/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:13:16,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:13:16,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:13:16,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:13:16,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:13:16,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:13:16,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:13:16,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:13:16,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:13:16,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:13:16,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:13:16,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:13:16,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:13:16,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:13:16,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:13:16,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:13:16,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:13:16,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:13:16,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:13:16,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:13:16,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:13:16,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:13:16,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:13:16,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:13:16,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:13:16,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:13:16,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:13:16,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:13:16,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:13:16,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:13:16,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:13:16,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:13:16,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:13:16,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:13:16,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:13:16,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:13:16,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:13:16,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:13:16,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:13:16,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:13:16,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:13:16,690 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 05:13:16,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:13:16,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:13:16,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:13:16,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:13:16,742 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:13:16,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:13:16,743 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:13:16,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:13:16,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:13:16,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:13:16,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:13:16,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:13:16,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:13:16,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:13:16,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:13:16,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:13:16,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:13:16,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:13:16,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:13:16,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:13:16,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:13:16,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:13:16,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:13:16,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:13:16,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:13:16,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:13:16,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:13:16,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:13:16,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:13:16,750 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:13:17,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:13:17,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:13:17,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:13:17,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:13:17,108 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:13:17,108 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-14 05:13:17,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d0be2143/6215225f015f4891b9c4cfea66d17a9e/FLAGc6a976650 [2020-10-14 05:13:17,702 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:13:17,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2020-10-14 05:13:17,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d0be2143/6215225f015f4891b9c4cfea66d17a9e/FLAGc6a976650 [2020-10-14 05:13:18,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d0be2143/6215225f015f4891b9c4cfea66d17a9e [2020-10-14 05:13:18,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:13:18,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:13:18,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:18,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:13:18,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:13:18,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a018b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18, skipping insertion in model container [2020-10-14 05:13:18,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:13:18,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:13:18,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:18,327 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:13:18,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:13:18,366 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:13:18,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18 WrapperNode [2020-10-14 05:13:18,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:13:18,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:13:18,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:13:18,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:13:18,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (1/1) ... [2020-10-14 05:13:18,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:13:18,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:13:18,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:13:18,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:13:18,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (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 05:13:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:13:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:13:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:13:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:13:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:13:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:13:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:13:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:13:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:13:18,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:13:18,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:13:18,774 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:13:18,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:18 BoogieIcfgContainer [2020-10-14 05:13:18,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:13:18,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:13:18,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:13:18,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:13:18,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:13:18" (1/3) ... [2020-10-14 05:13:18,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b723a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:18, skipping insertion in model container [2020-10-14 05:13:18,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:13:18" (2/3) ... [2020-10-14 05:13:18,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b723a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:18, skipping insertion in model container [2020-10-14 05:13:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:18" (3/3) ... [2020-10-14 05:13:18,796 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-10-14 05:13:18,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:13:18,814 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:13:18,827 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:13:18,849 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:13:18,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:13:18,850 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:13:18,850 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:13:18,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:13:18,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:13:18,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:13:18,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:13:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 05:13:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:13:18,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:18,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:18,874 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 05:13:18,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:18,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108381370] [2020-10-14 05:13:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:18,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:13:19,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 05:13:19,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:13:19,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:19,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:19,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,091 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 05:13:19,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108381370] [2020-10-14 05:13:19,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:19,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:13:19,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181909091] [2020-10-14 05:13:19,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:13:19,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:13:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:13:19,119 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 05:13:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:19,140 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:13:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:13:19,143 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:13:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:19,152 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:13:19,152 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:13:19,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:13:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:13:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:13:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:13:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:13:19,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:13:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:19,201 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:13:19,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:13:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:13:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:13:19,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:19,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:19,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:13:19,203 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 05:13:19,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:19,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084370831] [2020-10-14 05:13:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:13:19,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-14 05:13:19,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:13:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:19,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:19,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:19,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,497 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 05:13:19,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084370831] [2020-10-14 05:13:19,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:19,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:19,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108043972] [2020-10-14 05:13:19,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:19,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:19,503 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:13:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:19,531 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-14 05:13:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:19,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:13:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:19,535 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:13:19,535 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:13:19,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:13:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-14 05:13:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:13:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-14 05:13:19,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-14 05:13:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-14 05:13:19,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-14 05:13:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:13:19,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:19,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:19,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:13:19,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 05:13:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:19,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955370498] [2020-10-14 05:13:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:13:19,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 05:13:19,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:13:19,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:19,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:19,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955370498] [2020-10-14 05:13:19,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:19,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:13:19,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793774799] [2020-10-14 05:13:19,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:13:19,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:13:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:19,849 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-14 05:13:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:19,885 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-14 05:13:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:13:19,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 05:13:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:19,887 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:13:19,887 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:13:19,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:13:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:13:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:13:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-14 05:13:19,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-14 05:13:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:19,895 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-14 05:13:19,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:13:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-14 05:13:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:13:19,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:19,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:19,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:13:19,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1025597645, now seen corresponding path program 1 times [2020-10-14 05:13:19,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:19,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134468520] [2020-10-14 05:13:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:13:20,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 05:13:20,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:13:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:13:20,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:20,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:20,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:20,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:20,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:20,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:20,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134468520] [2020-10-14 05:13:20,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:20,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:13:20,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058212556] [2020-10-14 05:13:20,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:13:20,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:13:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:20,202 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-14 05:13:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:20,244 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-14 05:13:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:13:20,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 05:13:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:20,246 INFO L225 Difference]: With dead ends: 22 [2020-10-14 05:13:20,246 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:13:20,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:13:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-10-14 05:13:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:13:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-14 05:13:20,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-14 05:13:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:20,253 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-14 05:13:20,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:13:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-14 05:13:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:20,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:20,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:20,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:13:20,255 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2020-10-14 05:13:20,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:20,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957106858] [2020-10-14 05:13:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:20,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:20,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-14 05:13:20,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:13:20,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:20,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:20,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957106858] [2020-10-14 05:13:20,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:20,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:20,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090283315] [2020-10-14 05:13:20,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:20,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:20,637 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-14 05:13:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:20,681 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-14 05:13:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:20,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 05:13:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:20,683 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:13:20,683 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:13:20,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:13:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 05:13:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:13:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-14 05:13:20,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-14 05:13:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:20,690 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-14 05:13:20,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-14 05:13:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:20,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:20,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:20,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:13:20,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 05:13:20,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:20,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067637380] [2020-10-14 05:13:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:20,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-14 05:13:20,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:13:20,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:13:20,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:20,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:20,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:20,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067637380] [2020-10-14 05:13:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:20,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884218821] [2020-10-14 05:13:20,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:20,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:20,911 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-10-14 05:13:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:20,924 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-14 05:13:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:20,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:13:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:20,926 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:13:20,927 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:13:20,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:13:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-14 05:13:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:13:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 05:13:20,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-14 05:13:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:20,935 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 05:13:20,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 05:13:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:20,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:20,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:13:20,936 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -976494032, now seen corresponding path program 2 times [2020-10-14 05:13:20,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:20,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003905669] [2020-10-14 05:13:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:20,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-14 05:13:20,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:13:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:13:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,099 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse15 (div c_main_~y~0 2))) (let ((.cse8 (* 2 .cse15))) (let ((.cse1 (= c_main_~y~0 .cse8)) (.cse0 (* 4294967296 (div c_main_~y~0 4294967296)))) (let ((.cse14 (* .cse15 (- 2))) (.cse11 (< c_main_~y~0 .cse0)) (.cse12 (not .cse1))) (let ((.cse5 (and .cse11 .cse12)) (.cse2 (div (+ c_main_~y~0 .cse14 (- 2)) 4294967296)) (.cse3 (<= .cse0 c_main_~y~0)) (.cse4 (div (+ c_main_~y~0 .cse14) 4294967296))) (or (<= (+ c_main_~y~0 1) .cse0) (and (or .cse1 (< 0 .cse2) .cse3) (or (< 0 .cse4) .cse5)) (let ((.cse10 (* 4294967296 .cse4)) (.cse7 (or .cse1 .cse3)) (.cse13 (+ .cse2 1)) (.cse6 (+ .cse4 1)) (.cse9 (* 4294967296 .cse2))) (and (or (and (<= .cse6 0) .cse7) (and (or .cse1 (< (+ .cse8 .cse9 2) c_main_~y~0) .cse3) (or .cse5 .cse1 .cse3) (or .cse5 (< (+ .cse10 .cse8) c_main_~y~0))) (and .cse11 .cse12 (<= .cse13 0))) (or (and (<= c_main_~y~0 (+ .cse10 .cse8 4294967295)) .cse7) (and (or (< 0 .cse13) .cse1 .cse3) (or (< 0 .cse6) .cse5)) (and .cse11 .cse12 (<= c_main_~y~0 (+ .cse9 .cse8 4294967295)))))))))))) is different from false [2020-10-14 05:13:23,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:23,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:23,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:23,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003905669] [2020-10-14 05:13:23,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:23,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:23,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959166191] [2020-10-14 05:13:23,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:23,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:23,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:23,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=2, Unknown=1, NotChecked=0, Total=6 [2020-10-14 05:13:23,122 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-10-14 05:13:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:23,143 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:13:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:23,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:13:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:23,144 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:13:23,144 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:13:23,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3, Invalid=2, Unknown=1, NotChecked=0, Total=6 [2020-10-14 05:13:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:13:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:13:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:13:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-14 05:13:23,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2020-10-14 05:13:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:23,167 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-14 05:13:23,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-14 05:13:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:23,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:23,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:23,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:13:23,171 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash -919235730, now seen corresponding path program 2 times [2020-10-14 05:13:23,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:23,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382013977] [2020-10-14 05:13:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:23,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-14 05:13:23,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:23,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:13:23,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:23,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:23,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:23,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:23,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382013977] [2020-10-14 05:13:23,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:23,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:23,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049145138] [2020-10-14 05:13:23,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:23,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:23,436 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-14 05:13:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:23,520 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 05:13:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:23,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 05:13:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:23,523 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:13:23,523 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:13:23,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:13:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-14 05:13:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:13:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:13:23,538 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-14 05:13:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:23,538 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:13:23,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:13:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:23,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:23,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:23,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:13:23,540 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2020-10-14 05:13:23,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:23,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481728983] [2020-10-14 05:13:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:23,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:13:23,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:23,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:23,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:23,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:23,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:23,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481728983] [2020-10-14 05:13:23,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:23,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:13:23,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691358379] [2020-10-14 05:13:23,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:13:23,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:13:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:23,706 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-14 05:13:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:23,767 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-14 05:13:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:13:23,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:13:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:23,768 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:13:23,769 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:13:23,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:13:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-14 05:13:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:13:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 05:13:23,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-14 05:13:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:23,777 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 05:13:23,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:13:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 05:13:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:23,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:23,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:23,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:13:23,779 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1784650519, now seen corresponding path program 3 times [2020-10-14 05:13:23,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:23,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899035527] [2020-10-14 05:13:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:23,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 05:13:23,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:13:23,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:23,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:13:23,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:23,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:23,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:23,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:23,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899035527] [2020-10-14 05:13:23,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:23,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:13:23,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215980823] [2020-10-14 05:13:23,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:13:23,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:13:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:23,984 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-14 05:13:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:24,043 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-14 05:13:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:13:24,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:13:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:24,045 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:13:24,045 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:13:24,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:13:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-14 05:13:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:13:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-14 05:13:24,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2020-10-14 05:13:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:24,054 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-14 05:13:24,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:13:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-14 05:13:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:13:24,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:24,055 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:24,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:13:24,055 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash 662342572, now seen corresponding path program 4 times [2020-10-14 05:13:24,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:24,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101114792] [2020-10-14 05:13:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:24,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:24,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:24,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:13:24,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-14 05:13:24,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:24,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:13:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:13:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:26,553 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2020-10-14 05:13:28,753 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse35 (div c_main_~y~0 2)) (.cse21 (div c_main_~x~0 2))) (let ((.cse34 (* .cse21 (- 2))) (.cse3 (* 2 .cse35)) (.cse7 (* 2 .cse21)) (.cse31 (* 4294967296 (div c_main_~y~0 4294967296)))) (let ((.cse13 (<= .cse31 c_main_~y~0)) (.cse5 (= c_main_~x~0 .cse7)) (.cse32 (* 4294967296 (div c_main_~x~0 4294967296))) (.cse33 (* .cse35 (- 2))) (.cse12 (= c_main_~y~0 .cse3)) (.cse30 (div (+ .cse34 c_main_~x~0 (- 2)) 4294967296))) (let ((.cse29 (div (+ .cse34 c_main_~x~0) 4294967296)) (.cse8 (* 4294967296 .cse30)) (.cse19 (< c_main_~y~0 .cse31)) (.cse20 (not .cse12)) (.cse10 (* 4294967296 (div (+ c_main_~y~0 .cse33 (- 2)) 4294967296))) (.cse26 (< c_main_~x~0 .cse32)) (.cse27 (not .cse5)) (.cse2 (* 4294967296 (div (+ c_main_~y~0 .cse33) 4294967296))) (.cse23 (or .cse12 .cse13))) (let ((.cse14 (and (<= c_main_~y~0 (+ .cse2 .cse3)) .cse23)) (.cse4 (and .cse26 .cse27)) (.cse18 (and .cse19 .cse20 (<= c_main_~y~0 (+ .cse10 .cse3)))) (.cse16 (+ c_main_~x~0 .cse10 .cse3)) (.cse11 (+ .cse7 c_main_~y~0 .cse8)) (.cse15 (+ c_main_~x~0 .cse10 .cse3 2)) (.cse17 (+ .cse7 c_main_~y~0 .cse8 2)) (.cse9 (+ c_main_~x~0 .cse2 .cse3)) (.cse1 (+ .cse7 (* 4294967296 .cse29) c_main_~y~0)) (.cse6 (<= .cse32 c_main_~x~0))) (and (let ((.cse0 (and .cse19 .cse20))) (or (and (or .cse0 (and (or (< .cse1 (+ c_main_~x~0 .cse2 .cse3 1)) .cse4) (or .cse5 .cse6 (< (+ .cse7 c_main_~y~0 .cse8 1) .cse9)))) (or (and (or (< .cse1 (+ c_main_~x~0 .cse10 .cse3 3)) .cse4) (or (< .cse11 (+ c_main_~x~0 .cse10 .cse3 1)) .cse5 .cse6)) .cse12 .cse13)) .cse14 (and (or .cse12 (and (or (< .cse1 .cse15) .cse4) (or .cse5 .cse6 (< .cse11 .cse16))) .cse13) (or .cse0 (and (or .cse5 .cse6 (< .cse17 .cse9)) (or .cse4 (< .cse1 .cse9))))) .cse18)) (let ((.cse25 (or .cse5 .cse6))) (or (and (or (<= 4 c_main_~x~0) (< 1 .cse21)) (or (<= .cse21 1) (let ((.cse28 (+ .cse30 1)) (.cse24 (+ .cse29 1))) (and (let ((.cse22 (+ c_main_~y~0 4))) (or (and .cse19 (<= .cse16 .cse22) .cse20) (and (<= .cse9 .cse22) .cse23) (and (<= .cse24 0) .cse25) (and .cse26 .cse27 (<= .cse28 0)))) (or .cse14 (and (or .cse5 .cse6 (< 0 .cse28)) (or (< 0 .cse24) .cse4)) .cse18))))) (and .cse19 .cse20 (or (and .cse26 .cse27 (<= .cse16 .cse11)) (and (<= .cse15 .cse1) .cse25))) (and (or (and (<= .cse9 .cse17) .cse26 .cse27) (and .cse25 (<= .cse9 .cse1))) .cse23))) (< .cse31 (+ c_main_~y~0 1)))))))) is different from true [2020-10-14 05:13:28,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:28,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:28,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:28,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:28,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2020-10-14 05:13:28,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101114792] [2020-10-14 05:13:28,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:28,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:13:28,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341417677] [2020-10-14 05:13:28,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:13:28,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:13:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2020-10-14 05:13:28,809 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-10-14 05:13:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:28,937 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-14 05:13:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:13:28,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 05:13:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:28,939 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:13:28,939 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:13:28,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2020-10-14 05:13:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:13:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:13:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:13:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 05:13:28,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-10-14 05:13:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:28,949 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 05:13:28,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:13:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 05:13:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:13:28,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:28,950 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:28,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:13:28,950 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash -224607324, now seen corresponding path program 4 times [2020-10-14 05:13:28,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:28,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653804331] [2020-10-14 05:13:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:29,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:29,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:13:29,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:29,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 05:13:29,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:29,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:29,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:13:29,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:29,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:13:29,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:29,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:29,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:29,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:29,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:29,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:29,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:29,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:29,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:29,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653804331] [2020-10-14 05:13:29,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:29,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:13:29,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110818156] [2020-10-14 05:13:29,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:29,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:29,186 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-14 05:13:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:29,291 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-14 05:13:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:13:29,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:13:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:29,294 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:13:29,294 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:13:29,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:13:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-14 05:13:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:13:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 05:13:29,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-10-14 05:13:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:29,313 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 05:13:29,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 05:13:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:13:29,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:29,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:29,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:13:29,319 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1931383913, now seen corresponding path program 5 times [2020-10-14 05:13:29,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:29,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519633424] [2020-10-14 05:13:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:29,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:29,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:13:29,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-14 05:13:29,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:29,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:29,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:13:29,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:29,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:29,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:29,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:29,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:29,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:29,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:29,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:29,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:29,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:29,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:29,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519633424] [2020-10-14 05:13:29,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:29,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:29,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646118058] [2020-10-14 05:13:29,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:29,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:29,755 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-14 05:13:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:29,897 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-14 05:13:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:29,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:13:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:29,899 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:13:29,899 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:13:29,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:13:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-14 05:13:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:13:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 05:13:29,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2020-10-14 05:13:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:29,921 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 05:13:29,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 05:13:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:13:29,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:29,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:29,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:13:29,928 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash 33316767, now seen corresponding path program 5 times [2020-10-14 05:13:29,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:29,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643172011] [2020-10-14 05:13:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:13:30,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:30,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-14 05:13:30,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:30,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:13:30,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:30,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:30,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:30,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:30,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:30,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:30,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643172011] [2020-10-14 05:13:30,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:30,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:30,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505820747] [2020-10-14 05:13:30,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:30,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:30,311 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-10-14 05:13:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:30,432 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 05:13:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:30,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:13:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:30,435 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:13:30,435 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:13:30,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:13:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-14 05:13:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:13:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 05:13:30,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2020-10-14 05:13:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:30,452 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 05:13:30,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 05:13:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:13:30,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:30,454 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:30,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:13:30,455 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:30,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1709400550, now seen corresponding path program 6 times [2020-10-14 05:13:30,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:30,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591340338] [2020-10-14 05:13:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:13:30,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:30,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 05:13:30,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:13:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:30,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:13:30,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:32,943 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse32 (div c_main_~x~0 2)) (.cse29 (* 4294967296 (div c_main_~y~0 4294967296)))) (and (or (let ((.cse33 (div c_main_~y~0 2)) (.cse31 (* .cse32 (- 2)))) (let ((.cse10 (div (+ .cse31 c_main_~x~0 (- 2)) 4294967296)) (.cse30 (* .cse33 (- 2))) (.cse12 (* 2 .cse33)) (.cse28 (* 4294967296 (div c_main_~x~0 4294967296))) (.cse14 (* 2 .cse32))) (let ((.cse23 (<= .cse29 c_main_~y~0)) (.cse20 (= c_main_~x~0 .cse14)) (.cse21 (<= .cse28 c_main_~x~0)) (.cse22 (= c_main_~y~0 .cse12)) (.cse11 (* 4294967296 (div (+ c_main_~y~0 .cse30 (- 2)) 4294967296))) (.cse0 (div (+ .cse31 c_main_~x~0) 4294967296)) (.cse15 (* 4294967296 .cse10)) (.cse27 (* 4294967296 (div (+ c_main_~y~0 .cse30) 4294967296)))) (let ((.cse17 (+ c_main_~x~0 .cse27 .cse12 1)) (.cse18 (+ .cse14 c_main_~y~0 .cse15 1)) (.cse13 (+ c_main_~x~0 .cse27 .cse12)) (.cse8 (+ .cse14 (* 4294967296 .cse0) c_main_~y~0)) (.cse7 (+ c_main_~x~0 .cse11 .cse12 3)) (.cse6 (+ .cse14 c_main_~y~0 .cse15)) (.cse5 (+ c_main_~x~0 .cse11 .cse12 1)) (.cse2 (< c_main_~y~0 .cse29)) (.cse9 (not .cse22)) (.cse1 (or .cse20 .cse21)) (.cse16 (or .cse22 .cse23)) (.cse3 (< c_main_~x~0 .cse28)) (.cse4 (not .cse20))) (and (or (and (<= (+ .cse0 1) 0) .cse1) (and .cse2 (or (and .cse3 .cse4 (<= .cse5 .cse6)) (and (<= .cse7 .cse8) .cse1)) .cse9) (and .cse3 .cse4 (<= (+ .cse10 1) 0)) (and .cse2 .cse9 (or (and .cse3 .cse4 (<= (+ c_main_~x~0 .cse11 .cse12) .cse6)) (and (<= (+ c_main_~x~0 .cse11 .cse12 2) .cse8) .cse1))) (and (or (and (<= .cse13 (+ .cse14 c_main_~y~0 .cse15 2)) .cse3 .cse4) (and .cse1 (<= .cse13 .cse8))) .cse16) (and .cse16 (or (and (<= .cse17 .cse8) .cse1) (and .cse3 .cse4 (<= .cse13 .cse18)))) (<= c_main_~x~0 6)) (let ((.cse19 (and .cse3 .cse4))) (or (and (or (and .cse2 .cse9) (and (or (< .cse8 .cse17) .cse19) (or .cse20 .cse21 (< .cse18 .cse13)))) (or (and (or (< .cse8 .cse7) .cse19) (or (< .cse6 .cse5) .cse20 .cse21)) .cse22 .cse23)) (let ((.cse26 (+ .cse11 .cse12)) (.cse25 (and (or (< 0 .cse10) .cse20 .cse21) (or (< 0 .cse0) .cse19))) (.cse24 (+ .cse27 .cse12))) (and (or (and (<= c_main_~y~0 .cse24) .cse16) .cse25 (and .cse2 .cse9 (<= c_main_~y~0 .cse26))) (or (and .cse3 .cse4 (<= .cse10 0)) (and .cse2 (<= .cse26 c_main_~y~0) .cse9) (and .cse1 (<= .cse0 0)) .cse25 (and (<= .cse24 c_main_~y~0) .cse16))))))))))) (<= .cse32 2)) (or (<= 6 c_main_~x~0) (< 2 .cse32)) (< .cse29 (+ c_main_~y~0 1)))) is different from false [2020-10-14 05:13:33,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:33,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:33,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:33,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2020-10-14 05:13:33,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591340338] [2020-10-14 05:13:33,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:33,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:13:33,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377358244] [2020-10-14 05:13:33,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:13:33,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:13:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=74, Unknown=1, NotChecked=16, Total=110 [2020-10-14 05:13:33,018 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2020-10-14 05:13:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:33,191 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-14 05:13:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:13:33,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:13:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:33,192 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:13:33,192 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:13:33,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=23, Invalid=90, Unknown=1, NotChecked=18, Total=132 [2020-10-14 05:13:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:13:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 05:13:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:13:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 05:13:33,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 22 [2020-10-14 05:13:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:33,208 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 05:13:33,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:13:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 05:13:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:13:33,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:33,209 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:33,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:13:33,210 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1209734950, now seen corresponding path program 6 times [2020-10-14 05:13:33,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:33,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990145887] [2020-10-14 05:13:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:13:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-14 05:13:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:13:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:13:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:33,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:33,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:33,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:33,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990145887] [2020-10-14 05:13:33,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:33,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:13:33,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932046529] [2020-10-14 05:13:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:13:33,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:13:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:33,556 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-14 05:13:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:33,674 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-14 05:13:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:13:33,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 05:13:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:33,675 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:13:33,676 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:13:33,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:13:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-14 05:13:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:13:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-14 05:13:33,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2020-10-14 05:13:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:33,690 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-14 05:13:33,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:13:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-14 05:13:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:13:33,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:33,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:33,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:13:33,692 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1163213789, now seen corresponding path program 7 times [2020-10-14 05:13:33,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:33,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262420717] [2020-10-14 05:13:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:13:33,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 05:13:33,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:13:33,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:33,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:13:33,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:33,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:33,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:33,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:33,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:33,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:33,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:33,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:33,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262420717] [2020-10-14 05:13:33,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:33,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:13:33,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131222358] [2020-10-14 05:13:33,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:13:33,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:13:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:13:33,984 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-14 05:13:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:34,135 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-14 05:13:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:13:34,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:13:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:34,137 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:13:34,137 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:13:34,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:13:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:13:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-14 05:13:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:13:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 05:13:34,151 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2020-10-14 05:13:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:34,151 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 05:13:34,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:13:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 05:13:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:13:34,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:34,152 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:34,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:13:34,153 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1781526699, now seen corresponding path program 7 times [2020-10-14 05:13:34,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:34,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181911589] [2020-10-14 05:13:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:34,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:13:34,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:34,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-14 05:13:34,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:34,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:13:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:13:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:34,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:34,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:34,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:34,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181911589] [2020-10-14 05:13:34,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:34,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:13:34,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520714985] [2020-10-14 05:13:34,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:13:34,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:13:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:13:34,569 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-14 05:13:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:34,727 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-14 05:13:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:13:34,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:13:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:34,730 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:13:34,731 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:13:34,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:13:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:13:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-14 05:13:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:13:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-14 05:13:34,767 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 24 [2020-10-14 05:13:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:34,768 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-14 05:13:34,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:13:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-14 05:13:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:13:34,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:34,769 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:34,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:13:34,770 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash -81622240, now seen corresponding path program 8 times [2020-10-14 05:13:34,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:34,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546298097] [2020-10-14 05:13:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:35,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:35,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:13:35,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-14 05:13:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:35,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:13:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:13:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:35,476 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:13:52,626 WARN L193 SmtUtils]: Spent 16.92 s on a formula simplification. DAG size of input: 130 DAG size of output: 27 [2020-10-14 05:13:52,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:52,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:52,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:52,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:52,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:52,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:52,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:52,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:52,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:52,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546298097] [2020-10-14 05:13:52,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:52,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:13:52,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742358613] [2020-10-14 05:13:52,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:13:52,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:13:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:13:52,684 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-10-14 05:13:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:53,013 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-14 05:13:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:13:53,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-14 05:13:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:53,014 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:13:53,014 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 05:13:53,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 05:13:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-14 05:13:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:13:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 05:13:53,028 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 26 [2020-10-14 05:13:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:53,028 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 05:13:53,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:13:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 05:13:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:13:53,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:53,029 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:53,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:13:53,030 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1517583600, now seen corresponding path program 8 times [2020-10-14 05:13:53,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:53,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352670830] [2020-10-14 05:13:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:53,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:53,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-14 05:13:53,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:53,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:13:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:13:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:53,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:53,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:53,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:13:53,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:53,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:53,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:53,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352670830] [2020-10-14 05:13:53,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:53,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:13:53,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542869435] [2020-10-14 05:13:53,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:13:53,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:13:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:13:53,527 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 11 states. [2020-10-14 05:13:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:53,755 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-14 05:13:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:13:53,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 05:13:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:53,757 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:13:53,757 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:13:53,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:13:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:13:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-14 05:13:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:13:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-14 05:13:53,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2020-10-14 05:13:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:53,781 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-14 05:13:53,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:13:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-14 05:13:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:13:53,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:53,783 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:53,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:13:53,784 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash -54229283, now seen corresponding path program 9 times [2020-10-14 05:13:53,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:53,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830325468] [2020-10-14 05:13:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:54,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:54,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:13:54,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:54,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-14 05:13:54,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:54,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:13:54,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:54,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:13:54,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:54,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:54,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:54,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:54,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:54,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:54,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:54,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:54,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830325468] [2020-10-14 05:13:54,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:54,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:13:54,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021967706] [2020-10-14 05:13:54,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:13:54,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:13:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:13:54,257 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-14 05:13:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:54,488 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 05:13:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:13:54,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 05:13:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:54,490 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:13:54,490 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:13:54,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:13:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:13:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-14 05:13:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:13:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 05:13:54,504 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 28 [2020-10-14 05:13:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:54,505 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 05:13:54,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:13:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 05:13:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:13:54,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:54,508 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:54,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:13:54,509 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1271335925, now seen corresponding path program 9 times [2020-10-14 05:13:54,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:54,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819198663] [2020-10-14 05:13:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:54,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:54,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:13:54,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:54,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-14 05:13:54,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:54,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:13:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:13:54,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:55,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:55,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:55,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:55,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:55,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:55,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:55,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:55,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:55,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:55,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:55,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:55,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819198663] [2020-10-14 05:13:55,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:55,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:13:55,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511455553] [2020-10-14 05:13:55,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:13:55,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:13:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:13:55,028 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2020-10-14 05:13:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:55,249 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-14 05:13:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:13:55,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 05:13:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:55,250 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:13:55,251 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:13:55,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:13:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:13:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-14 05:13:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:13:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-14 05:13:55,265 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 28 [2020-10-14 05:13:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:55,266 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-14 05:13:55,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:13:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-14 05:13:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:13:55,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:55,267 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:55,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:13:55,267 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash 500598618, now seen corresponding path program 10 times [2020-10-14 