. [2020-10-29 13:43:17,200 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 14594 transitions. Word has length 74 [2020-10-29 13:43:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:17,200 INFO L481 AbstractCegarLoop]: Abstraction has 10143 states and 14594 transitions. [2020-10-29 13:43:17,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:43:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 14594 transitions. [2020-10-29 13:43:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:43:17,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:17,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:17,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:43:17,206 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1496993908, now seen corresponding path program 1 times [2020-10-29 13:43:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:17,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897122602] [2020-10-29 13:43:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:17,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:20,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:20,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:43:20,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:43:20,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2966 [2020-10-29 13:43:20,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:20,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:43:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:20,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:43:20,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:20,577 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:43:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:20,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897122602] [2020-10-29 13:43:20,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:20,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:43:20,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806556927] [2020-10-29 13:43:20,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:43:20,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:20,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:43:20,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:20,608 INFO L87 Difference]: Start difference. First operand 10143 states and 14594 transitions. Second operand 9 states. [2020-10-29 13:43:20,928 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:43:24,799 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:43:25,185 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:43:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:33,138 INFO L93 Difference]: Finished difference Result 36399 states and 52286 transitions. [2020-10-29 13:43:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:43:33,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-29 13:43:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:33,171 INFO L225 Difference]: With dead ends: 36399 [2020-10-29 13:43:33,171 INFO L226 Difference]: Without dead ends: 27215 [2020-10-29 13:43:33,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:43:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27215 states. [2020-10-29 13:43:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27215 to 9344. [2020-10-29 13:43:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9344 states. [2020-10-29 13:43:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9344 states to 9344 states and 13403 transitions. [2020-10-29 13:43:36,577 INFO L78 Accepts]: Start accepts. Automaton has 9344 states and 13403 transitions. Word has length 74 [2020-10-29 13:43:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:36,577 INFO L481 AbstractCegarLoop]: Abstraction has 9344 states and 13403 transitions. [2020-10-29 13:43:36,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:43:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 9344 states and 13403 transitions. [2020-10-29 13:43:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:43:36,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:36,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:36,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:43:36,581 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1449961062, now seen corresponding path program 1 times [2020-10-29 13:43:36,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317090947] [2020-10-29 13:43:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:41,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:43:41,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:43:41,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:43:41,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:41,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:41,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:43:41,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:41,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:43:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:41,794 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-29 13:43:42,017 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:43:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:42,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:42,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:42,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:43:42,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:42,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:42,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317090947] [2020-10-29 13:43:42,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:42,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:43:42,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846802081] [2020-10-29 13:43:42,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:43:42,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:43:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:42,056 INFO L87 Difference]: Start difference. First operand 9344 states and 13403 transitions. Second operand 9 states. [2020-10-29 13:43:42,313 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 13:43:46,000 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:43:46,300 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:43:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:51,701 INFO L93 Difference]: Finished difference Result 21401 states and 30713 transitions. [2020-10-29 13:43:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:43:51,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-29 13:43:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:51,721 INFO L225 Difference]: With dead ends: 21401 [2020-10-29 13:43:51,721 INFO L226 Difference]: Without dead ends: 18389 [2020-10-29 13:43:51,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:43:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18389 states. [2020-10-29 13:43:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18389 to 9301. [2020-10-29 13:43:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9301 states. [2020-10-29 13:43:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 13342 transitions. [2020-10-29 13:43:55,140 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 13342 transitions. Word has length 75 [2020-10-29 13:43:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:55,140 INFO L481 AbstractCegarLoop]: Abstraction has 9301 states and 13342 transitions. [2020-10-29 13:43:55,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:43:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 13342 transitions. [2020-10-29 13:43:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:43:55,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:55,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:55,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 13:43:55,145 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1422021410, now seen corresponding path program 1 times [2020-10-29 13:43:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:55,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103570616] [2020-10-29 13:43:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:55,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:55,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:57,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:43:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:43:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:43:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:57,609 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:43:57,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:57,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:57,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:57,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103570616] [2020-10-29 13:43:57,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:57,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-29 13:43:57,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461181069] [2020-10-29 13:43:57,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 13:43:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 13:43:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:43:57,646 INFO L87 Difference]: Start difference. First operand 9301 states and 13342 transitions. Second operand 11 states. [2020-10-29 13:43:57,894 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 13:44:01,801 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 13:44:02,105 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 13:44:02,781 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:44:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:11,920 INFO L93 Difference]: Finished difference Result 36485 states and 52590 transitions. [2020-10-29 13:44:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 13:44:11,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-29 13:44:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:11,953 INFO L225 Difference]: With dead ends: 36485 [2020-10-29 13:44:11,954 INFO L226 Difference]: Without dead ends: 29808 [2020-10-29 13:44:11,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-29 13:44:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29808 states. [2020-10-29 13:44:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29808 to 11613. [2020-10-29 13:44:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11613 states. [2020-10-29 13:44:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11613 states to 11613 states and 16712 transitions. [2020-10-29 13:44:16,201 INFO L78 Accepts]: Start accepts. Automaton has 11613 states and 16712 transitions. Word has length 75 [2020-10-29 13:44:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:16,201 INFO L481 AbstractCegarLoop]: Abstraction has 11613 states and 16712 transitions. [2020-10-29 13:44:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 13:44:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11613 states and 16712 transitions. [2020-10-29 13:44:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:44:16,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:16,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:16,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 13:44:16,205 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1661637810, now seen corresponding path program 1 times [2020-10-29 13:44:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:16,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977213544] [2020-10-29 13:44:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:16,786 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:44:16,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:16,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:16,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977213544] [2020-10-29 13:44:16,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:16,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726873742] [2020-10-29 13:44:16,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:16,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:16,812 INFO L87 Difference]: Start difference. First operand 11613 states and 16712 transitions. Second operand 4 states. [2020-10-29 13:44:17,090 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 141