/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=0.2 --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 -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:43:39,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:43:39,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:43:39,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:43:39,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:43:39,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:43:39,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:43:39,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:43:39,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:43:39,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:43:39,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:43:39,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:43:39,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:43:39,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:43:39,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:43:39,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:43:39,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:43:39,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:43:39,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:43:39,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:43:39,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:43:39,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:43:39,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:43:39,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:43:39,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:43:39,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:43:39,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:43:39,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:43:39,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:43:39,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:43:39,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:43:39,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:43:39,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:43:39,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:43:39,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:43:39,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:43:39,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:43:39,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:43:39,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:43:39,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:43:39,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:43:39,654 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 [2020-10-14 17:43:39,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:43:39,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:43:39,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:43:39,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:43:39,697 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:43:39,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:43:39,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:43:39,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:43:39,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:43:39,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:43:39,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:43:39,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:43:39,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:43:39,700 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:43:39,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:43:39,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:43:39,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:43:39,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:43:39,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:43:39,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:43:39,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:43:39,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:39,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:43:39,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:43:39,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:43:39,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:43:39,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:43:39,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:43:39,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:43:39,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:43:40,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:43:40,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:43:40,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:43:40,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:43:40,053 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:43:40,053 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-14 17:43:40,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee609edf9/e41d1be465b244eb84f734896a78a592/FLAGd5ed97493 [2020-10-14 17:43:40,614 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:43:40,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-14 17:43:40,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee609edf9/e41d1be465b244eb84f734896a78a592/FLAGd5ed97493 [2020-10-14 17:43:41,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee609edf9/e41d1be465b244eb84f734896a78a592 [2020-10-14 17:43:41,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:43:41,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:43:41,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:41,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:43:41,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:43:41,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180b14af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41, skipping insertion in model container [2020-10-14 17:43:41,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:43:41,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:43:41,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:41,337 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:43:41,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:41,374 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:43:41,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41 WrapperNode [2020-10-14 17:43:41,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:41,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:43:41,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:43:41,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:43:41,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... [2020-10-14 17:43:41,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:43:41,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:43:41,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:43:41,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:43:41,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:41,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:43:41,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:43:41,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:43:41,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:43:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:43:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:43:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:43:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:43:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:43:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-14 17:43:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 17:43:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:43:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 17:43:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:43:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:43:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:43:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:43:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:43:42,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:43:42,034 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-14 17:43:42,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:42 BoogieIcfgContainer [2020-10-14 17:43:42,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:43:42,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:43:42,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:43:42,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:43:42,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:43:41" (1/3) ... [2020-10-14 17:43:42,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa8dbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:42, skipping insertion in model container [2020-10-14 17:43:42,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:41" (2/3) ... [2020-10-14 17:43:42,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa8dbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:42, skipping insertion in model container [2020-10-14 17:43:42,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:42" (3/3) ... [2020-10-14 17:43:42,047 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2020-10-14 17:43:42,058 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:43:42,065 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:43:42,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:43:42,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:43:42,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:43:42,101 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:43:42,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:43:42,102 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:43:42,102 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:43:42,102 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:43:42,102 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:43:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-14 17:43:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:43:42,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:42,127 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] [2020-10-14 17:43:42,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -449577023, now seen corresponding path program 1 times [2020-10-14 17:43:42,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:42,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783884802] [2020-10-14 17:43:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:43,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:45,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:45,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:43:45,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:43:45,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3510 [2020-10-14 17:43:45,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:45,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:43:45,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:45,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:43:45,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 17:43:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:45,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:45,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:45,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:43:45,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:45,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:43:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:45,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783884802] [2020-10-14 17:43:45,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:43:45,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:43:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121081239] [2020-10-14 17:43:45,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:43:45,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:43:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:43:46,018 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 6 states. [2020-10-14 17:43:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:46,449 INFO L93 Difference]: Finished difference Result 120 states and 186 transitions. [2020-10-14 17:43:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:43:46,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-14 17:43:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:46,462 INFO L225 Difference]: With dead ends: 120 [2020-10-14 17:43:46,462 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 17:43:46,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:43:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 17:43:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 17:43:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 17:43:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2020-10-14 17:43:46,516 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2020-10-14 17:43:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:46,517 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2020-10-14 17:43:46,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:43:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2020-10-14 17:43:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:43:46,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:46,519 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] [2020-10-14 17:43:46,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:43:46,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash -80080895, now seen corresponding path program 1 times [2020-10-14 17:43:46,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:46,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511668662] [2020-10-14 17:43:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:51,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:43:51,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 17:43:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 17:43:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:51,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:43:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:43:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:51,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:51,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:51,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:43:51,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:51,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:43:51,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511668662] [2020-10-14 17:43:51,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:43:51,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:43:51,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125347544] [2020-10-14 17:43:51,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:43:51,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:51,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:43:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:43:51,640 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 5 states. [2020-10-14 17:43:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:51,924 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2020-10-14 17:43:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:43:51,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-14 17:43:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:51,927 INFO L225 Difference]: With dead ends: 120 [2020-10-14 17:43:51,927 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 17:43:51,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:43:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 17:43:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-14 17:43:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:43:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-14 17:43:51,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2020-10-14 17:43:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:51,942 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-14 17:43:51,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:43:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-14 17:43:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:43:51,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:51,944 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] [2020-10-14 17:43:51,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:43:51,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 253867821, now seen corresponding path program 1 times [2020-10-14 17:43:51,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:51,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016555830] [2020-10-14 17:43:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:51,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:56,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:43:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:43:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:43:56,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:56,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:43:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:43:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:57,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:57,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:57,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:57,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:57,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 17:43:57,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:57,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:43:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 17:43:57,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016555830] [2020-10-14 17:43:57,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:57,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:43:57,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973403688] [2020-10-14 17:43:57,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:43:57,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:43:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:43:57,097 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-10-14 17:43:57,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:57,443 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2020-10-14 17:43:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:43:57,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-14 17:43:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:57,445 INFO L225 Difference]: With dead ends: 122 [2020-10-14 17:43:57,445 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 17:43:57,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:43:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 17:43:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 17:43:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 17:43:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-14 17:43:57,460 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 54 [2020-10-14 17:43:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:57,460 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-14 17:43:57,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:43:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-14 17:43:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 17:43:57,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:57,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:57,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:43:57,467 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1195572919, now seen corresponding path program 2 times [2020-10-14 17:43:57,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:57,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192960055] [2020-10-14 17:43:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:57,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:59,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:02,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 17:44:02,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5308 [2020-10-14 17:44:02,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:02,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 17:44:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 17:44:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:03,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:03,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:03,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:03,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:03,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:03,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:03,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:03,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:44:03,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192960055] [2020-10-14 17:44:03,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:03,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:44:03,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170824732] [2020-10-14 