/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/array-examples/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:34:24,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:34:24,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:34:24,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:34:24,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:34:24,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:34:24,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:34:24,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:34:24,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:34:24,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:34:24,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:34:24,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:34:24,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:34:24,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:34:24,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:34:24,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:34:24,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:34:24,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:34:24,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:34:24,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:34:24,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:34:24,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:34:24,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:34:24,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:34:24,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:34:24,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:34:24,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:34:24,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:34:24,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:34:24,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:34:24,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:34:24,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:34:24,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:34:24,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:34:24,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:34:24,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:34:24,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:34:24,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:34:24,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:34:24,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:34:24,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:34:24,349 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 [2020-10-13 23:34:24,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:34:24,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:34:24,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:34:24,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:34:24,403 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:34:24,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:34:24,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:34:24,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:34:24,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:34:24,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:34:24,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:34:24,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:34:24,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:34:24,408 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:34:24,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:34:24,409 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:34:24,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:34:24,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:34:24,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:34:24,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:34:24,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:34:24,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:24,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:34:24,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:34:24,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:34:24,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:34:24,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:34:24,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:34:24,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:34:24,412 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; [2020-10-13 23:34:24,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:34:24,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:34:24,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:34:24,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:34:24,759 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:34:24,760 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-13 23:34:24,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21beb18e/985b383ae40b4a7e9a1d01dd84c151b8/FLAGccf1c706d [2020-10-13 23:34:25,257 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:34:25,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-13 23:34:25,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21beb18e/985b383ae40b4a7e9a1d01dd84c151b8/FLAGccf1c706d [2020-10-13 23:34:25,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21beb18e/985b383ae40b4a7e9a1d01dd84c151b8 [2020-10-13 23:34:25,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:34:25,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:34:25,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:25,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:34:25,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:34:25,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:25,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3a7124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25, skipping insertion in model container [2020-10-13 23:34:25,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:25,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:34:25,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:34:25,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:25,892 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:34:25,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:25,935 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:34:25,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25 WrapperNode [2020-10-13 23:34:25,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:25,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:34:25,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:34:25,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:34:26,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (1/1) ... [2020-10-13 23:34:26,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:34:26,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:34:26,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:34:26,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:34:26,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (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 [2020-10-13 23:34:26,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:34:26,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:34:26,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:34:26,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:34:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:34:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:34:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:34:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:34:26,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:34:26,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:34:26,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:34:26,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:34:26,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:34:26,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:34:26,428 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:34:26,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:26 BoogieIcfgContainer [2020-10-13 23:34:26,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:34:26,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:34:26,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:34:26,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:34:26,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:34:25" (1/3) ... [2020-10-13 23:34:26,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152734c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:26, skipping insertion in model container [2020-10-13 23:34:26,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:25" (2/3) ... [2020-10-13 23:34:26,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152734c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:26, skipping insertion in model container [2020-10-13 23:34:26,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:26" (3/3) ... [2020-10-13 23:34:26,461 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2020-10-13 23:34:26,471 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:34:26,479 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:34:26,493 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:34:26,516 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:34:26,516 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:34:26,516 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:34:26,516 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:34:26,516 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:34:26,517 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:34:26,517 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:34:26,517 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:34:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 23:34:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:26,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:26,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:26,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:26,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2020-10-13 23:34:26,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:26,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539053495] [2020-10-13 23:34:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:27,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:27,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-13 23:34:27,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:27,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:27,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:27,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:34:27,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:27,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:34:27,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:27,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:27,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:27,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:34:27,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:27,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:27,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539053495] [2020-10-13 23:34:27,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:27,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:34:27,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002846043] [2020-10-13 23:34:27,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:34:27,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:27,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:34:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:27,201 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 23:34:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:27,302 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-13 23:34:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:34:27,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:34:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:27,312 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:34:27,312 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:34:27,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:34:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 23:34:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:34:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 23:34:27,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-13 23:34:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:27,353 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 23:34:27,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:34:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 23:34:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:27,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:27,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:27,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:34:27,355 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2020-10-13 23:34:27,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:27,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656612726] [2020-10-13 23:34:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:27,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:27,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-13 23:34:27,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:27,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:34:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:34:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:34:27,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:27,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:27,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:27,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:27,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:27,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:27,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656612726] [2020-10-13 23:34:27,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:27,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:34:27,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639757926] [2020-10-13 23:34:27,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:34:27,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:27,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:34:27,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:27,616 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 23:34:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:27,722 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-13 23:34:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:34:27,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:34:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:27,723 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:34:27,724 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:34:27,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:34:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-13 23:34:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:34:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 23:34:27,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-13 23:34:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:27,734 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 23:34:27,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:34:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 23:34:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:34:27,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:27,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:27,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:34:27,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2020-10-13 23:34:27,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:27,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125804968] [2020-10-13 23:34:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:28,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:34:28,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:28,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 