05:13:55,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:55,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442462146] [2020-10-14 05:13:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:55,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:55,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:13:55,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:13:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:13:55,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:56,341 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:13:56,681 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 17 [2020-10-14 05:13:56,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:56,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:56,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:56,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:56,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:56,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:56,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:56,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:56,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:56,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442462146] [2020-10-14 05:13:56,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:56,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:13:56,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743965121] [2020-10-14 05:13:56,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:13:56,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:13:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:13:56,732 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2020-10-14 05:13:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:57,336 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-14 05:13:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:13:57,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-14 05:13:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:57,337 INFO L225 Difference]: With dead ends: 58 [2020-10-14 05:13:57,337 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:13:57,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:13:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:13:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-14 05:13:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:13:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 05:13:57,349 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 30 [2020-10-14 05:13:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:57,350 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 05:13:57,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:13:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 05:13:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:13:57,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:57,351 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:57,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:13:57,351 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash -850521530, now seen corresponding path program 10 times [2020-10-14 05:13:57,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:57,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315883761] [2020-10-14 05:13:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:57,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:57,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:13:57,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 05:13:57,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:57,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:13:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:13:57,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:57,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:57,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:57,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:57,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:57,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:57,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:57,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:57,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:57,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:57,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:57,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315883761] [2020-10-14 05:13:57,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:57,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:13:57,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844367264] [2020-10-14 05:13:57,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:13:57,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:13:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:13:57,952 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-10-14 05:13:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:58,196 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-14 05:13:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:13:58,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 05:13:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:58,197 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:13:58,197 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:13:58,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:13:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:13:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-14 05:13:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:13:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-14 05:13:58,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 30 [2020-10-14 05:13:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:58,212 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-14 05:13:58,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:13:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-14 05:13:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:13:58,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:58,212 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:58,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:13:58,213 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1114266775, now seen corresponding path program 11 times [2020-10-14 05:13:58,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:58,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828265051] [2020-10-14 05:13:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:58,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:58,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:13:58,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-14 05:13:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:58,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:13:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:13:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:58,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:58,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:58,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:58,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:58,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:58,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:58,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:58,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:58,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828265051] [2020-10-14 05:13:58,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:58,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:13:58,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040417318] [2020-10-14 05:13:58,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:13:58,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:13:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:58,742 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-14 05:13:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:59,068 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-14 05:13:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:13:59,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-14 05:13:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:59,070 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:13:59,070 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:13:59,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:13:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-14 05:13:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:13:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-14 05:13:59,082 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 32 [2020-10-14 05:13:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:59,083 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-14 05:13:59,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:13:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-14 05:13:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:13:59,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:59,084 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:59,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:13:59,084 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -174813759, now seen corresponding path program 11 times [2020-10-14 05:13:59,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:59,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740254559] [2020-10-14 05:13:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:59,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:59,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:13:59,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:59,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-14 05:13:59,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:59,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:59,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:13:59,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:13:59,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:13:59,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:59,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:59,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:59,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:13:59,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:59,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:59,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:59,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:59,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740254559] [2020-10-14 05:13:59,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:59,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:13:59,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186784494] [2020-10-14 05:13:59,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:13:59,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:13:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:59,695 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2020-10-14 05:13:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:59,929 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 05:13:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:13:59,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-14 05:13:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:59,931 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:13:59,931 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:13:59,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:13:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-14 05:13:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:13:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 05:13:59,944 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 32 [2020-10-14 05:13:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:59,944 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 05:13:59,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:13:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 05:13:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:13:59,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:59,945 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:59,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:13:59,946 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1856121196, now seen corresponding path program 12 times [2020-10-14 05:13:59,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:59,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025141458] [2020-10-14 05:13:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:00,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:00,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:14:00,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:14:00,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-14 05:14:00,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:00,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:14:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:14:00,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:01,193 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 17 [2020-10-14 05:14:01,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:01,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:01,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:01,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:01,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:01,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:01,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:01,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:01,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:01,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:01,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:01,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025141458] [2020-10-14 05:14:01,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:01,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:14:01,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818710717] [2020-10-14 05:14:01,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:14:01,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:14:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:14:01,257 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-10-14 05:14:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:02,037 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-14 05:14:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:14:02,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-14 05:14:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:02,038 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:14:02,039 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:14:02,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:14:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:14:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-14 05:14:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 05:14:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-14 05:14:02,062 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 34 [2020-10-14 05:14:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:02,063 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-14 05:14:02,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:14:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-14 05:14:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:14:02,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:02,064 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:02,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:14:02,065 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 640292476, now seen corresponding path program 12 times [2020-10-14 05:14:02,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:02,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567372493] [2020-10-14 05:14:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:02,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:02,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:14:02,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:02,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 05:14:02,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:02,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:14:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:02,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:14:02,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:02,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:02,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:02,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:02,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:14:02,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:02,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:02,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567372493] [2020-10-14 05:14:02,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:02,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:14:02,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880576470] [2020-10-14 05:14:02,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:14:02,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:14:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:14:02,784 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 15 states. [2020-10-14 05:14:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:03,131 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-14 05:14:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:14:03,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 05:14:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:03,133 INFO L225 Difference]: With dead ends: 68 [2020-10-14 05:14:03,133 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:14:03,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:14:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:14:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-14 05:14:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:14:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 05:14:03,147 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 34 [2020-10-14 05:14:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:03,147 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 05:14:03,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:14:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 05:14:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:14:03,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:03,148 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:03,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:14:03,149 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -245709487, now seen corresponding path program 13 times [2020-10-14 05:14:03,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:03,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62025505] [2020-10-14 05:14:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:03,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:03,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:14:03,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:03,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:14:03,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:03,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:03,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:03,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:03,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:03,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:03,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:03,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:03,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:03,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62025505] [2020-10-14 05:14:03,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:03,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:14:03,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674811158] [2020-10-14 05:14:03,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:14:03,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:14:03,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:14:03,763 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 16 states. [2020-10-14 05:14:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:04,221 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-14 05:14:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:14:04,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 05:14:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:04,226 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:14:04,226 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:14:04,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:14:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:14:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-14 05:14:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:14:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-14 05:14:04,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 36 [2020-10-14 05:14:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:04,247 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-14 05:14:04,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:14:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-14 05:14:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:14:04,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:04,248 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:04,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:14:04,248 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2021630857, now seen corresponding path program 13 times [2020-10-14 05:14:04,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:04,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890643654] [2020-10-14 05:14:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:04,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:04,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:14:04,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-14 05:14:04,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:04,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:14:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:04,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:14:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:05,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:05,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:05,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:05,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:05,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:05,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890643654] [2020-10-14 05:14:05,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:05,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:14:05,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241129533] [2020-10-14 05:14:05,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:14:05,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:14:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:14:05,062 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-10-14 05:14:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:05,405 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-14 05:14:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:14:05,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 05:14:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:05,407 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:14:05,407 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:14:05,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:14:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:14:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-14 05:14:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:14:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 05:14:05,417 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 36 [2020-10-14 05:14:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:05,417 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 05:14:05,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:14:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 05:14:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:14:05,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:05,418 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:05,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:14:05,418 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1171716302, now seen corresponding path program 14 times [2020-10-14 05:14:05,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:05,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815161126] [2020-10-14 