17:44:03,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:44:03,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:03,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:44:03,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:44:03,895 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 16 states. [2020-10-14 17:44:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:04,915 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2020-10-14 17:44:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:04,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-14 17:44:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:04,918 INFO L225 Difference]: With dead ends: 138 [2020-10-14 17:44:04,918 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 17:44:04,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:44:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 17:44:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2020-10-14 17:44:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 17:44:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2020-10-14 17:44:04,936 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2020-10-14 17:44:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:04,936 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2020-10-14 17:44:04,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:44:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2020-10-14 17:44:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:44:04,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:04,939 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:04,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:44:04,940 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1341042069, now seen corresponding path program 3 times [2020-10-14 17:44:04,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:04,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578724410] [2020-10-14 17:44:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:09,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:44:09,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:44:09,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:09,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 17:44:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:44:09,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:10,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:10,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:10,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:10,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:10,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:10,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:10,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:44:10,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578724410] [2020-10-14 17:44:10,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:10,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:10,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049531100] [2020-10-14 17:44:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:10,121 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 10 states. [2020-10-14 17:44:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:11,034 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2020-10-14 17:44:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:44:11,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-14 17:44:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:11,036 INFO L225 Difference]: With dead ends: 265 [2020-10-14 17:44:11,036 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 17:44:11,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:44:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 17:44:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-10-14 17:44:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 17:44:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2020-10-14 17:44:11,070 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 78 [2020-10-14 17:44:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:11,070 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2020-10-14 17:44:11,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2020-10-14 17:44:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:44:11,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:11,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:11,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:44:11,081 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1092318379, now seen corresponding path program 4 times [2020-10-14 17:44:11,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:11,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111145165] [2020-10-14 17:44:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:16,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:16,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:44:16,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:44:16,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:16,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:44:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:44:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:16,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:16,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:16,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:16,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:16,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:16,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:16,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:16,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:16,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:16,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:16,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:44:16,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111145165] [2020-10-14 17:44:16,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:16,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:16,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137004169] [2020-10-14 17:44:16,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:16,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:16,260 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand 10 states. [2020-10-14 17:44:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:16,834 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2020-10-14 17:44:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:44:16,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-14 17:44:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:16,837 INFO L225 Difference]: With dead ends: 249 [2020-10-14 17:44:16,837 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 17:44:16,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 17:44:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-14 17:44:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 17:44:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-14 17:44:16,852 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 78 [2020-10-14 17:44:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:16,852 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-14 17:44:16,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-14 17:44:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 17:44:16,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:16,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:16,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:44:16,857 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1668276929, now seen corresponding path program 5 times [2020-10-14 17:44:16,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:16,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525053713] [2020-10-14 17:44:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:22,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 17:44:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:44:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-14 17:44:22,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:22,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 17:44:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 17:44:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:23,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:23,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:23,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:44:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:23,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:44:23,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525053713] [2020-10-14 17:44:23,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:23,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:44:23,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605195234] [2020-10-14 17:44:23,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:44:23,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:23,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:44:23,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:44:23,910 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 23 states. [2020-10-14 17:44:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:25,206 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-10-14 17:44:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:44:25,207 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-10-14 17:44:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:25,211 INFO L225 Difference]: With dead ends: 178 [2020-10-14 17:44:25,211 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 17:44:25,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 26 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:44:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 17:44:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-10-14 17:44:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-14 17:44:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2020-10-14 17:44:25,242 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2020-10-14 17:44:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:25,243 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2020-10-14 17:44:25,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:44:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2020-10-14 17:44:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:44:25,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:25,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:25,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:44:25,250 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:25,251 INFO L82 