23:34:28,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:28,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:28,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:34:28,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:34:28,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:34:28,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:28,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:28,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:28,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:28,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:28,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:28,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:28,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:28,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:34:28,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125804968] [2020-10-13 23:34:28,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:28,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:34:28,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208808408] [2020-10-13 23:34:28,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:34:28,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:34:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:28,645 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 23:34:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:28,738 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-13 23:34:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:34:28,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 23:34:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:28,740 INFO L225 Difference]: With dead ends: 53 [2020-10-13 23:34:28,740 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:34:28,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:34:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 23:34:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:34:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 23:34:28,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-13 23:34:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:28,748 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 23:34:28,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:34:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 23:34:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:34:28,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:28,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:28,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:34:28,750 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2020-10-13 23:34:28,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:28,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655668180] [2020-10-13 23:34:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:28,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:31,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:34:31,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2537 [2020-10-13 23:34:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:31,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:34:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:34:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:34:31,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:34:31,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:31,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:34:31,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:31,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:31,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:31,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:31,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:34:31,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655668180] [2020-10-13 23:34:31,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:31,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:34:31,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018376832] [2020-10-13 23:34:31,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:34:31,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:34:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:31,395 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-13 23:34:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:31,563 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-13 23:34:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:34:31,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:34:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:31,566 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:34:31,567 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:34:31,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:34:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-13 23:34:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:34:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 23:34:31,582 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-13 23:34:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:31,583 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 23:34:31,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:34:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 23:34:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:34:31,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:31,585 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:31,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:34:31,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2020-10-13 23:34:31,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:31,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697931054] [2020-10-13 23:34:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:34:36,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:36,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:34:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:34:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:34:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:34:36,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 23:34:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:36,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:36,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:36,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:36,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:34:36,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697931054] [2020-10-13 23:34:36,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:36,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:34:36,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951120018] [2020-10-13 23:34:36,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:34:36,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:34:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:36,687 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2020-10-13 23:34:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:36,835 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-13 23:34:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:34:36,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 23:34:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:36,837 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:34:36,837 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:34:36,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:34:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 23:34:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:34:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 23:34:36,854 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2020-10-13 23:34:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:36,855 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 23:34:36,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:34:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 23:34:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:34:36,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:36,856 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:36,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:34:36,856 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2020-10-13 23:34:36,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:36,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412803074] [2020-10-13 23:34:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:36,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:34:41,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:41,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:34:41,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:34:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:34:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:34:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:34:41,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:41,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:41,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:41,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:41,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:41,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 23:34:41,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412803074] [2020-10-13 23:34:41,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:41,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:34:41,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303109394] [2020-10-13 23:34:41,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:34:41,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:34:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:41,964 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-10-13 23:34:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:42,102 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 23:34:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:34:42,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 23:34:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:42,104 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:34:42,104 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:34:42,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:34:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 23:34:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:34:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 23:34:42,118 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2020-10-13 23:34:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:42,118 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 23:34:42,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:34:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 23:34:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:34:42,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:42,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:42,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:34:42,123 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2020-10-13 23:34:42,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:42,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511690767] [2020-10-13 23:34:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:47,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:34:47,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:47,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-13 23:34:47,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:47,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:34:47,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:34:47,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:34:47,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:34:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:47,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:47,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:47,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:47,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:47,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:34:47,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511690767] [2020-10-13 23:34:47,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:47,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:34:47,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403062290] [2020-10-13 23:34:47,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:34:47,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:34:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:47,323 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 9 states. [2020-10-13 23:34:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:47,468 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-13 23:34:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:34:47,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 23:34:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:47,470 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:34:47,470 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:34:47,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:34:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 23:34:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:34:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 23:34:47,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-10-13 23:34:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:47,478 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 23:34:47,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:34:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 23:34:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:34:47,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:47,479 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:47,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:34:47,479 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2020-10-13 23:34:47,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:47,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036442200] [2020-10-13 23:34:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:52,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:52,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:34:52,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:52,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:34:52,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:52,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:34:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:34:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:34:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:52,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:52,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:52,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:52,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:52,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:52,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:52,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:52,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 23:34:52,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036442200] [2020-10-13 23:34:52,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:52,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:34:52,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164997811] [2020-10-13 23:34:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:34:52,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:34:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:52,596 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 10 states. [2020-10-13 23:34:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:52,769 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 23:34:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:34:52,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-13 23:34:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:52,771 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:34:52,771 