05:14:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:05,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:05,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:05,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:14:05,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:14:05,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-14 05:14:05,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:05,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:14:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:14:05,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:26,536 WARN L193 SmtUtils]: Spent 14.66 s on a formula simplification. DAG size of input: 143 DAG size of output: 24 [2020-10-14 05:14:26,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:26,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:26,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:26,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:26,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:26,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:26,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:26,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:26,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:26,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:26,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 194 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:26,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815161126] [2020-10-14 05:14:26,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:26,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:14:26,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050445376] [2020-10-14 05:14:26,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:14:26,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:26,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:14:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=299, Unknown=2, NotChecked=0, Total=342 [2020-10-14 05:14:26,625 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 19 states. [2020-10-14 05:14:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:27,203 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 05:14:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:14:27,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-14 05:14:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:27,204 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:14:27,204 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:14:27,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=45, Invalid=333, Unknown=2, NotChecked=0, Total=380 [2020-10-14 05:14:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:14:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-14 05:14:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:14:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-14 05:14:27,216 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 38 [2020-10-14 05:14:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:27,217 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-14 05:14:27,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:14:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-14 05:14:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:14:27,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:27,218 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:27,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:14:27,219 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash -329445454, now seen corresponding path program 14 times [2020-10-14 05:14:27,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:27,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107738516] [2020-10-14 05:14:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:27,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:27,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:14:27,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:27,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-14 05:14:27,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:27,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:27,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:14:27,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:27,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:14:27,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:28,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:28,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:28,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:28,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:28,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:28,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:28,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:28,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:28,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107738516] [2020-10-14 05:14:28,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:28,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:14:28,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025862220] [2020-10-14 05:14:28,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:14:28,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:14:28,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:14:28,141 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 17 states. [2020-10-14 05:14:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:28,652 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-14 05:14:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:14:28,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-14 05:14:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:28,654 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:14:28,655 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:14:28,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:14:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:14:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-14 05:14:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:14:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 05:14:28,677 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 38 [2020-10-14 05:14:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:28,677 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 05:14:28,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:14:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 05:14:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:14:28,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:28,679 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:28,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:14:28,679 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:28,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1813266699, now seen corresponding path program 15 times [2020-10-14 05:14:28,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:28,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766063164] [2020-10-14 05:14:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:28,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:29,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:29,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:14:29,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:29,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-14 05:14:29,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:29,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:14:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:29,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:14:29,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:29,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:29,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:29,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:29,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:29,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:29,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:29,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:29,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766063164] [2020-10-14 05:14:29,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:29,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:14:29,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258089608] [2020-10-14 05:14:29,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:14:29,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:29,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:14:29,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:14:29,685 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 18 states. [2020-10-14 05:14:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:30,395 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-14 05:14:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:14:30,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 05:14:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:30,397 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:14:30,397 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 05:14:30,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:14:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 05:14:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-14 05:14:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:14:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-14 05:14:30,418 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 40 [2020-10-14 05:14:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:30,418 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-14 05:14:30,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:14:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-14 05:14:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:14:30,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:30,420 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:30,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:14:30,420 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1931878355, now seen corresponding path program 15 times [2020-10-14 05:14:30,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955744752] [2020-10-14 05:14:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:30,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:30,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:14:30,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:14:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:31,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:31,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:31,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:31,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:14:31,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:31,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:31,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955744752] [2020-10-14 05:14:31,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:31,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:14:31,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298337816] [2020-10-14 05:14:31,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:14:31,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:14:31,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:14:31,315 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 18 states. [2020-10-14 05:14:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:31,727 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-14 05:14:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:14:31,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 05:14:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:31,733 INFO L225 Difference]: With dead ends: 80 [2020-10-14 05:14:31,733 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:14:31,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:14:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:14:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-14 05:14:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:14:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-14 05:14:31,746 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 40 [2020-10-14 05:14:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:31,747 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-14 05:14:31,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:14:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-14 05:14:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:14:31,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:31,748 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:31,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:14:31,748 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash -132092408, now seen corresponding path program 16 times [2020-10-14 05:14:31,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:31,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917452021] [2020-10-14 05:14:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:31,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:32,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:32,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:14:32,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:14:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-14 05:14:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:32,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:14:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:14:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:34,362 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2020-10-14 05:14:38,536 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:14:39,545 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:14:51,324 WARN L193 SmtUtils]: Spent 10.50 s on a formula simplification. DAG size of input: 243 DAG size of output: 22 [2020-10-14 05:14:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:51,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:51,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:51,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917452021] [2020-10-14 05:14:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:14:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149785268] [2020-10-14 05:14:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:14:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:14:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:14:51,422 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2020-10-14 05:14:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:52,120 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-14 05:14:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:14:52,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-14 05:14:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:52,121 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:14:52,121 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:14:52,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:14:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:14:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-14 05:14:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:14:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 05:14:52,134 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 42 [2020-10-14 05:14:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:52,134 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 05:14:52,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:14:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 05:14:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:14:52,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:52,135 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:52,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:14:52,136 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash 23363048, now seen corresponding path program 16 times [2020-10-14 05:14:52,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:52,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812892379] [2020-10-14 05:14:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:52,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:52,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-14 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:52,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:52,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:14:52,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:52,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:14:52,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:53,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:53,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:53,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:53,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:14:53,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:53,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:53,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:53,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:53,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:53,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812892379] [2020-10-14 05:14:53,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:53,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:14:53,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729093161] [2020-10-14 05:14:53,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:14:53,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:14:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:14:53,007 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 19 states. [2020-10-14 05:14:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:53,483 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 05:14:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:14:53,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 05:14:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:53,485 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:14:53,485 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 05:14:53,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:14:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 05:14:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-14 05:14:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:14:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-14 05:14:53,498 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 42 [2020-10-14 05:14:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:53,498 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-14 05:14:53,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:14:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-14 05:14:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:14:53,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:53,499 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:53,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:14:53,499 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1311420475, now seen corresponding path program 17 times [2020-10-14 05:14:53,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:53,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899156611] [2020-10-14 05:14:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:53,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:53,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:14:53,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:53,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:14:53,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:54,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:54,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:54,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:54,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:54,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:54,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:54,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:54,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899156611] [2020-10-14 05:14:54,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:54,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:14:54,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409990796] [2020-10-14 05:14:54,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:14:54,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:54,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:14:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:14:54,196 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-10-14 05:14:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:54,780 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-14 05:14:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:14:54,781 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 05:14:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:54,782 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:14:54,782 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:14:54,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:14:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:14:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-14 05:14:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:14:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-14 05:14:54,794 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 44 [2020-10-14 05:14:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:54,795 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-14 05:14:54,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:14:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-14 05:14:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:14:54,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:54,796 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:54,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:14:54,796 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2109642979, now seen corresponding path program 17 times [2020-10-14 05:14:54,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:54,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961909609] [2020-10-14 05:14:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:54,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:55,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:55,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:14:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:14:55,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:55,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:55,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:55,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:55,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:55,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961909609] [2020-10-14 05:14:55,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:55,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:14:55,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643773476] [2020-10-14 05:14:55,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:14:55,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:14:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:14:55,787 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 20 states. [2020-10-14 05:14:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:56,298 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-14 05:14:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:14:56,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 05:14:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:56,299 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:14:56,299 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:14:56,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:14:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:14:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-14 05:14:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:14:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 05:14:56,314 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 44 [2020-10-14 05:14:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:56,314 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 05:14:56,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:14:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 05:14:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:14:56,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:56,318 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:56,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:14:56,319 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash -774326718, now seen corresponding path program 18 times [2020-10-14 05:14:56,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:56,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588134401] [2020-10-14 