PathProgramCache]: Analyzing trace with hash 119858975, now seen corresponding path program 6 times [2020-10-14 17:44:25,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:25,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209221305] [2020-10-14 17:44:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:25,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:30,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:44:30,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:44:30,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:30,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:44:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:44:30,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:30,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:30,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:30,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:30,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:44:30,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209221305] [2020-10-14 17:44:30,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:30,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:30,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684964979] [2020-10-14 17:44:30,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:30,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:30,410 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand 12 states. [2020-10-14 17:44:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:31,603 INFO L93 Difference]: Finished difference Result 339 states and 385 transitions. [2020-10-14 17:44:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:44:31,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-10-14 17:44:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:31,613 INFO L225 Difference]: With dead ends: 339 [2020-10-14 17:44:31,614 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 17:44:31,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:44:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 17:44:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2020-10-14 17:44:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-14 17:44:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2020-10-14 17:44:31,637 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 100 [2020-10-14 17:44:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:31,637 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2020-10-14 17:44:31,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2020-10-14 17:44:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:44:31,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:31,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:31,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:44:31,639 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2090298145, now seen corresponding path program 7 times [2020-10-14 17:44:31,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:31,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124692027] [2020-10-14 17:44:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:31,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:44:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:36,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:36,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:36,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:36,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:36,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:36,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:36,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:36,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:36,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 17:44:36,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124692027] [2020-10-14 17:44:36,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:36,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:36,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359473128] [2020-10-14 17:44:36,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:36,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:36,810 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand 12 states. [2020-10-14 17:44:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:37,645 INFO L93 Difference]: Finished difference Result 309 states and 338 transitions. [2020-10-14 17:44:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:44:37,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-10-14 17:44:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:37,646 INFO L225 Difference]: With dead ends: 309 [2020-10-14 17:44:37,647 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 17:44:37,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 17:44:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2020-10-14 17:44:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 17:44:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-14 17:44:37,670 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 100 [2020-10-14 17:44:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:37,671 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-14 17:44:37,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-14 17:44:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 17:44:37,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:37,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:37,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:44:37,676 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:37,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1988100939, now seen corresponding path program 8 times [2020-10-14 17:44:37,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:37,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816360100] [2020-10-14 17:44:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:37,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:43,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 17:44:43,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:44:43,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5359 [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-14 17:44:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:44,661 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-14 17:44:46,031 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-14 17:44:46,209 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-10-14 17:44:47,472 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-14 17:44:47,707 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-14 17:44:47,945 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-14 17:44:48,595 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-14 17:44:48,811 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-14 17:44:49,331 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-14 17:44:49,580 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-14 17:44:49,853 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-14 17:44:50,081 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-14 17:44:50,297 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-14 17:44:50,531 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-14 17:44:51,162 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-14 17:44:51,360 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-14 17:44:51,739 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-14 17:44:52,054 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-14 17:44:52,321 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-14 17:44:52,580 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-14 17:44:52,803 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-14 17:44:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:55,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:56,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816360100] [2020-10-14 17:44:56,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:56,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-14 17:44:56,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125701926] [2020-10-14 17:44:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-14 17:44:56,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-14 17:44:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=5411, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 17:44:56,034 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 77 states. [2020-10-14 17:44:58,056 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 17:44:58,647 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-14 17:44:59,168 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-14 17:44:59,515 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-14 17:45:00,091 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-14 17:45:01,887 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-14 17:45:02,528 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-14 17:45:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:09,781 INFO L93 Difference]: Finished difference Result 279 states and 304 transitions. [2020-10-14 17:45:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 17:45:09,783 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 120 [2020-10-14 17:45:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:09,787 INFO L225 Difference]: With dead ends: 279 [2020-10-14 17:45:09,787 INFO L226 Difference]: Without dead ends: 263 [2020-10-14 17:45:09,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 16 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1063, Invalid=11819, Unknown=0, NotChecked=0, Total=12882 [2020-10-14 17:45:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-14 17:45:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 206. [2020-10-14 17:45:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-14 17:45:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2020-10-14 17:45:09,831 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 120 [2020-10-14 17:45:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:09,832 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2020-10-14 17:45:09,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-14 17:45:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2020-10-14 17:45:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 17:45:09,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:09,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:09,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:45:09,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1454031575, now seen