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:34:52,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:34:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-13 23:34:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 23:34:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 23:34:52,786 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2020-10-13 23:34:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:52,787 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 23:34:52,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:34:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 23:34:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:34:52,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:52,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:52,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:34:52,790 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2020-10-13 23:34:52,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:52,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224633980] [2020-10-13 23:34:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:57,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:57,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:34:57,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:57,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:57,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:57,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:57,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:57,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:57,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:57,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-13 23:34:57,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224633980] [2020-10-13 23:34:57,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:57,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:34:57,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385178795] [2020-10-13 23:34:57,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:34:57,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:57,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:34:57,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:34:57,932 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 11 states. [2020-10-13 23:34:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:58,145 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2020-10-13 23:34:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:34:58,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 23:34:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:58,147 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:34:58,147 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:34:58,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:34:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:34:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 23:34:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:34:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-13 23:34:58,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2020-10-13 23:34:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:58,163 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-13 23:34:58,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:34:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-13 23:34:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:34:58,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:58,165 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:58,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:34:58,165 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2020-10-13 23:34:58,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:58,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898095750] [2020-10-13 23:34:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:35:03,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:35:03,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:35:03,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:03,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:03,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:03,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:03,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:35:03,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898095750] [2020-10-13 23:35:03,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:03,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:35:03,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768357611] [2020-10-13 23:35:03,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:35:03,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:03,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:35:03,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:03,308 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 12 states. [2020-10-13 23:35:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:03,464 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-13 23:35:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:35:03,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-13 23:35:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:03,466 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:35:03,466 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:35:03,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:35:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-13 23:35:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:35:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 23:35:03,476 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2020-10-13 23:35:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:03,477 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 23:35:03,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:35:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 23:35:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:35:03,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:03,484 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:03,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:35:03,484 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2020-10-13 23:35:03,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:03,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282346834] [2020-10-13 23:35:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:08,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:08,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:35:08,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:08,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:35:08,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:08,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:35:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:35:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:35:08,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:08,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:08,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:08,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:08,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:08,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:08,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-13 23:35:08,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282346834] [2020-10-13 23:35:08,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:08,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:35:08,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556714670] [2020-10-13 23:35:08,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:35:08,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:35:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:08,631 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 13 states. [2020-10-13 23:35:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:08,829 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 23:35:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:35:08,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-13 23:35:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:08,831 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:35:08,831 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:35:08,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:35:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-13 23:35:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:35:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-13 23:35:08,844 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2020-10-13 23:35:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:08,847 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-13 23:35:08,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:35:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-13 23:35:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:35:08,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:08,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:08,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:35:08,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2020-10-13 23:35:08,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:08,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545354086] [2020-10-13 23:35:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:13,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:13,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:35:13,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:35:13,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:14,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:14,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:14,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 23:35:14,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545354086] [2020-10-13 23:35:14,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:14,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:35:14,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597033681] [2020-10-13 23:35:14,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:35:14,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:35:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:14,014 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 14 states. [2020-10-13 23:35:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:14,211 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-13 23:35:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:35:14,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-13 23:35:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:14,213 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:35:14,213 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:35:14,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:35:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-13 23:35:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:35:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-13 23:35:14,221 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2020-10-13 23:35:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:14,222 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-13 23:35:14,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:35:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-13 23:35:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:35:14,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:14,223 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:14,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:35:14,224 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2020-10-13 23:35:14,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:14,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618191157] [2020-10-13 23:35:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:35:19,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:35:19,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:19,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:19,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:19,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:19,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:19,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:19,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-13 23:35:19,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618191157] [2020-10-13 23:35:19,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:35:19,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191199191] [2020-10-13 23:35:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:35:19,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:35:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:19,408 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 15 states. [2020-10-13 23:35:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:19,627 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-10-13 23:35:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:35:19,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-13 23:35:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:19,629 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:35:19,629 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:35:19,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:35:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-13 23:35:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:35:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:35:19,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2020-10-13 23:35:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:19,642 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:35:19,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:35:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:35:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:35:19,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:19,643 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:19,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:35:19,646 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2020-10-13 23:35:19,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:19,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154014582] [2020-10-13 23:35:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:35:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:35:24,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:35:24,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:24,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:35:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:24,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:24,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:35:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-13 23:35:24,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154014582] [2020-10-13 23:35:24,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:24,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:35:24,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138956847] [2020-10-13 23:35:24,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:35:24,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:35:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:24,878 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 16 states. [2020-10-13 23:35:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:25,172 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2020-10-13 23:35:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:35:25,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-13 23:35:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:25,174 INFO L225 Difference]: With dead ends: 152 [2020-10-13 23:35:25,175 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:35:25,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:35:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-13 23:35:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:35:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-13 23:35:25,198 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2020-10-13 