05:14:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:56,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:56,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:14:56,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:14:56,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-14 05:14:56,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:56,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:56,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:14:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:14:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:14:56,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:58,990 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-14 05:15:01,132 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-14 05:15:03,607 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-14 05:15:27,521 WARN L193 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 128 DAG size of output: 24 [2020-10-14 05:15:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:27,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:27,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:27,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:27,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:27,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:27,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:27,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:27,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:27,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 318 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:27,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588134401] [2020-10-14 05:15:27,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:27,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:15:27,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215660218] [2020-10-14 05:15:27,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:15:27,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:15:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=450, Unknown=7, NotChecked=0, Total=506 [2020-10-14 05:15:27,631 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 23 states. [2020-10-14 05:15:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:28,643 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-14 05:15:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:15:28,644 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-10-14 05:15:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:28,645 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:15:28,645 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:15:28,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=61, Invalid=582, Unknown=7, NotChecked=0, Total=650 [2020-10-14 05:15:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:15:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-14 05:15:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:15:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-14 05:15:28,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 46 [2020-10-14 05:15:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:28,660 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-14 05:15:28,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:15:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-14 05:15:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:15:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:28,661 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:28,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:15:28,661 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1274929438, now seen corresponding path program 18 times [2020-10-14 05:15:28,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:28,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257405878] [2020-10-14 05:15:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:29,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:29,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:15:29,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:15:29,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:29,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:29,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:29,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:29,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:29,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:29,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:29,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:29,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257405878] [2020-10-14 05:15:29,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:29,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:15:29,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843687654] [2020-10-14 05:15:29,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:15:29,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:15:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:15:29,615 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 21 states. [2020-10-14 05:15:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:30,317 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-14 05:15:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:15:30,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 05:15:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:30,318 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:15:30,318 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:15:30,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:15:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:15:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-14 05:15:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 05:15:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-14 05:15:30,329 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 46 [2020-10-14 05:15:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-14 05:15:30,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:15:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-14 05:15:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:15:30,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:30,330 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:30,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:15:30,331 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash -23301761, now seen corresponding path program 19 times [2020-10-14 05:15:30,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:30,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088101307] [2020-10-14 05:15:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:15:30,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-14 05:15:30,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:15:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:30,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:15:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:31,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:31,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:31,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:31,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:31,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088101307] [2020-10-14 05:15:31,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:31,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:15:31,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972734638] [2020-10-14 05:15:31,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:15:31,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:15:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:15:31,122 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 22 states. [2020-10-14 05:15:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:31,834 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 05:15:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:15:31,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-14 05:15:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:31,836 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:15:31,836 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:15:31,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:15:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:15:31,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-14 05:15:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 05:15:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-14 05:15:31,850 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2020-10-14 05:15:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:31,851 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-14 05:15:31,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:15:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-14 05:15:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:15:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:31,852 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:31,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:15:31,852 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2020866407, now seen corresponding path program 19 times [2020-10-14 05:15:31,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:31,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577909231] [2020-10-14 05:15:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:15:32,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:32,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-14 05:15:32,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:15:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:15:32,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:32,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:32,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:32,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:32,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:32,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577909231] [2020-10-14 05:15:32,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:32,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:15:32,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869146626] [2020-10-14 05:15:32,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:15:32,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:15:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:15:32,759 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 22 states. [2020-10-14 05:15:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:33,349 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-14 05:15:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:15:33,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-14 05:15:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:33,352 INFO L225 Difference]: With dead ends: 96 [2020-10-14 05:15:33,352 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:15:33,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:15:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:15:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-14 05:15:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 05:15:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-14 05:15:33,367 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 48 [2020-10-14 05:15:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:33,368 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-14 05:15:33,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:15:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-14 05:15:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:15:33,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:33,369 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:33,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:15:33,369 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash 157176188, now seen corresponding path program 20 times [2020-10-14 05:15:33,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:33,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317844287] [2020-10-14 05:15:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:33,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:15:33,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:33,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:15:33,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:35,845 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:15:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:37,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:37,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:37,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:37,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317844287] [2020-10-14 05:15:37,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:37,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:15:37,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3871098] [2020-10-14 05:15:37,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:15:37,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:15:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:15:37,313 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 25 states. [2020-10-14 05:15:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:38,467 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-14 05:15:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:15:38,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-14 05:15:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:38,469 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:15:38,469 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:15:38,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:15:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:15:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-14 05:15:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 05:15:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-14 05:15:38,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 50 [2020-10-14 05:15:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:38,483 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-14 05:15:38,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:15:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-14 05:15:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:15:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:38,485 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:38,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:15:38,485 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 405190996, now seen corresponding path program 20 times [2020-10-14 05:15:38,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:38,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583081382] [2020-10-14 05:15:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:39,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:39,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:15:39,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:15:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:39,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:39,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:39,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:39,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:39,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:39,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:39,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:39,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:39,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583081382] [2020-10-14 05:15:39,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:39,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:15:39,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413416459] [2020-10-14 05:15:39,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:15:39,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:15:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:15:39,709 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 23 states. [2020-10-14 05:15:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:40,349 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-14 05:15:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:15:40,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 05:15:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:40,350 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:15:40,351 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 05:15:40,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:15:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 05:15:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-14 05:15:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:15:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 05:15:40,363 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 50 [2020-10-14 05:15:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:40,364 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 05:15:40,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:15:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 05:15:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:15:40,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:40,365 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:40,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:15:40,365 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1797793337, now seen corresponding path program 21 times [2020-10-14 05:15:40,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:40,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031096817] [2020-10-14 05:15:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:40,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:40,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:15:40,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:15:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:41,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:41,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031096817] [2020-10-14 05:15:41,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:41,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:15:41,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16047778] [2020-10-14 05:15:41,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:15:41,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:15:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:15:41,191 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 24 states. [2020-10-14 05:15:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:42,022 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-14 05:15:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:15:42,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-14 05:15:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:42,024 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:15:42,024 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:15:42,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:15:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:15:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-14 05:15:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 05:15:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-14 05:15:42,040 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 52 [2020-10-14 05:15:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:42,040 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-14 05:15:42,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:15:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-14 05:15:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:15:42,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:42,041 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:42,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:15:42,041 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash -320886449, now seen corresponding path program 21 times [2020-10-14 05:15:42,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:42,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741223608] [2020-10-14 05:15:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:15:42,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:42,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-14 05:15:42,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:15:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:42,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:15:42,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:43,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:43,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:43,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741223608] [2020-10-14 05:15:43,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:43,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:15:43,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62837319] [2020-10-14 05:15:43,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:15:43,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:15:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:15:43,121 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 24 states. [2020-10-14 05:15:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:43,814 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-14 05:15:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:15:43,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-14 05:15:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:43,816 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:15:43,816 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 05:15:43,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:15:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 05:15:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-14 05:15:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:15:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-14 05:15:43,836 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 52 [2020-10-14 05:15:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:43,836 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-14 05:15:43,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:15:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-14 05:15:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:15:43,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:43,837 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:43,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:15:43,838 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2117091402, now seen corresponding path program 22 times [2020-10-14 05:15:43,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:43,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460167660] [2020-10-14 05:15:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:15:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:15:44,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:50,475 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 115 DAG size of output: 17 [2020-10-14 05:15:50,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:50,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:50,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:50,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:50,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:50,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460167660] [2020-10-14 05:15:50,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:50,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:15:50,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292347424] [2020-10-14 05:15:50,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:15:50,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:15:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=642, Unknown=1, NotChecked=0, Total=702 [2020-10-14 05:15:50,597 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 27 states. [2020-10-14 05:15:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:51,861 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-14 05:15:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:15:51,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-14 05:15:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:51,863 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:15:51,863 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:15:51,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=71, Invalid=798, Unknown=1, NotChecked=0, Total=870 [2020-10-14 05:15:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:15:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-14 05:15:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:15:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-14 05:15:51,877 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 54 [2020-10-14 05:15:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:51,878 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-14 05:15:51,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:15:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-14 05:15:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:15:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:51,879 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:51,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:15:51,879 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1998358154, now seen corresponding path program 22 times [2020-10-14 05:15:51,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:51,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170759130] [2020-10-14 05:15:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:52,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:52,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:15:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:52,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:52,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:52,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:52,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:52,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170759130] [2020-10-14 05:15:52,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:52,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:15:52,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011393214] [2020-10-14 05:15:52,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:15:52,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:15:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:15:52,926 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 25 states. [2020-10-14 05:15:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:53,694 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-14 05:15:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:15:53,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 05:15:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:53,696 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:15:53,696 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 05:15:53,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:15:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 05:15:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-14 05:15:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 05:15:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-14 05:15:53,709 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 54 [2020-10-14 05:15:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:53,709 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-14 05:15:53,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:15:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-14 05:15:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:15:53,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:53,711 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:53,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:15:53,711 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:53,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1929974285, now seen corresponding path program 23 times [2020-10-14 05:15:53,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:53,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064157921] [2020-10-14 05:15:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:15:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:54,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:54,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:54,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:54,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:54,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:54,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:54,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:54,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064157921] [2020-10-14 05:15:54,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:54,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:15:54,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900604383] [2020-10-14 05:15:54,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:15:54,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:15:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:15:54,854 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 26 states. [2020-10-14 05:15:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:55,786 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-10-14 05:15:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:15:55,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-14 05:15:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:55,789 INFO L225 Difference]: With dead ends: 110 [2020-10-14 05:15:55,789 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:15:55,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:15:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:15:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-14 05:15:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 05:15:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-14 05:15:55,802 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 56 [2020-10-14 05:15:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:55,802 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-14 05:15:55,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:15:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-14 05:15:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:15:55,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:55,803 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:55,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:15:55,804 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1704395013, now seen corresponding path program 23 times [2020-10-14 05:15:55,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:55,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646094948] [2020-10-14 05:15:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:56,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:56,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:15:56,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:57,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:57,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:57,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:57,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:57,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:57,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:57,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:57,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646094948] [2020-10-14 05:15:57,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:57,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:15:57,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626118907] [2020-10-14 05:15:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:15:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:15:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:15:57,014 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 26 states. [2020-10-14 05:15:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:57,819 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-10-14 05:15:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:15:57,820 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-14 05:15:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:57,821 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:15:57,821 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 05:15:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:15:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 05:15:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-14 05:15:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 05:15:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-14 05:15:57,834 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 56 [2020-10-14 05:15:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:57,834 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-14 05:15:57,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:15:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-14 05:15:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:15:57,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:57,835 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:57,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:15:57,835 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1795916016, now seen corresponding path program 24 times [2020-10-14 05:15:57,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:57,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215885201] [2020-10-14 05:15:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:58,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:15:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:15:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:14,421 WARN L193 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 108 DAG size of output: 24 [2020-10-14 05:16:14,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:14,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:14,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:14,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:14,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:14,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 574 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:14,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215885201] [2020-10-14 05:16:14,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:14,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:16:14,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156792246] [2020-10-14 05:16:14,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:16:14,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:16:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=753, Unknown=3, NotChecked=0, Total=812 [2020-10-14 05:16:14,521 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 29 states. [2020-10-14 05:16:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:16,916 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-14 05:16:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:16:16,916 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-14 05:16:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:16,918 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:16:16,918 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:16:16,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=100, Invalid=1457, Unknown=3, NotChecked=0, Total=1560 [2020-10-14 05:16:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:16:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-14 05:16:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 05:16:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-14 05:16:16,939 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 58 [2020-10-14 05:16:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:16,939 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-14 05:16:16,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:16:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-14 05:16:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:16:16,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:16,940 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:16,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:16:16,940 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1621309248, now seen corresponding path program 24 times [2020-10-14 05:16:16,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:16,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597856701] [2020-10-14 05:16:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:17,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:17,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:16:17,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:17,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:16:17,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:18,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:18,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:18,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:18,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:18,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:18,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:18,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:18,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597856701] [2020-10-14 05:16:18,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:18,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:16:18,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963279500] [2020-10-14 05:16:18,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:16:18,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:18,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:16:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:16:18,417 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 27 states. [2020-10-14 05:16:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:19,309 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-10-14 05:16:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:16:19,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-14 05:16:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:19,312 INFO L225 Difference]: With dead ends: 116 [2020-10-14 05:16:19,312 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 05:16:19,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:16:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 05:16:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-14 05:16:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 05:16:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-14 05:16:19,328 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 58 [2020-10-14 05:16:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:19,328 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-14 05:16:19,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:16:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-14 05:16:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:16:19,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:19,329 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:19,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:16:19,329 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash 373770413, now seen corresponding path program 25 times [2020-10-14 05:16:19,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:19,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294219114] [2020-10-14 05:16:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:19,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:19,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:19,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:16:19,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:19,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-14 05:16:19,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:19,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:16:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:16:19,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:20,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:20,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:20,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:20,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:20,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:20,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:20,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:20,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294219114] [2020-10-14 05:16:20,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:20,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:16:20,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879099317] [2020-10-14 05:16:20,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:16:20,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:16:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:16:20,429 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 28 states. [2020-10-14 05:16:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:21,552 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-10-14 05:16:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:16:21,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-14 05:16:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:21,555 INFO L225 Difference]: With dead ends: 118 [2020-10-14 05:16:21,555 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:16:21,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:16:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:16:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-14 05:16:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:16:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-14 05:16:21,568 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 60 [2020-10-14 05:16:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:21,569 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-14 05:16:21,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:16:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-14 05:16:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:16:21,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:21,570 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:21,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:16:21,570 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2127531451, now seen corresponding path program 25 times [2020-10-14 05:16:21,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:21,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001701224] [2020-10-14 05:16:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:22,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:16:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:16:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:22,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:22,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:22,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:22,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:22,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:22,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:22,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001701224] [2020-10-14 05:16:22,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:22,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:16:22,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954579794] [2020-10-14 05:16:22,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:16:22,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:22,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:16:22,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:16:22,874 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 28 states. [2020-10-14 05:16:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:23,826 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-10-14 05:16:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:16:23,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-14 05:16:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:23,828 INFO L225 Difference]: With dead ends: 120 [2020-10-14 05:16:23,828 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:16:23,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:16:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:16:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-14 05:16:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 05:16:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-14 05:16:23,842 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 60 [2020-10-14 05:16:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:23,842 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-14 05:16:23,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:16:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-14 05:16:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:16:23,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:23,843 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:23,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:16:23,843 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -508553942, now seen corresponding path program 26 times [2020-10-14 05:16:23,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:23,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684244969] [2020-10-14 05:16:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:23,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:24,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:24,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:16:24,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:27,073 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse25 (div c_main_~x~0 2)) (.cse35 (div c_main_~y~0 2))) (let ((.cse3 (* 2 .cse35)) (.cse7 (* 2 .cse25)) (.cse31 (* 4294967296 (div c_main_~y~0 4294967296))) (.cse34 (* .cse25 (- 2)))) (let ((.cse29 (div (+ .cse34 c_main_~x~0 (- 2)) 4294967296)) (.cse13 (<= .cse31 c_main_~y~0)) (.cse33 (* .cse35 (- 2))) (.cse5 (= c_main_~x~0 .cse7)) (.cse32 (* 4294967296 (div c_main_~x~0 4294967296))) (.cse12 (= c_main_~y~0 .cse3))) (let ((.cse19 (< c_main_~y~0 .cse31)) (.cse20 (not .cse12)) (.cse21 (< c_main_~x~0 .cse32)) (.cse22 (not .cse5)) (.cse2 (* 4294967296 (div (+ c_main_~y~0 .cse33) 4294967296))) (.cse24 (or .cse12 .cse13)) (.cse30 (div (+ .cse34 c_main_~x~0) 4294967296)) (.cse10 (* 4294967296 (div (+ c_main_~y~0 .cse33 (- 2)) 4294967296))) (.cse8 (* 4294967296 .cse29))) (let ((.cse11 (+ .cse7 c_main_~y~0 .cse8)) (.cse15 (+ c_main_~x~0 .cse10 .cse3 2)) (.cse17 (+ .cse7 c_main_~y~0 .cse8 2)) (.cse1 (+ .cse7 (* 4294967296 .cse30) c_main_~y~0)) (.cse14 (and (<= c_main_~y~0 (+ .cse2 .cse3)) .cse24)) (.cse4 (and .cse21 .cse22)) (.cse18 (and .cse19 .cse20 (<= c_main_~y~0 (+ .cse10 .cse3)))) (.cse9 (+ c_main_~x~0 .cse2 .cse3)) (.cse16 (+ c_main_~x~0 .cse10 .cse3)) (.cse6 (<= .cse32 c_main_~x~0))) (and (let ((.cse0 (and .cse19 .cse20))) (or (and (or .cse0 (and (or (< .cse1 (+ c_main_~x~0 .cse2 .cse3 1)) .cse4) (or .cse5 .cse6 (< (+ .cse7 c_main_~y~0 .cse8 1) .cse9)))) (or (and (or (< .cse1 (+ c_main_~x~0 .cse10 .cse3 3)) .cse4) (or (< .cse11 (+ c_main_~x~0 .cse10 .cse3 1)) .cse5 .cse6)) .cse12 .cse13)) .cse14 (and (or .cse12 (and (or (< .cse1 .cse15) .cse4) (or .cse5 .cse6 (< .cse11 .cse16))) .cse13) (or .cse0 (and (or .cse5 .cse6 (< .cse17 .cse9)) (or .cse4 (< .cse1 .cse9))))) .cse18)) (let ((.cse23 (or .cse5 .cse6))) (or (and .cse19 .cse20 (or (and .cse21 .cse22 (<= .cse16 .cse11)) (and (<= .cse15 .cse1) .cse23))) (and (or (and (<= .cse9 .cse17) .cse21 .cse22) (and .cse23 (<= .cse9 .cse1))) .cse24) (and (or (<= 26 c_main_~x~0) (< 12 .cse25)) (or (<= .cse25 12) (let ((.cse27 (+ .cse30 1)) (.cse26 (+ .cse29 1))) (and (or .cse14 (and (or .cse5 .cse6 (< 0 .cse26)) (or (< 0 .cse27) .cse4)) .cse18) (let ((.cse28 (+ c_main_~y~0 26))) (or (and (<= .cse9 .cse28) .cse24) (and (<= .cse27 0) .cse23) (and .cse21 .cse22 (<= .cse26 0)) (and .cse19 (<= .cse16 .cse28) .cse20))))))))) (< .cse31 (+ c_main_~y~0 1)))))))) is different from false [2020-10-14 05:16:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:27,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:27,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:27,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:27,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 26 not checked. [2020-10-14 05:16:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684244969] [2020-10-14 05:16:27,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:16:27,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287915918] [2020-10-14 05:16:27,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:16:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:16:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=814, Unknown=1, NotChecked=56, Total=930 [2020-10-14 05:16:27,181 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 31 states. [2020-10-14 05:16:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:28,493 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-10-14 05:16:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:16:28,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 62 [2020-10-14 05:16:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:28,496 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:16:28,500 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 05:16:28,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=63, Invalid=870, Unknown=1, NotChecked=58, Total=992 [2020-10-14 05:16:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 05:16:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-14 05:16:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 05:16:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-14 05:16:28,516 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 62 [2020-10-14 05:16:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:28,516 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-14 05:16:28,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:16:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-14 05:16:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:16:28,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:28,517 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:28,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:16:28,517 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1285881846, now seen corresponding path program 26 times [2020-10-14 05:16:28,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:28,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039431636] [2020-10-14 05:16:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:28,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:29,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:29,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:16:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-14 05:16:29,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:29,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:16:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:16:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:30,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:30,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:30,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:30,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:30,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:30,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:30,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:30,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:30,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039431636] [2020-10-14 05:16:30,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:30,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:16:30,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581351557] [2020-10-14 05:16:30,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:16:30,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:30,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:16:30,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:16:30,205 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 29 states. [2020-10-14 05:16:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:31,466 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-14 05:16:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:16:31,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-14 05:16:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:31,472 INFO L225 Difference]: With dead ends: 124 [2020-10-14 05:16:31,472 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:16:31,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:16:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:16:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-14 05:16:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 05:16:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 05:16:31,501 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 62 [2020-10-14 05:16:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:31,501 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 05:16:31,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:16:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 05:16:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:16:31,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:31,503 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:31,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:16:31,504 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1981265511, now seen corresponding path program 27 times [2020-10-14 05:16:31,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:31,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451226102] [2020-10-14 05:16:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:32,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:16:32,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:32,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:16:32,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:33,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:33,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:33,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:33,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451226102] [2020-10-14 05:16:33,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:33,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:16:33,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642391429] [2020-10-14 05:16:33,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:16:33,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:16:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:16:33,447 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 30 states. [2020-10-14 05:16:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:34,762 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-10-14 05:16:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:16:34,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-14 05:16:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:34,764 INFO L225 Difference]: With dead ends: 126 [2020-10-14 05:16:34,764 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:16:34,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:16:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:16:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-14 05:16:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 05:16:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-14 05:16:34,784 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 64 [2020-10-14 05:16:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:34,784 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-14 05:16:34,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:16:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-14 05:16:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:16:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:34,785 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:34,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:16:34,786 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -85536911, now seen corresponding path program 27 times [2020-10-14 05:16:34,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:34,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307891007] [2020-10-14 05:16:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:35,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:35,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:16:35,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:16:35,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:36,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:36,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:36,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:36,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:36,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:36,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:36,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307891007] [2020-10-14 05:16:36,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:36,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:16:36,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427260507] [2020-10-14 05:16:36,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:16:36,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:16:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:16:36,647 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 30 states. [2020-10-14 05:16:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:37,727 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-14 05:16:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:16:37,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-14 05:16:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:37,729 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:16:37,729 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:16:37,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:16:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:16:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-14 05:16:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 05:16:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-14 05:16:37,745 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 64 [2020-10-14 05:16:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:37,745 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-14 05:16:37,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:16:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-14 05:16:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:16:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:37,746 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:37,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:16:37,747 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1893991324, now seen corresponding path program 28 times [2020-10-14 05:16:37,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:37,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152127643] [2020-10-14 05:16:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:38,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:38,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:16:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:16:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:41,306 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:16:43,467 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:16:44,116 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2020-10-14 05:16:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:47,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:47,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:47,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:47,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:47,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:47,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152127643] [2020-10-14 05:16:47,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:47,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:16:47,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887162849] [2020-10-14 05:16:47,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:16:47,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:16:47,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=987, Unknown=1, NotChecked=0, Total=1056 [2020-10-14 05:16:47,764 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 33 states. [2020-10-14 05:16:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:50,153 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-10-14 05:16:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:16:50,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-10-14 05:16:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:50,154 INFO L225 Difference]: With dead ends: 130 [2020-10-14 05:16:50,155 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:16:50,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=104, Invalid=1617, Unknown=1, NotChecked=0, Total=1722 [2020-10-14 05:16:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:16:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-14 05:16:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 05:16:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-14 05:16:50,173 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 66 [2020-10-14 05:16:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:50,174 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-14 05:16:50,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:16:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-14 05:16:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:16:50,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:50,175 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:50,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:16:50,175 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 535997484, now seen corresponding path program 28 times [2020-10-14 05:16:50,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:50,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416543696] [2020-10-14 05:16:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:51,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:16:51,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:51,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:51,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:51,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:51,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416543696] [2020-10-14 05:16:51,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:51,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:16:51,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883036630] [2020-10-14 05:16:51,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:16:51,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:16:51,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:16:51,956 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 31 states. [2020-10-14 05:16:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:53,111 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-10-14 05:16:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:16:53,113 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-14 05:16:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:53,114 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:16:53,114 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:16:53,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:16:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:16:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-14 05:16:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 05:16:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-14 05:16:53,132 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 66 [2020-10-14 05:16:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:53,132 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-14 05:16:53,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:16:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-14 05:16:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:16:53,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:53,133 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:53,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:16:53,134 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:53,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2015803169, now seen corresponding path program 29 times [2020-10-14 05:16:53,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:53,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798002214] [2020-10-14 05:16:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:53,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:16:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:16:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:54,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:54,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:54,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:54,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:54,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:54,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:54,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:54,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:54,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:54,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:54,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798002214] [2020-10-14 05:16:54,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:54,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:16:54,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602965107] [2020-10-14 05:16:54,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:16:54,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:16:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:16:54,680 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 32 states. [2020-10-14 05:16:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:56,197 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-10-14 05:16:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:16:56,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-14 05:16:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:56,201 INFO L225 Difference]: With dead ends: 134 [2020-10-14 05:16:56,201 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 05:16:56,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:16:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 05:16:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-14 05:16:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:16:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-14 05:16:56,216 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 68 [2020-10-14 05:16:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:56,216 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-14 05:16:56,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:16:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-14 05:16:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:16:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:56,217 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:56,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:16:56,218 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash 830096935, now seen corresponding path program 29 times [2020-10-14 05:16:56,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:56,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116723091] [2020-10-14 05:16:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:56,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:57,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:16:57,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:58,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:58,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:58,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:58,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116723091] [2020-10-14 05:16:58,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:58,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:16:58,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784086086] [2020-10-14 05:16:58,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:16:58,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:16:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:16:58,039 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 32 states. [2020-10-14 05:16:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:59,323 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-10-14 05:16:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:16:59,327 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-14 05:16:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:59,329 INFO L225 Difference]: With dead ends: 136 [2020-10-14 05:16:59,329 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:16:59,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:16:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:16:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-14 05:16:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:16:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-14 05:16:59,347 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 68 [2020-10-14 05:16:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:59,347 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-14 05:16:59,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:16:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-14 05:16:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:16:59,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:59,348 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:59,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:16:59,349 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1231926942, now seen corresponding path program 30 times [2020-10-14 05:16:59,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:59,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036296714] [2020-10-14 05:16:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:00,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:00,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:17:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:16,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:16,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:16,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:17:16,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:16,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:16,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 19 proven. 864 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-14 05:17:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036296714] [2020-10-14 05:17:16,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:16,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:17:16,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835192909] [2020-10-14 05:17:16,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:17:16,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:17:16,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=732, Unknown=2, NotChecked=0, Total=812 [2020-10-14 05:17:16,491 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 29 states. [2020-10-14 05:17:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:19,195 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-10-14 05:17:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:17:19,195 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-10-14 05:17:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:19,197 INFO L225 Difference]: With dead ends: 138 [2020-10-14 05:17:19,197 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:17:19,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=182, Invalid=2266, Unknown=2, NotChecked=0, Total=2450 [2020-10-14 05:17:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:17:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-14 05:17:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 05:17:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-14 05:17:19,213 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 70 [2020-10-14 05:17:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:19,213 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-14 05:17:19,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:17:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-14 05:17:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:17:19,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:19,214 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:19,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:17:19,215 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash -8172190, now seen corresponding path program 30 times [2020-10-14 05:17:19,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:19,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356346864] [2020-10-14 05:17:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:19,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:20,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:20,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:17:20,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:21,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:21,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:21,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:21,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:21,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356346864] [2020-10-14 05:17:21,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:21,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:17:21,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201500353] [2020-10-14 05:17:21,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:17:21,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:17:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:17:21,668 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 33 states.