corresponding path program 9 times [2020-10-14 17:45:09,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:09,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475912069] [2020-10-14 17:45:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:09,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:09,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:10,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:14,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 17:45:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:45:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:15,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:15,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:15,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:15,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:15,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:15,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:45:15,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:15,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:15,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:15,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:15,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:45:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:45:15,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475912069] [2020-10-14 17:45:15,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:15,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:15,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586268404] [2020-10-14 17:45:15,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:15,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:15,044 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand 14 states. [2020-10-14 17:45:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:16,957 INFO L93 Difference]: Finished difference Result 429 states and 478 transitions. [2020-10-14 17:45:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:45:16,958 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 122 [2020-10-14 17:45:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:16,963 INFO L225 Difference]: With dead ends: 429 [2020-10-14 17:45:16,963 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 17:45:16,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:45:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 17:45:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 214. [2020-10-14 17:45:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 17:45:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 232 transitions. [2020-10-14 17:45:16,987 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 232 transitions. Word has length 122 [2020-10-14 17:45:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:16,987 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 232 transitions. [2020-10-14 17:45:16,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 232 transitions. [2020-10-14 17:45:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 17:45:16,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:16,989 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:16,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:45:16,990 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash 206746439, now seen corresponding path program 10 times [2020-10-14 17:45:16,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:16,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519330670] [2020-10-14 17:45:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:22,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 17:45:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 17:45:22,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:22,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:22,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-14 17:45:22,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519330670] [2020-10-14 17:45:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:22,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501231781] [2020-10-14 17:45:22,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:22,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:22,175 INFO L87 Difference]: Start difference. First operand 214 states and 232 transitions. Second operand 14 states. [2020-10-14 17:45:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:23,211 INFO L93 Difference]: Finished difference Result 359 states and 387 transitions. [2020-10-14 17:45:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:45:23,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2020-10-14 17:45:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:23,214 INFO L225 Difference]: With dead ends: 359 [2020-10-14 17:45:23,214 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:45:23,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:45:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:45:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2020-10-14 17:45:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 17:45:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2020-10-14 17:45:23,230 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 124 [2020-10-14 17:45:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:23,231 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2020-10-14 17:45:23,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2020-10-14 17:45:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 17:45:23,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:23,233 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:23,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:45:23,233 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1580007339, now seen corresponding path program 11 times [2020-10-14 17:45:23,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:23,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233775984] [2020-10-14 17:45:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:23,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 17:45:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:45:30,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7141 [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 108 [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-14 17:45:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:35,148 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-14 17:45:36,788 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-14 17:45:37,040 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-14 17:45:39,076 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-14 17:45:39,328 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-14 17:45:39,651 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-14 17:45:42,655 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-14 17:45:42,937 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-14 17:45:44,914 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-10-14 17:45:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 17:45:49,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233775984] [2020-10-14 17:45:49,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:49,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-14 17:45:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435922789] [2020-10-14 17:45:49,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-14 17:45:49,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-14 17:45:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=7275, Unknown=0, NotChecked=0, Total=7656 [2020-10-14 17:45:49,618 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand 88 states. [2020-10-14 17:45:51,399 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-14 17:45:53,161 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-14 17:45:53,561 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-14 17:45:54,607 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2020-10-14 17:45:56,181 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-14 17:45:57,020 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-14 17:45:57,829 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-14 17:45:59,533 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 80 [2020-10-14 17:46:00,216 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-14 17:46:00,872 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-14 17:46:01,561 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-14 17:46:02,306 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-14 17:46:03,855 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 79 [2020-10-14 17:46:04,513 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-14 17:46:05,303 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-10-14 17:46:05,767 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 17:46:06,521 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-14 17:46:07,330 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-14 17:46:08,326 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-10-14 17:46:09,220 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 46 [2020-10-14 17:46:09,634 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 21 [2020-10-14 17:46:10,206 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2020-10-14 17:46:11,146 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 86 [2020-10-14 17:46:11,770 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-14 17:46:12,500 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 68 [2020-10-14 17:46:13,287 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 79 [2020-10-14 17:46:13,970 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-14 17:46:14,916 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-14 17:46:15,450 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-14 17:46:16,039 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-14 17:46:16,909 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-14 17:46:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:28,054 INFO L93 Difference]: Finished difference Result 312 states and 351 transitions. [2020-10-14 17:46:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 17:46:28,058 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 142 [2020-10-14 17:46:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:28,061 INFO L225 Difference]: With dead ends: 312 [2020-10-14 17:46:28,061 INFO L226 Difference]: Without dead ends: 306 [2020-10-14 17:46:28,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 4 SyntacticMatches, 21 