23:35:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:25,200 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-13 23:35:25,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:35:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-13 23:35:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:35:25,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:25,202 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:25,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:35:25,203 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2020-10-13 23:35:25,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:25,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697954617] [2020-10-13 23:35:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:25,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:30,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:35:30,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:30,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 23:35:30,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:30,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:35:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:35:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:35:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:30,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:30,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:30,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:30,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:30,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:30,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-13 23:35:30,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697954617] [2020-10-13 23:35:30,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:30,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:35:30,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867893462] [2020-10-13 23:35:30,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:35:30,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:35:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:30,485 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 17 states. [2020-10-13 23:35:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:30,720 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2020-10-13 23:35:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:35:30,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-13 23:35:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:30,721 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:35:30,721 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:35:30,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:35:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 23:35:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:35:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 23:35:30,738 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2020-10-13 23:35:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:30,738 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 23:35:30,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:35:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 23:35:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:35:30,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:30,740 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:30,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:35:30,740 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2020-10-13 23:35:30,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:30,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53556642] [2020-10-13 23:35:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:30,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:35,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:35:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:35:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:35:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:35,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:35,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:35,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:35,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-13 23:35:35,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53556642] [2020-10-13 23:35:35,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:35,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:35:35,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67229170] [2020-10-13 23:35:35,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:35:35,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:35:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:35,971 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 18 states. [2020-10-13 23:35:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:36,183 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 23:35:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:35:36,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-13 23:35:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:36,184 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:35:36,184 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:35:36,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:35:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 23:35:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:35:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 23:35:36,191 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2020-10-13 23:35:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:36,191 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 23:35:36,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:35:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 23:35:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:35:36,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:36,193 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:36,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:35:36,193 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2020-10-13 23:35:36,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:36,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443974744] [2020-10-13 23:35:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:41,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:35:41,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:35:41,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:41,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:41,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:41,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:41,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:41,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:41,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-13 23:35:41,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443974744] [2020-10-13 23:35:41,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:41,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:35:41,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240119921] [2020-10-13 23:35:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:35:41,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:35:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:41,417 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 19 states. [2020-10-13 23:35:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:41,679 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-13 23:35:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:35:41,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-13 23:35:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:41,681 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:35:41,681 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:35:41,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:35:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 23:35:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:35:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-13 23:35:41,687 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2020-10-13 23:35:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:41,687 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-13 23:35:41,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:35:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-13 23:35:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:35:41,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:41,689 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:41,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:35:41,689 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:41,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2020-10-13 23:35:41,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:41,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086206825] [2020-10-13 23:35:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:35:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:35:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:35:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:46,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:46,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:46,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:46,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:46,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:46,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:46,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:46,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:46,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 23:35:46,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086206825] [2020-10-13 23:35:46,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:46,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:35:46,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077353006] [2020-10-13 23:35:46,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:35:46,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:35:46,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:46,940 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 20 states. [2020-10-13 23:35:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:47,205 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2020-10-13 23:35:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:35:47,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-13 23:35:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:47,207 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:35:47,208 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:35:47,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:35:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-13 23:35:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:35:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-13 23:35:47,214 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2020-10-13 23:35:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:47,214 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-13 23:35:47,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:35:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-13 23:35:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:35:47,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:47,216 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:47,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:35:47,216 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2020-10-13 23:35:47,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:47,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133148813] [2020-10-13 23:35:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:35:52,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:52,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:52,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:52,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:52,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-13 23:35:52,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133148813] [2020-10-13 23:35:52,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:52,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:35:52,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213150504] [2020-10-13 23:35:52,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:35:52,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:35:52,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:52,544 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 21 states. [2020-10-13 23:35:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:52,843 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2020-10-13 23:35:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:35:52,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-13 23:35:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:52,845 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:35:52,845 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:35:52,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:35:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 23:35:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:35:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 23:35:52,852 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 102 [2020-10-13 23:35:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:52,852 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 23:35:52,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:35:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 23:35:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:35:52,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:52,854 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:52,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:35:52,854 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1112684590, now seen corresponding path program 18 times [2020-10-13 23:35:52,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:52,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142281086] [2020-10-13 23:35:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:35:58,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:35:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:58,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:58,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:58,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-13 23:35:58,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142281086] [2020-10-13 23:35:58,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:58,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:35:58,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895383950] [2020-10-13 23:35:58,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:35:58,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:35:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:35:58,296 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 22 states. [2020-10-13 23:35:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:58,567 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2020-10-13 23:35:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:35:58,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-13 23:35:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:58,569 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:35:58,569 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:35:58,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:35:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:35:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-13 23:35:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 23:35:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-13 23:35:58,576 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2020-10-13 23:35:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:58,576 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-13 23:35:58,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:35:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-13 