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1268, Invalid=21382, Unknown=0, NotChecked=0, Total=22650 [2020-10-14 17:46:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-14 17:46:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 284. [2020-10-14 17:46:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 17:46:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 318 transitions. [2020-10-14 17:46:28,097 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 318 transitions. Word has length 142 [2020-10-14 17:46:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:28,098 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 318 transitions. [2020-10-14 17:46:28,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-14 17:46:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 318 transitions. [2020-10-14 17:46:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 17:46:28,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:28,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:28,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:46:28,101 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1165447091, now seen corresponding path program 12 times [2020-10-14 17:46:28,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:28,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904855321] [2020-10-14 17:46:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:33,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:33,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 17:46:33,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:46:33,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:46:33,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:33,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:33,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:33,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:33,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 17:46:33,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904855321] [2020-10-14 17:46:33,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:33,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:46:33,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202852720] [2020-10-14 17:46:33,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:46:33,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:33,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:46:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:46:33,507 INFO L87 Difference]: Start difference. First operand 284 states and 318 transitions. Second operand 16 states. [2020-10-14 17:46:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:38,601 INFO L93 Difference]: Finished difference Result 603 states and 682 transitions. [2020-10-14 17:46:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:46:38,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 144 [2020-10-14 17:46:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:38,610 INFO L225 Difference]: With dead ends: 603 [2020-10-14 17:46:38,610 INFO L226 Difference]: Without dead ends: 361 [2020-10-14 17:46:38,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:46:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-14 17:46:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 284. [2020-10-14 17:46:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 17:46:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 304 transitions. [2020-10-14 17:46:38,655 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 304 transitions. Word has length 144 [2020-10-14 17:46:38,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:38,656 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 304 transitions. [2020-10-14 17:46:38,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:46:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 304 transitions. [2020-10-14 17:46:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 17:46:38,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:38,658 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:38,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:46:38,659 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1879116625, now seen corresponding path program 13 times [2020-10-14 17:46:38,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:38,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102147294] [2020-10-14 17:46:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:43,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:43,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 17:46:43,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 17:46:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:44,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:44,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:44,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:46:44,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:44,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-14 17:46:44,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102147294] [2020-10-14 17:46:44,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:44,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:46:44,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338115338] [2020-10-14 17:46:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:46:44,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:46:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:46:44,178 INFO L87 Difference]: Start difference. First operand 284 states and 304 transitions. Second operand 16 states. [2020-10-14 17:46:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:47,483 INFO L93 Difference]: Finished difference Result 429 states and 458 transitions. [2020-10-14 17:46:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:46:47,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 146 [2020-10-14 17:46:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:47,489 INFO L225 Difference]: With dead ends: 429 [2020-10-14 17:46:47,490 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 17:46:47,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:46:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 17:46:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2020-10-14 17:46:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 17:46:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2020-10-14 17:46:47,514 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2020-10-14 17:46:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:47,515 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2020-10-14 17:46:47,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:46:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2020-10-14 17:46:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-14 17:46:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:47,518 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:47,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:46:47,519 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:47,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2135980511, now seen corresponding path program 14 times [2020-10-14 17:46:47,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:47,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407408790] [2020-10-14 17:46:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:48,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:55,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:55,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-14 17:46:55,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7394 [2020-10-14 17:46:55,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:55,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:55,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 127 [2020-10-14 17:46:55,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:46:55,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-14 17:46:55,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:57,016 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-14 17:46:57,247 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-14 17:46:59,654 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 17:46:59,987 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-14 17:47:00,300 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-14 17:47:00,629 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-14 17:47:00,978 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-14 17:47:01,594 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-14 17:47:02,107 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-14 17:47:02,628 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-14 17:47:03,143 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-14 17:47:03,679 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-14 17:47:04,125 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-14 17:47:05,137 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-14 17:47:05,737 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-14 17:47:06,341 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-14 17:47:07,185 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-14 17:47:09,252 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-14 17:47:09,896 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-14 17:47:10,550 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-14 17:47:11,236 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-14 17:47:11,899 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-14 17:47:12,552 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-14 17:47:13,467 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-14 17:47:14,480 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-14 17:47:15,512 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-14 17:47:16,403 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-14 17:47:17,182 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-14 17:47:17,837 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-14 17:47:18,480 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-14 17:47:19,115 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-14 17:47:19,909 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-14 17:47:20,663 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2020-10-14 17:47:21,327 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-14 17:47:22,068 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-14 17:47:22,828 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-14 17:47:23,820 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31