23:35:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:35:58,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:58,578 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:58,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:35:58,578 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1010160530, now seen corresponding path program 19 times [2020-10-13 23:35:58,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:58,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523939977] [2020-10-13 23:35:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:03,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:03,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:36:03,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:36:03,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:03,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:03,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:03,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:03,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:03,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:03,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-13 23:36:03,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523939977] [2020-10-13 23:36:03,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:03,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:36:03,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929370995] [2020-10-13 23:36:03,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:36:03,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:36:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:03,972 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 23 states. [2020-10-13 23:36:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:04,290 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 23:36:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:36:04,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-13 23:36:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:04,292 INFO L225 Difference]: With dead ends: 215 [2020-10-13 23:36:04,292 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:36:04,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:36:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 23:36:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:36:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-13 23:36:04,300 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 112 [2020-10-13 23:36:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:04,300 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-13 23:36:04,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:36:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-13 23:36:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:36:04,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:04,302 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:04,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:36:04,302 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1884348982, now seen corresponding path program 20 times [2020-10-13 23:36:04,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:04,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034664473] [2020-10-13 23:36:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:04,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:09,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5541 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:36:09,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:36:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:10,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:10,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:10,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-13 23:36:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034664473] [2020-10-13 23:36:10,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:10,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:36:10,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122819805] [2020-10-13 23:36:10,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:36:10,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:36:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:10,165 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 24 states. [2020-10-13 23:36:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:10,481 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2020-10-13 23:36:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:36:10,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-13 23:36:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:10,486 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:36:10,486 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:36:10,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:36:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-13 23:36:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:36:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 23:36:10,492 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 117 [2020-10-13 23:36:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:10,493 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 23:36:10,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:36:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 23:36:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:36:10,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:10,494 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:10,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:36:10,495 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash -326920054, now seen corresponding path program 21 times [2020-10-13 23:36:10,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:10,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290604632] [2020-10-13 23:36:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:15,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:36:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:36:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:15,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:15,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-13 23:36:15,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290604632] [2020-10-13 23:36:15,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:15,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:36:15,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874097662] [2020-10-13 23:36:15,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:36:15,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:36:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:15,966 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 25 states. [2020-10-13 23:36:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:16,295 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2020-10-13 23:36:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:36:16,296 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-13 23:36:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:16,297 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:36:16,297 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:36:16,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:36:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-13 23:36:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 23:36:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-13 23:36:16,304 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 122 [2020-10-13 23:36:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:16,304 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-13 23:36:16,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:36:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-13 23:36:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 23:36:16,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:16,306 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:16,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:36:16,306 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1188305858, now seen corresponding path program 22 times [2020-10-13 23:36:16,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:16,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954519135] [2020-10-13 23:36:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:16,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:21,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5157 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:36:21,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-13 23:36:21,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954519135] [2020-10-13 23:36:21,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:21,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:36:21,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513306661] [2020-10-13 23:36:21,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:36:21,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:36:21,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:21,849 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 26 states. [2020-10-13 23:36:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:22,128 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-10-13 23:36:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:36:22,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-13 23:36:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:22,130 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:36:22,131 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:36:22,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:36:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 23:36:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:36:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-13 23:36:22,137 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2020-10-13 23:36:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:22,137 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-13 23:36:22,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:36:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-13 23:36:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 23:36:22,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:22,139 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:22,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:36:22,140 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1540310402, now seen corresponding path program 23 times [2020-10-13 23:36:22,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:22,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579442035] [2020-10-13 23:36:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:22,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:22,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:27,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:27,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 23:36:27,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:27,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:36:27,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:27,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:27,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:27,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:27,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-13 23:36:27,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579442035] [2020-10-13 23:36:27,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:27,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:36:27,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049211772] [2020-10-13 23:36:27,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:36:27,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:36:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:27,624 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 27 states. [2020-10-13 23:36:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:27,974 INFO L93 Difference]: Finished difference Result 251 states and 259 transitions. [2020-10-13 23:36:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:36:27,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-13 23:36:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:27,976 INFO L225 Difference]: With dead ends: 251 [2020-10-13 23:36:27,976 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:36:27,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:36:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 23:36:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:36:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 23:36:27,994 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 132 [2020-10-13 23:36:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:27,994 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 23:36:27,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:36:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 23:36:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:36:27,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:27,998 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:27,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:36:27,999 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:27,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1193492038, now seen corresponding path program 24 times [2020-10-13 23:36:27,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:28,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489362668] [2020-10-13 23:36:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:33,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:33,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:36:33,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-13 23:36:33,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:33,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:33,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:36:33,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:36:33,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:36:33,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:33,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:33,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:33,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:33,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-13 23:36:33,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489362668] [2020-10-13 23:36:33,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:33,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:36:33,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967861685] [2020-10-13 23:36:33,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:36:33,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:36:33,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:33,527 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 28 states. [2020-10-13 23:36:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:33,914 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 23:36:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:36:33,915 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-13 23:36:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:33,916 INFO L225 Difference]: With dead ends: 260 [2020-10-13 23:36:33,916 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:36:33,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:36:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-13 23:36:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 23:36:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-13 23:36:33,924 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 137 [2020-10-13 23:36:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:33,925 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-13 23:36:33,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:36:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-13 23:36:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 23:36:33,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:33,926 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:33,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:36:33,926 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash -418850182, now seen corresponding path program 25 times [2020-10-13 23:36:33,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:33,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172904004] [2020-10-13 23:36:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:36:39,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:36:39,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:36:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:39,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:39,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:39,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:39,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:39,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:39,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:39,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:39,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:39,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-13 23:36:39,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172904004] [2020-10-13 23:36:39,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:39,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:36:39,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951597176] [2020-10-13 23:36:39,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:36:39,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:39,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:36:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:39,472 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 29 states. [2020-10-13 23:36:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:39,783 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2020-10-13 23:36:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:36:39,784 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-13 23:36:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:39,785 INFO L225 Difference]: With dead ends: 269 [2020-10-13 23:36:39,785 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:36:39,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:36:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-13 23:36:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:36:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2020-10-13 23:36:39,793 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 142 [2020-10-13 23:36:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:39,794 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2020-10-13 23:36:39,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:36:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2020-10-13 23:36:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:36:39,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:39,795 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:39,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:36:39,796 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash -779546702, now seen corresponding path program 26 times [2020-10-13 23:36:39,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:39,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832884550] [2020-10-13 23:36:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:39,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:44,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:36:44,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:45,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:45,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:45,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:45,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:45,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:45,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:45,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:45,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:45,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-13 23:36:45,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832884550] [2020-10-13 23:36:45,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:45,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:36:45,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90271770] [2020-10-13 23:36:45,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:36:45,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:36:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:45,394 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 30 states. [2020-10-13 23:36:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:45,783 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2020-10-13 23:36:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:36:45,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-13 23:36:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:45,785 INFO L225 Difference]: With dead ends: 278 [2020-10-13 23:36:45,786 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:36:45,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:36:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-13 23:36:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:36:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 23:36:45,794 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2020-10-13 23:36:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 23:36:45,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:36:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 23:36:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:36:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:45,795 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:45,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:36:45,796 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash -987736206, now seen corresponding path program 27 times [2020-10-13 23:36:45,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:45,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999285220] [2020-10-13 23:36:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:45,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:51,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:36:51,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:36:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:51,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:51,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:51,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:51,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:51,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:51,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:51,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:51,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:51,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-13 23:36:51,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999285220] [2020-10-13 23:36:51,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:51,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:36:51,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060552367] [2020-10-13 23:36:51,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:36:51,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:36:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:51,673 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 31 states. [2020-10-13 23:36:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:52,205 INFO L93 Difference]: Finished difference Result 287 states and 295 transitions. [2020-10-13 23:36:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:36:52,206 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-13 23:36:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:52,208 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:36:52,208 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:36:52,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:36:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 23:36:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:36:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-10-13 23:36:52,220 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2020-10-13 23:36:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:52,221 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-10-13 23:36:52,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:36:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-10-13 23:36:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:36:52,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:52,223 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:52,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:36:52,224 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash 312018346, now seen corresponding path program 28 times [2020-10-13 23:36:52,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:52,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605368453] [2020-10-13 23:36:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:52,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:57,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:36:57,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:57,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:57,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:57,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:57,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:57,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:57,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:57,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:57,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:36:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 23:36:57,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605368453] [2020-10-13 23:36:57,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:57,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:36:57,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886873992] [2020-10-13 23:36:57,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:36:57,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:36:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:36:57,965 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 32 states. [2020-10-13 23:36:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:58,457 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-10-13 23:36:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:36:58,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-13 23:36:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:58,459 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:36:58,459 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:36:58,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:36:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:36:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-13 23:36:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 23:36:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2020-10-13 23:36:58,467 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 157 [2020-10-13 23:36:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:58,467 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2020-10-13 23:36:58,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:36:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2020-10-13 23:36:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 23:36:58,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:58,469 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:58,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:36:58,469 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2029667222, now seen corresponding path program 29 times [2020-10-13 23:36:58,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:58,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479615622] [2020-10-13 23:36:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:58,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:03,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:37:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:37:03,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:04,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:04,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:04,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:04,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:04,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:37:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-13 23:37:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479615622] [2020-10-13 23:37:04,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:04,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:37:04,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348543928] [2020-10-13 23:37:04,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:37:04,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:04,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:37:04,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:04,189 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand 33 states. [2020-10-13 23:37:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:04,539 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2020-10-13 23:37:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:37:04,539 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-13 23:37:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:04,541 INFO L225 Difference]: With dead ends: 305 [2020-10-13 23:37:04,541 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 23:37:04,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 23:37:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-13 23:37:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:37:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2020-10-13 23:37:04,548 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 162 [2020-10-13 23:37:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:04,548 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2020-10-13 23:37:04,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:37:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2020-10-13 23:37:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:37:04,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:04,549 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:04,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:37:04,550 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash 332178338, now seen corresponding path program 30 times [2020-10-13 23:37:04,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:04,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687690037] [2020-10-13 23:37:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:09,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:09,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:37:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:10,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:10,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:10,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:10,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:10,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-13 23:37:10,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687690037] [2020-10-13 23:37:10,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:10,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:37:10,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251010828] [2020-10-13 23:37:10,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:37:10,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:37:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:10,338 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 34 states. [2020-10-13 23:37:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:10,738 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2020-10-13 23:37:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:37:10,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-13 23:37:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:10,740 INFO L225 Difference]: With dead ends: 314 [2020-10-13 23:37:10,740 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:37:10,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:37:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-13 23:37:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 23:37:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-10-13 23:37:10,752 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2020-10-13 23:37:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:10,752 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-10-13 23:37:10,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:37:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-10-13 23:37:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 23:37:10,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:10,755 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:10,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:37:10,755 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1750529694, now seen corresponding path program 31 times [2020-10-13 23:37:10,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:10,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109078253] [2020-10-13 23:37:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:15,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:15,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 23:37:15,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:15,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:37:15,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:16,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:16,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:16,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-13 23:37:16,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109078253] [2020-10-13 23:37:16,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:16,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:37:16,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927487233] [2020-10-13 23:37:16,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:37:16,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:37:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:16,517 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 35 states. [2020-10-13 23:37:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:16,977 INFO L93 Difference]: Finished difference Result 323 states and 331 transitions. [2020-10-13 23:37:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:37:16,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-13 23:37:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:16,979 INFO L225 Difference]: With dead ends: 323 [2020-10-13 23:37:16,979 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 23:37:16,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 23:37:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-13 23:37:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 23:37:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2020-10-13 23:37:16,986 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 172 [2020-10-13 23:37:16,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:16,987 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2020-10-13 23:37:16,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:37:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2020-10-13 23:37:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 23:37:16,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:16,988 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:16,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:37:16,989 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash 48490906, now seen corresponding path program 32 times [2020-10-13 23:37:16,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:16,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335225620] [2020-10-13 23:37:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:22,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:22,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 23:37:22,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:37:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:22,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:22,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:22,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:22,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:22,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-13 23:37:22,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335225620] [2020-10-13 23:37:22,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:22,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:37:22,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340924817] [2020-10-13 23:37:22,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:37:22,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:37:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:22,872 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand 36 states. [2020-10-13 23:37:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:23,374 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2020-10-13 23:37:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:37:23,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-13 23:37:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:23,377 INFO L225 Difference]: With dead ends: 332 [2020-10-13 23:37:23,377 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 23:37:23,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 23:37:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-13 23:37:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:37:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2020-10-13 23:37:23,393 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 177 [2020-10-13 23:37:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:23,393 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2020-10-13 23:37:23,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:37:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2020-10-13 23:37:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 23:37:23,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:23,396 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:23,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:37:23,397 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1141227942, now seen corresponding path program 33 times [2020-10-13 23:37:23,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:23,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517672000] [2020-10-13 23:37:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:23,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:28,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:28,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 23:37:28,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:37:28,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:29,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:29,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:29,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:29,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:29,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-13 23:37:29,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517672000] [2020-10-13 23:37:29,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:29,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:37:29,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543981470] [2020-10-13 23:37:29,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:37:29,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:37:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:29,195 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 37 states. [2020-10-13 23:37:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:29,708 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2020-10-13 23:37:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:37:29,709 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-13 23:37:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:29,711 INFO L225 Difference]: With dead ends: 341 [2020-10-13 23:37:29,711 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 23:37:29,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 23:37:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-13 23:37:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 23:37:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2020-10-13 23:37:29,720 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 182 [2020-10-13 23:37:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:29,720 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2020-10-13 23:37:29,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:37:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2020-10-13 23:37:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 23:37:29,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:29,722 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:29,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:37:29,722 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash 597612434, now seen corresponding path program 34 times [2020-10-13 23:37:29,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:29,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854258392] [2020-10-13 23:37:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:34,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:37:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:37:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:37:34,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:35,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:35,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:35,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:35,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:35,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:35,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-13 23:37:35,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854258392] [2020-10-13 23:37:35,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:35,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:37:35,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504978564] [2020-10-13 23:37:35,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:37:35,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:37:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:35,651 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand 38 states. [2020-10-13 23:37:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:36,123 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2020-10-13 23:37:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:37:36,123 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-13 23:37:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:36,125 INFO L225 Difference]: With dead ends: 350 [2020-10-13 23:37:36,125 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:37:36,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:37:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-13 23:37:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 23:37:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2020-10-13 23:37:36,133 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 187 [2020-10-13 23:37:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:36,133 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2020-10-13 23:37:36,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:37:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2020-10-13 23:37:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 23:37:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:36,134 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:36,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:37:36,135 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1830200494, now seen corresponding path program 35 times [2020-10-13 23:37:36,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:36,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488719117] [2020-10-13 23:37:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:41,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:41,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:37:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:42,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:42,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:42,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:42,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:42,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:42,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:42,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:42,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:42,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:42,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:42,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-13 23:37:42,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488719117] [2020-10-13 23:37:42,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:42,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:37:42,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073577473] [2020-10-13 23:37:42,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:37:42,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:37:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:42,037 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 39 states. [2020-10-13 23:37:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:42,507 INFO L93 Difference]: Finished difference Result 359 states and 367 transitions. [2020-10-13 23:37:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:37:42,507 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-13 23:37:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:42,509 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:37:42,509 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 23:37:42,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 23:37:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-13 23:37:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:37:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2020-10-13 23:37:42,518 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 192 [2020-10-13 23:37:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:42,519 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2020-10-13 23:37:42,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:37:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2020-10-13 23:37:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:37:42,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:42,520 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:42,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:37:42,521 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1337814410, now seen corresponding path program 36 times [2020-10-13 23:37:42,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:42,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140856173] [2020-10-13 23:37:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:42,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:47,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:37:47,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:37:47,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:37:47,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:48,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:48,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:48,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:48,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-13 23:37:48,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140856173] [2020-10-13 23:37:48,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:48,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:37:48,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344205135] [2020-10-13 23:37:48,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:37:48,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:37:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:48,382 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand 40 states. [2020-10-13 23:37:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:48,954 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2020-10-13 23:37:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:37:48,954 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-13 23:37:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:48,956 INFO L225 Difference]: With dead ends: 368 [2020-10-13 23:37:48,956 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:37:48,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:37:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 23:37:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:37:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2020-10-13 23:37:48,965 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 197 [2020-10-13 23:37:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:48,965 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2020-10-13 23:37:48,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:37:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2020-10-13 23:37:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 23:37:48,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:48,967 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:48,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:37:48,967 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash 359030858, now seen corresponding path program 37 times [2020-10-13 23:37:48,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:48,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937298228] [2020-10-13 23:37:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:53,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:37:53,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:37:53,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:37:53,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:54,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:54,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:54,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:54,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-13 23:37:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937298228] [2020-10-13 23:37:54,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:54,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:37:54,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429092391] [2020-10-13 23:37:54,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:37:54,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:37:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:37:54,874 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand 41 states. [2020-10-13 23:37:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:55,372 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2020-10-13 23:37:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:37:55,372 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-13 23:37:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:55,374 INFO L225 Difference]: With dead ends: 377 [2020-10-13 23:37:55,374 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:37:55,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:37:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:37:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-13 23:37:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 23:37:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2020-10-13 23:37:55,381 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 202 [2020-10-13 23:37:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:55,382 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2020-10-13 23:37:55,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:37:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2020-10-13 23:37:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:37:55,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:55,383 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:55,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:37:55,383 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1996467074, now seen corresponding path program 38 times [2020-10-13 23:37:55,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:55,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38097407] [2020-10-13 23:37:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:55,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:00,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:00,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5346 [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:38:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:38:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:38:00,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:01,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:01,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:01,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:01,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-13 23:38:01,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38097407] [2020-10-13 23:38:01,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:01,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:38:01,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719350915] [2020-10-13 23:38:01,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:38:01,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:38:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:01,672 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand 42 states. [2020-10-13 23:38:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:02,128 INFO L93 Difference]: Finished difference Result 386 states and 394 transitions. [2020-10-13 23:38:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:38:02,129 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-13 23:38:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:02,131 INFO L225 Difference]: With dead ends: 386 [2020-10-13 23:38:02,131 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:38:02,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:38:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-13 23:38:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 23:38:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2020-10-13 23:38:02,139 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 207 [2020-10-13 23:38:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:02,140 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2020-10-13 23:38:02,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:38:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2020-10-13 23:38:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-13 23:38:02,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:02,141 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:02,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:38:02,142 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 375475522, now seen corresponding path program 39 times [2020-10-13 23:38:02,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:02,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175422397] [2020-10-13 23:38:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:02,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:07,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5353 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:38:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:08,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:08,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:08,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:08,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:08,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:08,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-13 23:38:08,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175422397] [2020-10-13 23:38:08,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:08,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:38:08,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650630638] [2020-10-13 23:38:08,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:38:08,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:38:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:08,501 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand 43 states. [2020-10-13 23:38:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:09,133 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-10-13 23:38:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:38:09,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 212 [2020-10-13 23:38:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:09,135 INFO L225 Difference]: With dead ends: 395 [2020-10-13 23:38:09,135 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 23:38:09,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 23:38:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-13 23:38:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 23:38:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2020-10-13 23:38:09,142 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 212 [2020-10-13 23:38:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:09,142 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2020-10-13 23:38:09,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:38:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2020-10-13 23:38:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 23:38:09,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:09,144 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:09,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:38:09,146 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash 522555770, now seen corresponding path program 40 times [2020-10-13 23:38:09,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:09,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566368762] [2020-10-13 23:38:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:09,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:09,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:14,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 23:38:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:38:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:14,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:38:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:38:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 23:38:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:15,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-13 23:38:15,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566368762] [2020-10-13 23:38:15,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:15,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:38:15,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355145121] [2020-10-13 23:38:15,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:38:15,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:38:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:15,228 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand 44 states. [2020-10-13 23:38:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:15,769 INFO L93 Difference]: Finished difference Result 404 states and 412 transitions. [2020-10-13 23:38:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:38:15,769 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 217 [2020-10-13 23:38:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:15,771 INFO L225 Difference]: With dead ends: 404 [2020-10-13 23:38:15,771 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 23:38:15,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 23:38:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-13 23:38:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 23:38:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2020-10-13 23:38:15,779 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 217 [2020-10-13 23:38:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:15,780 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2020-10-13 23:38:15,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:38:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2020-10-13 23:38:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-13 23:38:15,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:15,781 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:15,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:38:15,781 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1026940358, now seen corresponding path program 41 times [2020-10-13 23:38:15,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:15,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686260209] [2020-10-13 23:38:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:16,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:21,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:21,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 23:38:21,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5291 [2020-10-13 23:38:21,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:21,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:38:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 23:38:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:38:21,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:22,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:22,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:22,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:22,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-13 23:38:22,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686260209] [2020-10-13 23:38:22,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:22,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:38:22,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575014614] [2020-10-13 23:38:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:38:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:38:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:22,161 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand 45 states. [2020-10-13 23:38:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:22,763 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2020-10-13 23:38:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:38:22,763 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 222 [2020-10-13 23:38:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:22,765 INFO L225 Difference]: With dead ends: 413 [2020-10-13 23:38:22,765 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 23:38:22,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 23:38:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-13 23:38:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:38:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2020-10-13 23:38:22,773 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 222 [2020-10-13 23:38:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:22,774 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2020-10-13 23:38:22,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:38:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2020-10-13 23:38:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:38:22,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:22,776 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:22,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:38:22,776 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:22,776 INFO L82 PathProgramCache]: Analyzing trace with hash -470868110, now seen corresponding path program 42 times [2020-10-13 23:38:22,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:22,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488836871] [2020-10-13 23:38:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking...