/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:59:39,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:59:39,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:59:39,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:59:39,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:59:39,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:59:39,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:59:39,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:59:39,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:59:39,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:59:39,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:59:39,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:59:39,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:59:39,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:59:39,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:59:39,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:59:39,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:59:39,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:59:39,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:59:39,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:59:39,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:59:39,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:59:39,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:59:39,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:59:39,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:59:39,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:59:39,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:59:39,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:59:39,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:59:39,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:59:39,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:59:39,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:59:39,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:59:39,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:59:39,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:59:39,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:59:39,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:59:39,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:59:39,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:59:39,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:59:39,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:59:39,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:59:39,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:59:39,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:59:39,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:59:39,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:59:39,712 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:59:39,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:59:39,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:59:39,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:59:39,714 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:59:39,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:59:39,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:59:39,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:59:39,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:59:39,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:59:39,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:59:39,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:59:39,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:39,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:59:39,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:59:39,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:59:39,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:59:39,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:59:39,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:59:39,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:59:39,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:59:40,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:59:40,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:59:40,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:59:40,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:59:40,055 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:59:40,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-14 17:59:40,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f7a48a3/6b880f50eb674a5897abaf79ac28c9f9/FLAG7ea5ba564 [2020-10-14 17:59:40,641 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:59:40,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2020-10-14 17:59:40,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f7a48a3/6b880f50eb674a5897abaf79ac28c9f9/FLAG7ea5ba564 [2020-10-14 17:59:40,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73f7a48a3/6b880f50eb674a5897abaf79ac28c9f9 [2020-10-14 17:59:40,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:59:40,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:59:40,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:40,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:59:40,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:59:40,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:40" (1/1) ... [2020-10-14 17:59:40,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1003e016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:40, skipping insertion in model container [2020-10-14 17:59:40,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:40" (1/1) ... [2020-10-14 17:59:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:59:41,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:59:41,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:41,209 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:59:41,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:41,255 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:59:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41 WrapperNode [2020-10-14 17:59:41,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:41,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:59:41,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:59:41,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:59:41,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... [2020-10-14 17:59:41,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:59:41,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:59:41,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:59:41,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:59:41,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:59:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:59:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:59:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:59:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:59:41,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:59:41,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:59:41,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:59:41,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:59:41,730 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 17:59:41,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:41 BoogieIcfgContainer [2020-10-14 17:59:41,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:59:41,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:59:41,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:59:41,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:59:41,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:59:40" (1/3) ... [2020-10-14 17:59:41,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449ffee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:41, skipping insertion in model container [2020-10-14 17:59:41,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:41" (2/3) ... [2020-10-14 17:59:41,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449ffee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:41, skipping insertion in model container [2020-10-14 17:59:41,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:41" (3/3) ... [2020-10-14 17:59:41,743 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2020-10-14 17:59:41,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:59:41,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:59:41,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:59:41,833 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:59:41,833 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:59:41,833 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:59:41,833 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:59:41,834 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:59:41,834 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:59:41,834 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:59:41,834 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:59:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 17:59:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 17:59:41,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:41,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:41,866 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash -190793262, now seen corresponding path program 1 times [2020-10-14 17:59:41,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:41,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793612918] [2020-10-14 17:59:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:43,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 17:59:43,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:59:43,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1200 [2020-10-14 17:59:43,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:43,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:43,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 17:59:43,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:59:43,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:59:43,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:43,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:43,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:43,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:43,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:43,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:43,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:59:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:59:43,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793612918] [2020-10-14 17:59:43,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:59:43,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:59:43,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120514228] [2020-10-14 17:59:43,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:59:43,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:59:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:59:43,322 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-10-14 17:59:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:43,519 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2020-10-14 17:59:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:59:43,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-14 17:59:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:43,531 INFO L225 Difference]: With dead ends: 70 [2020-10-14 17:59:43,531 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 17:59:43,535 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 [2020-10-14 17:59:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 17:59:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 17:59:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 17:59:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-14 17:59:43,581 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-14 17:59:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:43,582 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-14 17:59:43,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:59:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-14 17:59:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:59:43,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:43,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:43,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:59:43,584 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1635964633, now seen corresponding path program 1 times [2020-10-14 17:59:43,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:43,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317448342] [2020-10-14 17:59:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:48,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:59:48,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:59:48,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:59:48,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:48,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:59:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 17:59:48,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 17:59:48,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 17:59:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:48,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:48,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:48,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:48,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:59:48,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317448342] [2020-10-14 17:59:48,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:48,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:59:48,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861494312] [2020-10-14 17:59:48,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:59:48,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:59:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:59:48,661 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2020-10-14 17:59:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:48,795 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2020-10-14 17:59:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:59:48,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-14 17:59:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:48,797 INFO L225 Difference]: With dead ends: 73 [2020-10-14 17:59:48,797 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 17:59:48,799 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 [2020-10-14 17:59:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 17:59:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-14 17:59:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 17:59:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-14 17:59:48,809 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2020-10-14 17:59:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:48,810 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-14 17:59:48,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:59:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-14 17:59:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:59:48,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:48,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:48,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:59:48,812 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1768739882, now seen corresponding path program 2 times [2020-10-14 17:59:48,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:48,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302083473] [2020-10-14 17:59:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:48,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:50,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:53,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:59:53,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:59:53,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:59:53,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:53,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:53,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:59:53,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:59:53,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:59:53,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:53,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:53,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:53,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:53,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:53,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:53,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:53,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:53,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:53,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:53,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 17:59:53,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302083473] [2020-10-14 17:59:53,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:53,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:59:53,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824039286] [2020-10-14 17:59:53,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:59:53,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:59:53,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:59:53,894 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-10-14 17:59:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:54,048 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-10-14 17:59:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:59:54,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-14 17:59:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:54,050 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:59:54,050 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 17:59:54,051 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 [2020-10-14 17:59:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 17:59:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 17:59:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 17:59:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-14 17:59:54,061 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2020-10-14 17:59:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:54,061 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-14 17:59:54,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:59:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-14 17:59:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:59:54,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:54,063 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:54,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:59:54,063 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1394041657, now seen corresponding path program 3 times [2020-10-14 17:59:54,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:54,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753799523] [2020-10-14 17:59:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:54,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:59:59,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:59,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:59:59,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:59:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 17:59:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 17:59:59,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:59,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:59,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:59,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:59,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:59,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:59,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:59,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 17:59:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:59:59,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753799523] [2020-10-14 17:59:59,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:59,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:59:59,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049854354] [2020-10-14 17:59:59,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:59:59,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:59:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:59:59,159 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2020-10-14 17:59:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:59,329 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2020-10-14 17:59:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:59:59,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-14 17:59:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:59,331 INFO L225 Difference]: With dead ends: 99 [2020-10-14 17:59:59,331 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 17:59:59,332 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 [2020-10-14 17:59:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 17:59:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 17:59:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:59:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-14 17:59:59,341 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 46 [2020-10-14 17:59:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:59,341 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-14 17:59:59,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:59:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-14 17:59:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:59:59,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:59,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:59,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:59:59,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1002468982, now seen corresponding path program 4 times [2020-10-14 17:59:59,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:59,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691491134] [2020-10-14 17:59:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:59,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:00,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:04,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:00:04,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:00:04,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:04,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:00:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:00:04,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:04,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:04,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:04,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:04,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:04,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:04,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:04,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:04,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-14 18:00:04,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691491134] [2020-10-14 18:00:04,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:04,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:00:04,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265304070] [2020-10-14 18:00:04,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:00:04,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:00:04,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:00:04,432 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2020-10-14 18:00:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:04,601 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-14 18:00:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:00:04,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-14 18:00:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:04,602 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:00:04,602 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 18:00:04,603 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 [2020-10-14 18:00:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 18:00:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 18:00:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:00:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-14 18:00:04,612 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2020-10-14 18:00:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:04,612 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-14 18:00:04,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:00:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-14 18:00:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:00:04,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:04,613 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:04,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:00:04,614 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash 451754087, now seen corresponding path program 5 times [2020-10-14 18:00:04,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:04,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020819210] [2020-10-14 18:00:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:04,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:09,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:09,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:00:09,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:09,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:00:09,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:09,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:09,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:00:09,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 18:00:09,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:00:09,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 18:00:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:09,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:00:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:09,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:09,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 18:00:09,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020819210] [2020-10-14 18:00:09,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:09,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:00:09,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607275486] [2020-10-14 18:00:09,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:00:09,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:00:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:00:09,788 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-10-14 18:00:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:10,010 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-10-14 18:00:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:00:10,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-14 18:00:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:10,012 INFO L225 Difference]: With dead ends: 125 [2020-10-14 18:00:10,012 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:00:10,013 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 [2020-10-14 18:00:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:00:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-14 18:00:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 18:00:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-14 18:00:10,028 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 60 [2020-10-14 18:00:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:10,028 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-14 18:00:10,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:00:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-14 18:00:10,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 18:00:10,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:10,030 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:10,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:00:10,032 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash 757831402, now seen corresponding path program 6 times [2020-10-14 18:00:10,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:10,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620413636] [2020-10-14 18:00:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:14,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:15,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:00:15,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:15,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:00:15,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:15,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:00:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 18:00:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:00:15,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:15,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:15,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:15,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:15,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:15,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:15,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:15,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:15,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:00:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-14 18:00:15,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620413636] [2020-10-14 18:00:15,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:15,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:00:15,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988149373] [2020-10-14 18:00:15,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:00:15,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:00:15,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:00:15,183 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 10 states. [2020-10-14 18:00:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:15,396 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-14 18:00:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:00:15,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-14 18:00:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:15,397 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:00:15,397 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 18:00:15,398 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 [2020-10-14 18:00:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 18:00:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-14 18:00:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:00:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-14 18:00:15,415 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 67 [2020-10-14 18:00:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:15,415 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-14 18:00:15,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:00:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-14 18:00:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:00:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:15,421 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:15,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:00:15,422 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:15,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1686307833, now seen corresponding path program 7 times [2020-10-14 18:00:15,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:15,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206633980] [2020-10-14 18:00:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:15,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:20,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:20,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:00:20,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:20,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:00:20,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:00:20,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:20,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:20,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:20,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:20,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:20,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:20,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:20,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:20,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:20,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-14 18:00:20,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206633980] [2020-10-14 18:00:20,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:20,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:00:20,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645963436] [2020-10-14 18:00:20,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:00:20,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:00:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:00:20,577 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 11 states. [2020-10-14 18:00:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:20,813 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2020-10-14 18:00:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:00:20,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-14 18:00:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:20,815 INFO L225 Difference]: With dead ends: 151 [2020-10-14 18:00:20,815 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:00:20,817 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 [2020-10-14 18:00:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:00:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-14 18:00:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 18:00:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-14 18:00:20,825 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 74 [2020-10-14 18:00:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:20,826 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-14 18:00:20,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:00:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-14 18:00:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:00:20,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:20,827 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:20,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:00:20,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash 494861386, now seen corresponding path program 8 times [2020-10-14 18:00:20,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:20,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387820276] [2020-10-14 18:00:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:20,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:25,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:00:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 18:00:25,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:00:25,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:25,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:25,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:25,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:25,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:25,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:25,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:25,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-14 18:00:25,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387820276] [2020-10-14 18:00:25,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:25,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:00:25,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372703991] [2020-10-14 18:00:25,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:00:25,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:00:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:00:25,972 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2020-10-14 18:00:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:26,205 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2020-10-14 18:00:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:00:26,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-14 18:00:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:26,206 INFO L225 Difference]: With dead ends: 164 [2020-10-14 18:00:26,206 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 18:00:26,207 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 [2020-10-14 18:00:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 18:00:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-14 18:00:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:00:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-14 18:00:26,216 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 81 [2020-10-14 18:00:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:26,216 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-14 18:00:26,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:00:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-14 18:00:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 18:00:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:26,218 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:26,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:00:26,225 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash -938874969, now seen corresponding path program 9 times [2020-10-14 18:00:26,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:26,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523352759] [2020-10-14 18:00:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:26,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:26,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:31,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 18:00:31,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:31,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:31,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:00:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 18:00:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:00:31,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:31,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:31,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:31,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:31,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:31,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 18:00:31,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523352759] [2020-10-14 18:00:31,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:31,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:00:31,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769622607] [2020-10-14 18:00:31,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:00:31,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:00:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:00:31,377 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 13 states. [2020-10-14 18:00:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:31,687 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2020-10-14 18:00:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:00:31,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-14 18:00:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:31,689 INFO L225 Difference]: With dead ends: 177 [2020-10-14 18:00:31,689 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:00:31,691 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 [2020-10-14 18:00:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:00:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-14 18:00:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 18:00:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-14 18:00:31,719 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 88 [2020-10-14 18:00:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:31,719 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-14 18:00:31,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:00:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-14 18:00:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 18:00:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:31,723 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:31,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:00:31,724 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1207453270, now seen corresponding path program 10 times [2020-10-14 18:00:31,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:31,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398491645] [2020-10-14 18:00:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:36,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 18:00:36,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:36,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:00:36,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:36,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:36,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:36,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:36,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:36,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:36,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:36,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:36,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:00:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-14 18:00:36,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398491645] [2020-10-14 18:00:36,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:36,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:00:36,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409815015] [2020-10-14 18:00:36,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:00:36,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:36,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:00:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:00:36,939 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2020-10-14 18:00:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:37,199 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2020-10-14 18:00:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:00:37,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2020-10-14 18:00:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:37,201 INFO L225 Difference]: With dead ends: 190 [2020-10-14 18:00:37,201 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 18:00:37,202 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 [2020-10-14 18:00:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 18:00:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 18:00:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:00:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-14 18:00:37,215 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 95 [2020-10-14 18:00:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:37,216 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-14 18:00:37,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:00:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-14 18:00:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 18:00:37,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:37,221 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:37,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:00:37,221 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1082522439, now seen corresponding path program 11 times [2020-10-14 18:00:37,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:37,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398822993] [2020-10-14 18:00:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:37,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:42,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 18:00:42,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:42,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:00:42,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:42,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:00:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 18:00:42,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 18:00:42,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:42,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:42,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:42,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:42,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:42,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-14 18:00:42,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398822993] [2020-10-14 18:00:42,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:42,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:00:42,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611380892] [2020-10-14 18:00:42,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:00:42,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:00:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:00:42,404 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 15 states. [2020-10-14 18:00:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:42,735 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2020-10-14 18:00:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:00:42,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-14 18:00:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:42,743 INFO L225 Difference]: With dead ends: 203 [2020-10-14 18:00:42,743 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:00:42,744 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 [2020-10-14 18:00:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:00:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-14 18:00:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 18:00:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-10-14 18:00:42,753 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 102 [2020-10-14 18:00:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:42,753 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-10-14 18:00:42,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:00:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-10-14 18:00:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 18:00:42,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:42,755 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:42,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:00:42,755 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1458319606, now seen corresponding path program 12 times [2020-10-14 18:00:42,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:42,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576594798] [2020-10-14 18:00:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:43,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:47,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:00:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 18:00:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:00:47,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:47,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:47,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:47,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:47,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-14 18:00:47,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576594798] [2020-10-14 18:00:47,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:47,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:00:47,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851301313] [2020-10-14 18:00:47,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:00:47,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:00:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:00:47,949 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 16 states. [2020-10-14 18:00:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:48,245 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2020-10-14 18:00:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:00:48,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-10-14 18:00:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:48,247 INFO L225 Difference]: With dead ends: 216 [2020-10-14 18:00:48,247 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 18:00:48,248 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 [2020-10-14 18:00:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 18:00:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-14 18:00:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:00:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-10-14 18:00:48,256 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 109 [2020-10-14 18:00:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:48,256 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-10-14 18:00:48,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:00:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-10-14 18:00:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 18:00:48,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:48,258 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:48,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:00:48,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash -882690329, now seen corresponding path program 13 times [2020-10-14 18:00:48,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:48,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113002771] [2020-10-14 18:00:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:48,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:53,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:53,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 18:00:53,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:00:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:53,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:53,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-14 18:00:53,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113002771] [2020-10-14 18:00:53,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:53,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:00:53,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201744292] [2020-10-14 18:00:53,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:00:53,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:00:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:00:53,475 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 17 states. [2020-10-14 18:00:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:53,826 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2020-10-14 18:00:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:00:53,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2020-10-14 18:00:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:53,828 INFO L225 Difference]: With dead ends: 229 [2020-10-14 18:00:53,828 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 18:00:53,829 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 [2020-10-14 18:00:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 18:00:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-14 18:00:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 18:00:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2020-10-14 18:00:53,837 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 116 [2020-10-14 18:00:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:53,837 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2020-10-14 18:00:53,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:00:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2020-10-14 18:00:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 18:00:53,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:53,839 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:53,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:00:53,839 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 108084330, now seen corresponding path program 14 times [2020-10-14 18:00:53,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:53,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796353229] [2020-10-14 18:00:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:53,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:58,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 18:00:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:00:58,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:59,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:59,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-14 18:00:59,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796353229] [2020-10-14 18:00:59,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:59,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:00:59,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132656117] [2020-10-14 18:00:59,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:00:59,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:00:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:00:59,067 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 18 states. [2020-10-14 18:00:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:59,431 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2020-10-14 18:00:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:00:59,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 123 [2020-10-14 18:00:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:59,433 INFO L225 Difference]: With dead ends: 242 [2020-10-14 18:00:59,433 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 18:00:59,435 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 [2020-10-14 18:00:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 18:00:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-14 18:00:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 18:00:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2020-10-14 18:00:59,444 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 123 [2020-10-14 18:00:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:59,444 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2020-10-14 18:00:59,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:00:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2020-10-14 18:00:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 18:00:59,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:59,446 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:59,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:00:59,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1972607623, now seen corresponding path program 15 times [2020-10-14 18:00:59,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:59,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826666539] [2020-10-14 18:00:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:04,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:01:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 18:01:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:01:04,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:04,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:04,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:04,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-14 18:01:04,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826666539] [2020-10-14 18:01:04,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:04,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:01:04,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719972850] [2020-10-14 18:01:04,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:01:04,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:04,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:01:04,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:01:04,684 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 19 states. [2020-10-14 18:01:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:05,069 INFO L93 Difference]: Finished difference Result 255 states and 275 transitions. [2020-10-14 18:01:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:01:05,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2020-10-14 18:01:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:05,072 INFO L225 Difference]: With dead ends: 255 [2020-10-14 18:01:05,072 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 18:01:05,073 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 [2020-10-14 18:01:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 18:01:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-14 18:01:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 18:01:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-10-14 18:01:05,081 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 130 [2020-10-14 18:01:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:05,081 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-10-14 18:01:05,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:01:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-10-14 18:01:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 18:01:05,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:05,083 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:05,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:01:05,083 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 795738570, now seen corresponding path program 16 times [2020-10-14 18:01:05,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:05,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872793777] [2020-10-14 18:01:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:10,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 18:01:10,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:10,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 18:01:10,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:10,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:10,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:01:10,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:10,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:01:10,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:10,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:10,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:10,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:10,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-14 18:01:10,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872793777] [2020-10-14 18:01:10,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:10,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:01:10,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722447834] [2020-10-14 18:01:10,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:01:10,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:01:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:01:10,359 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 20 states. [2020-10-14 18:01:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:10,758 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2020-10-14 18:01:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:01:10,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-14 18:01:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:10,761 INFO L225 Difference]: With dead ends: 268 [2020-10-14 18:01:10,761 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 18:01:10,762 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 [2020-10-14 18:01:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 18:01:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-14 18:01:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 18:01:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2020-10-14 18:01:10,769 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 137 [2020-10-14 18:01:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:10,770 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2020-10-14 18:01:10,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:01:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2020-10-14 18:01:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 18:01:10,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:10,771 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:10,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:01:10,771 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1299634649, now seen corresponding path program 17 times [2020-10-14 18:01:10,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:10,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072169079] [2020-10-14 18:01:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:15,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:15,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 18:01:15,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:15,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 18:01:15,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:15,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:15,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:01:15,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:01:15,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:01:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:16,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:16,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:16,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:16,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:16,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:16,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:16,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:16,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:16,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-14 18:01:16,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072169079] [2020-10-14 18:01:16,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:16,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:01:16,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210825201] [2020-10-14 18:01:16,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:01:16,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:01:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:01:16,088 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand 21 states. [2020-10-14 18:01:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:16,505 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2020-10-14 18:01:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:01:16,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-10-14 18:01:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:16,507 INFO L225 Difference]: With dead ends: 281 [2020-10-14 18:01:16,507 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 18:01:16,508 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 [2020-10-14 18:01:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 18:01:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-14 18:01:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 18:01:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2020-10-14 18:01:16,520 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 144 [2020-10-14 18:01:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:16,520 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2020-10-14 18:01:16,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:01:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2020-10-14 18:01:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 18:01:16,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:16,522 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:16,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:01:16,522 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1395122390, now seen corresponding path program 18 times [2020-10-14 18:01:16,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:16,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139198114] [2020-10-14 18:01:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:16,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:21,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:21,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:01:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:21,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:21,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:21,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-14 18:01:21,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139198114] [2020-10-14 18:01:21,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:21,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:01:21,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356052435] [2020-10-14 18:01:21,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:01:21,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:01:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:01:21,847 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 22 states. [2020-10-14 18:01:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:22,282 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2020-10-14 18:01:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:01:22,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 151 [2020-10-14 18:01:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:22,284 INFO L225 Difference]: With dead ends: 294 [2020-10-14 18:01:22,284 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 18:01:22,285 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 [2020-10-14 18:01:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 18:01:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-14 18:01:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 18:01:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2020-10-14 18:01:22,292 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 151 [2020-10-14 18:01:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:22,292 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2020-10-14 18:01:22,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:01:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2020-10-14 18:01:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 18:01:22,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:22,294 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:22,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:01:22,294 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2083903943, now seen corresponding path program 19 times [2020-10-14 18:01:22,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:22,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310643384] [2020-10-14 18:01:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:22,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:27,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 18:01:27,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:01:27,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:27,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:27,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:01:27,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-14 18:01:27,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:01:27,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:27,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:27,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:27,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:27,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:27,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:27,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:27,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:27,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:27,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-14 18:01:27,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310643384] [2020-10-14 18:01:27,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:27,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:01:27,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380684333] [2020-10-14 18:01:27,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:01:27,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:01:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:01:27,668 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand 23 states. [2020-10-14 18:01:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:28,100 INFO L93 Difference]: Finished difference Result 307 states and 327 transitions. [2020-10-14 18:01:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:01:28,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2020-10-14 18:01:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:28,103 INFO L225 Difference]: With dead ends: 307 [2020-10-14 18:01:28,103 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 18:01:28,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:01:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 18:01:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-14 18:01:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-14 18:01:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2020-10-14 18:01:28,112 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 158 [2020-10-14 18:01:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:28,113 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2020-10-14 18:01:28,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:01:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2020-10-14 18:01:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 18:01:28,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:28,114 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:28,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:01:28,114 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 285054090, now seen corresponding path program 20 times [2020-10-14 18:01:28,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:28,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982172768] [2020-10-14 18:01:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:28,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:33,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:01:33,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:33,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:33,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:33,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:33,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:33,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:33,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:33,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:33,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-14 18:01:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982172768] [2020-10-14 18:01:33,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:33,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:01:33,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812283316] [2020-10-14 18:01:33,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:01:33,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:01:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:01:33,483 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 24 states. [2020-10-14 18:01:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:33,965 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2020-10-14 18:01:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:01:33,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2020-10-14 18:01:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:33,967 INFO L225 Difference]: With dead ends: 320 [2020-10-14 18:01:33,967 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 18:01:33,968 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 [2020-10-14 18:01:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 18:01:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-14 18:01:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 18:01:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2020-10-14 18:01:33,974 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 165 [2020-10-14 18:01:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:33,975 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2020-10-14 18:01:33,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:01:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2020-10-14 18:01:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-14 18:01:33,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:33,976 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:33,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:01:33,977 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1930147175, now seen corresponding path program 21 times [2020-10-14 18:01:33,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:33,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78118177] [2020-10-14 18:01:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:39,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:39,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-14 18:01:39,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:39,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:01:39,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:39,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:39,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:39,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:39,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-14 18:01:39,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78118177] [2020-10-14 18:01:39,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:39,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:01:39,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308378907] [2020-10-14 18:01:39,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:01:39,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:39,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:01:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:01:39,422 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand 25 states. [2020-10-14 18:01:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:39,845 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2020-10-14 18:01:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:01:39,848 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 172 [2020-10-14 18:01:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:39,849 INFO L225 Difference]: With dead ends: 333 [2020-10-14 18:01:39,849 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 18:01:39,850 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 [2020-10-14 18:01:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 18:01:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-14 18:01:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 18:01:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2020-10-14 18:01:39,859 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 172 [2020-10-14 18:01:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:39,859 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2020-10-14 18:01:39,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:01:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2020-10-14 18:01:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-14 18:01:39,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:39,860 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:39,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:01:39,861 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash -676568598, now seen corresponding path program 22 times [2020-10-14 18:01:39,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:39,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000531372] [2020-10-14 18:01:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:39,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:44,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:01:44,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-14 18:01:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:01:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:45,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:45,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:45,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:45,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:45,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-14 18:01:45,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000531372] [2020-10-14 18:01:45,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:45,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:01:45,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602367611] [2020-10-14 18:01:45,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:01:45,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:01:45,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:01:45,322 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand 26 states. [2020-10-14 18:01:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:45,977 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2020-10-14 18:01:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:01:45,977 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2020-10-14 18:01:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:45,979 INFO L225 Difference]: With dead ends: 346 [2020-10-14 18:01:45,979 INFO L226 Difference]: Without dead ends: 191 [2020-10-14 18:01:45,980 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 [2020-10-14 18:01:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-14 18:01:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-14 18:01:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-14 18:01:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 198 transitions. [2020-10-14 18:01:45,992 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 198 transitions. Word has length 179 [2020-10-14 18:01:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:45,993 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 198 transitions. [2020-10-14 18:01:45,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:01:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 198 transitions. [2020-10-14 18:01:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-14 18:01:45,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:45,995 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:45,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:01:45,996 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash -33769209, now seen corresponding path program 23 times [2020-10-14 18:01:45,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:45,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414550818] [2020-10-14 18:01:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:51,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:51,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-14 18:01:51,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:01:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:51,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:51,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:51,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-14 18:01:51,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414550818] [2020-10-14 18:01:51,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:51,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:01:51,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970218034] [2020-10-14 18:01:51,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:01:51,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:01:51,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:01:51,504 INFO L87 Difference]: Start difference. First operand 191 states and 198 transitions. Second operand 27 states. [2020-10-14 18:01:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:52,041 INFO L93 Difference]: Finished difference Result 359 states and 379 transitions. [2020-10-14 18:01:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:01:52,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 186 [2020-10-14 18:01:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:52,043 INFO L225 Difference]: With dead ends: 359 [2020-10-14 18:01:52,043 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 18:01:52,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:01:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 18:01:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-14 18:01:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-14 18:01:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2020-10-14 18:01:52,052 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 186 [2020-10-14 18:01:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:52,052 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2020-10-14 18:01:52,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:01:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2020-10-14 18:01:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 18:01:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:52,054 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:52,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:01:52,054 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1177716554, now seen corresponding path program 24 times [2020-10-14 18:01:52,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:52,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286088487] [2020-10-14 18:01:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:52,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-14 18:01:57,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:01:57,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:57,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:57,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:57,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-14 18:01:57,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286088487] [2020-10-14 18:01:57,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:57,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:01:57,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640697303] [2020-10-14 18:01:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:01:57,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:01:57,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:57,743 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand 28 states. [2020-10-14 18:01:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:58,225 INFO L93 Difference]: Finished difference Result 372 states and 392 transitions. [2020-10-14 18:01:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:01:58,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 193 [2020-10-14 18:01:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:58,227 INFO L225 Difference]: With dead ends: 372 [2020-10-14 18:01:58,227 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 18:01:58,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 18:01:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-14 18:01:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 18:01:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2020-10-14 18:01:58,235 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 193 [2020-10-14 18:01:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:58,235 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2020-10-14 18:01:58,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:01:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2020-10-14 18:01:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-14 18:01:58,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:58,237 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:58,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:01:58,238 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1786438823, now seen corresponding path program 25 times [2020-10-14 18:01:58,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:58,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616156443] [2020-10-14 18:01:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:58,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:03,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-14 18:02:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 18:02:03,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:03,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:02:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-14 18:02:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:02:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:03,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:03,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:03,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:03,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:03,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:03,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:03,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:03,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:03,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:02:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-14 18:02:04,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616156443] [2020-10-14 18:02:04,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:04,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:02:04,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144250936] [2020-10-14 18:02:04,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:02:04,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:02:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:02:04,004 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand 29 states. [2020-10-14 18:02:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:04,552 INFO L93 Difference]: Finished difference Result 385 states and 405 transitions. [2020-10-14 18:02:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:02:04,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 200 [2020-10-14 18:02:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:04,554 INFO L225 Difference]: With dead ends: 385 [2020-10-14 18:02:04,555 INFO L226 Difference]: Without dead ends: 212 [2020-10-14 18:02:04,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:02:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-14 18:02:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-10-14 18:02:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 18:02:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2020-10-14 18:02:04,565 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 200 [2020-10-14 18:02:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:04,565 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2020-10-14 18:02:04,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:02:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2020-10-14 18:02:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-14 18:02:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:04,567 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:04,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:02:04,567 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1264452778, now seen corresponding path program 26 times [2020-10-14 18:02:04,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:04,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098545705] [2020-10-14 18:02:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:04,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:04,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:04,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:09,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:02:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:02:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:10,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:10,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:10,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:10,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-14 18:02:10,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098545705] [2020-10-14 18:02:10,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:10,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:02:10,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144239617] [2020-10-14 18:02:10,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:02:10,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:02:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:10,202 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand 30 states. [2020-10-14 18:02:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:10,847 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2020-10-14 18:02:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:02:10,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 207 [2020-10-14 18:02:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:10,850 INFO L225 Difference]: With dead ends: 398 [2020-10-14 18:02:10,851 INFO L226 Difference]: Without dead ends: 219 [2020-10-14 18:02:10,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-14 18:02:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-10-14 18:02:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 18:02:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 226 transitions. [2020-10-14 18:02:10,865 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 226 transitions. Word has length 207 [2020-10-14 18:02:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 226 transitions. [2020-10-14 18:02:10,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:02:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 226 transitions. [2020-10-14 18:02:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-14 18:02:10,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:10,868 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:10,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:02:10,869 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:10,871 INFO L82 PathProgramCache]: Analyzing trace with hash 209205319, now seen corresponding path program 27 times [2020-10-14 18:02:10,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:10,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628646619] [2020-10-14 18:02:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:10,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:15,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:15,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-14 18:02:15,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:15,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 18:02:15,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:15,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:02:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-14 18:02:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:02:15,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:16,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:16,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:16,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:16,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:16,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-14 18:02:16,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628646619] [2020-10-14 18:02:16,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:16,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:02:16,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531378872] [2020-10-14 18:02:16,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:02:16,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:02:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:02:16,540 INFO L87 Difference]: Start difference. First operand 219 states and 226 transitions. Second operand 31 states. [2020-10-14 18:02:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:17,158 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2020-10-14 18:02:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:02:17,159 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 214 [2020-10-14 18:02:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:17,161 INFO L225 Difference]: With dead ends: 411 [2020-10-14 18:02:17,161 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 18:02:17,162 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 [2020-10-14 18:02:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 18:02:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-14 18:02:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 18:02:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2020-10-14 18:02:17,170 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 214 [2020-10-14 18:02:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:17,170 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2020-10-14 18:02:17,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:02:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2020-10-14 18:02:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-14 18:02:17,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:17,172 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:17,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:02:17,172 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1602017802, now seen corresponding path program 28 times [2020-10-14 18:02:17,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:17,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614480913] [2020-10-14 18:02:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:19,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:22,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-14 18:02:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:02:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:22,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:22,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:22,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:22,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:22,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-14 18:02:22,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614480913] [2020-10-14 18:02:22,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:22,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:02:22,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040557976] [2020-10-14 18:02:22,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:02:22,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:22,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:02:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:02:22,859 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand 32 states. [2020-10-14 18:02:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:23,413 INFO L93 Difference]: Finished difference Result 424 states and 444 transitions. [2020-10-14 18:02:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:02:23,414 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 221 [2020-10-14 18:02:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:23,416 INFO L225 Difference]: With dead ends: 424 [2020-10-14 18:02:23,416 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 18:02:23,417 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 [2020-10-14 18:02:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 18:02:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2020-10-14 18:02:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 18:02:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 240 transitions. [2020-10-14 18:02:23,424 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 240 transitions. Word has length 221 [2020-10-14 18:02:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:23,425 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 240 transitions. [2020-10-14 18:02:23,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:02:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 240 transitions. [2020-10-14 18:02:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-14 18:02:23,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:23,427 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:23,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:02:23,427 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1583789031, now seen corresponding path program 29 times [2020-10-14 18:02:23,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:23,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515827265] [2020-10-14 18:02:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:23,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:25,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:28,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:28,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-14 18:02:28,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:02:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:29,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:29,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:29,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-14 18:02:29,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515827265] [2020-10-14 18:02:29,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:29,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:02:29,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941719064] [2020-10-14 18:02:29,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:02:29,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:29,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:02:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:02:29,093 INFO L87 Difference]: Start difference. First operand 233 states and 240 transitions. Second operand 33 states. [2020-10-14 18:02:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:29,718 INFO L93 Difference]: Finished difference Result 437 states and 457 transitions. [2020-10-14 18:02:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:02:29,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 228 [2020-10-14 18:02:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:29,720 INFO L225 Difference]: With dead ends: 437 [2020-10-14 18:02:29,721 INFO L226 Difference]: Without dead ends: 240 [2020-10-14 18:02:29,722 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 [2020-10-14 18:02:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-14 18:02:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-14 18:02:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-14 18:02:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2020-10-14 18:02:29,730 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 228 [2020-10-14 18:02:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:29,730 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2020-10-14 18:02:29,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:02:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2020-10-14 18:02:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-14 18:02:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:29,732 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:29,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:02:29,732 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1683818346, now seen corresponding path program 30 times [2020-10-14 18:02:29,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:29,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057615722] [2020-10-14 18:02:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:29,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:29,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:30,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:31,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:34,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:34,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-14 18:02:34,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:34,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:02:34,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:35,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:35,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:35,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-14 18:02:35,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057615722] [2020-10-14 18:02:35,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:35,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:02:35,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912790002] [2020-10-14 18:02:35,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:02:35,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:02:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:35,494 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand 34 states. [2020-10-14 18:02:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:36,187 INFO L93 Difference]: Finished difference Result 450 states and 470 transitions. [2020-10-14 18:02:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:02:36,188 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 235 [2020-10-14 18:02:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:36,190 INFO L225 Difference]: With dead ends: 450 [2020-10-14 18:02:36,190 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 18:02:36,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:36,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 18:02:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-10-14 18:02:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-14 18:02:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 254 transitions. [2020-10-14 18:02:36,198 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 254 transitions. Word has length 235 [2020-10-14 18:02:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:36,198 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 254 transitions. [2020-10-14 18:02:36,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:02:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 254 transitions. [2020-10-14 18:02:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-14 18:02:36,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:36,200 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:36,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:02:36,201 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 557340551, now seen corresponding path program 31 times [2020-10-14 18:02:36,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:36,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722734540] [2020-10-14 18:02:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:36,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:38,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:41,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:02:41,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:41,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:02:41,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:41,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:41,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:41,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:41,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:41,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-14 18:02:41,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722734540] [2020-10-14 18:02:41,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:41,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:02:41,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177995836] [2020-10-14 18:02:41,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:02:41,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:41,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:02:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:41,943 INFO L87 Difference]: Start difference. First operand 247 states and 254 transitions. Second operand 35 states. [2020-10-14 18:02:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:42,582 INFO L93 Difference]: Finished difference Result 463 states and 483 transitions. [2020-10-14 18:02:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:02:42,582 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 242 [2020-10-14 18:02:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:42,585 INFO L225 Difference]: With dead ends: 463 [2020-10-14 18:02:42,585 INFO L226 Difference]: Without dead ends: 254 [2020-10-14 18:02:42,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-14 18:02:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2020-10-14 18:02:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-14 18:02:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2020-10-14 18:02:42,594 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 242 [2020-10-14 18:02:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:42,594 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2020-10-14 18:02:42,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:02:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2020-10-14 18:02:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-14 18:02:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:42,596 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:42,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:02:42,597 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2058580790, now seen corresponding path program 32 times [2020-10-14 18:02:42,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:42,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492683839] [2020-10-14 18:02:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:42,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:47,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:47,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-14 18:02:47,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:02:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:48,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:48,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:48,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:48,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:48,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-14 18:02:48,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492683839] [2020-10-14 18:02:48,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:48,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:02:48,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280560756] [2020-10-14 18:02:48,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:02:48,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:02:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:48,363 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand 36 states. [2020-10-14 18:02:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:49,075 INFO L93 Difference]: Finished difference Result 476 states and 496 transitions. [2020-10-14 18:02:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:02:49,075 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 249 [2020-10-14 18:02:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:49,077 INFO L225 Difference]: With dead ends: 476 [2020-10-14 18:02:49,077 INFO L226 Difference]: Without dead ends: 261 [2020-10-14 18:02:49,079 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 [2020-10-14 18:02:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-14 18:02:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-14 18:02:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 18:02:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 268 transitions. [2020-10-14 18:02:49,088 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 268 transitions. Word has length 249 [2020-10-14 18:02:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:49,089 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 268 transitions. [2020-10-14 18:02:49,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:02:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 268 transitions. [2020-10-14 18:02:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-14 18:02:49,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:49,091 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:49,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:02:49,091 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2086609703, now seen corresponding path program 33 times [2020-10-14 18:02:49,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:49,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916236940] [2020-10-14 18:02:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:49,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:54,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:54,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-14 18:02:54,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:02:54,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:02:54,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:54,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:02:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-14 18:02:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:02:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:54,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:54,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:54,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:54,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:54,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-14 18:02:54,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916236940] [2020-10-14 18:02:54,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:54,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:02:54,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022685244] [2020-10-14 18:02:54,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:02:54,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:02:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:54,947 INFO L87 Difference]: Start difference. First operand 261 states and 268 transitions. Second operand 37 states. [2020-10-14 18:02:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:55,715 INFO L93 Difference]: Finished difference Result 489 states and 509 transitions. [2020-10-14 18:02:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:02:55,715 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 256 [2020-10-14 18:02:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:55,717 INFO L225 Difference]: With dead ends: 489 [2020-10-14 18:02:55,717 INFO L226 Difference]: Without dead ends: 268 [2020-10-14 18:02:55,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-14 18:02:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-14 18:02:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-14 18:02:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2020-10-14 18:02:55,725 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 256 [2020-10-14 18:02:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:55,726 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2020-10-14 18:02:55,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:02:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2020-10-14 18:02:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-14 18:02:55,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:55,728 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:55,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:02:55,728 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash 387541546, now seen corresponding path program 34 times [2020-10-14 18:02:55,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:55,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456078818] [2020-10-14 18:02:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:55,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:56,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:58,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:00,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-14 18:03:00,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:00,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-14 18:03:00,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:00,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:03:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-14 18:03:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:03:00,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:01,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:01,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2020-10-14 18:03:01,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456078818] [2020-10-14 18:03:01,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:01,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:03:01,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319629865] [2020-10-14 18:03:01,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:03:01,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:03:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:03:01,699 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand 38 states. [2020-10-14 18:03:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:02,388 INFO L93 Difference]: Finished difference Result 502 states and 522 transitions. [2020-10-14 18:03:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:03:02,388 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 263 [2020-10-14 18:03:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:02,390 INFO L225 Difference]: With dead ends: 502 [2020-10-14 18:03:02,390 INFO L226 Difference]: Without dead ends: 275 [2020-10-14 18:03:02,392 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 [2020-10-14 18:03:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-14 18:03:02,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-10-14 18:03:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 18:03:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 282 transitions. [2020-10-14 18:03:02,399 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 282 transitions. Word has length 263 [2020-10-14 18:03:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:02,399 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 282 transitions. [2020-10-14 18:03:02,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:03:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 282 transitions. [2020-10-14 18:03:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-14 18:03:02,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:02,401 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:02,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:03:02,401 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash 499979975, now seen corresponding path program 35 times [2020-10-14 18:03:02,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:02,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470783971] [2020-10-14 18:03:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:02,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:03:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 122 [2020-10-14 18:03:07,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:03:07,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:08,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:08,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:08,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:08,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:08,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2020-10-14 18:03:08,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470783971] [2020-10-14 18:03:08,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:08,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:03:08,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557875474] [2020-10-14 18:03:08,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:03:08,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:08,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:03:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:03:08,320 INFO L87 Difference]: Start difference. First operand 275 states and 282 transitions. Second operand 39 states. [2020-10-14 18:03:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:09,055 INFO L93 Difference]: Finished difference Result 515 states and 535 transitions. [2020-10-14 18:03:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:03:09,056 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 270 [2020-10-14 18:03:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:09,057 INFO L225 Difference]: With dead ends: 515 [2020-10-14 18:03:09,057 INFO L226 Difference]: Without dead ends: 282 [2020-10-14 18:03:09,059 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 [2020-10-14 18:03:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-14 18:03:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-14 18:03:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 18:03:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2020-10-14 18:03:09,066 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 270 [2020-10-14 18:03:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:09,067 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2020-10-14 18:03:09,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:03:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2020-10-14 18:03:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-14 18:03:09,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:09,069 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:09,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:03:09,069 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2014420874, now seen corresponding path program 36 times [2020-10-14 18:03:09,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:09,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518170878] [2020-10-14 18:03:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:09,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:09,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:12,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:14,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:03:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-14 18:03:14,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:03:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:14,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:14,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:14,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:14,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:14,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:14,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-10-14 18:03:15,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518170878] [2020-10-14 18:03:15,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:15,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:03:15,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148346801] [2020-10-14 18:03:15,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:03:15,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:03:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:15,027 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand 40 states. [2020-10-14 18:03:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:15,748 INFO L93 Difference]: Finished difference Result 528 states and 548 transitions. [2020-10-14 18:03:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:03:15,749 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 277 [2020-10-14 18:03:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:15,750 INFO L225 Difference]: With dead ends: 528 [2020-10-14 18:03:15,750 INFO L226 Difference]: Without dead ends: 289 [2020-10-14 18:03:15,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-14 18:03:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2020-10-14 18:03:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 18:03:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 296 transitions. [2020-10-14 18:03:15,758 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 296 transitions. Word has length 277 [2020-10-14 18:03:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:15,759 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 296 transitions. [2020-10-14 18:03:15,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:03:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 296 transitions. [2020-10-14 18:03:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-14 18:03:15,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:15,761 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:15,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:03:15,761 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1509175911, now seen corresponding path program 37 times [2020-10-14 18:03:15,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:15,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777101129] [2020-10-14 18:03:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:15,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:19,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:20,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:03:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 18:03:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:03:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:21,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4921 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4218 trivial. 0 not checked. [2020-10-14 18:03:21,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777101129] [2020-10-14 18:03:21,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:21,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:03:21,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032978453] [2020-10-14 18:03:21,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:03:21,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:03:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:21,824 INFO L87 Difference]: Start difference. First operand 289 states and 296 transitions. Second operand 41 states. [2020-10-14 18:03:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:22,680 INFO L93 Difference]: Finished difference Result 541 states and 561 transitions. [2020-10-14 18:03:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:03:22,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 284 [2020-10-14 18:03:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:22,683 INFO L225 Difference]: With dead ends: 541 [2020-10-14 18:03:22,683 INFO L226 Difference]: Without dead ends: 296 [2020-10-14 18:03:22,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-14 18:03:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2020-10-14 18:03:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-14 18:03:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2020-10-14 18:03:22,692 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 284 [2020-10-14 18:03:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:22,693 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2020-10-14 18:03:22,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:03:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2020-10-14 18:03:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-14 18:03:22,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:22,695 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:22,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:03:22,695 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash -268227350, now seen corresponding path program 38 times [2020-10-14 18:03:22,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:22,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488761555] [2020-10-14 18:03:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:22,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:27,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:03:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 18:03:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:03:27,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:28,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5187 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 4446 trivial. 0 not checked. [2020-10-14 18:03:28,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488761555] [2020-10-14 18:03:28,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:28,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:03:28,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251925685] [2020-10-14 18:03:28,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:03:28,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:03:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:28,826 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand 42 states. [2020-10-14 18:03:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:29,733 INFO L93 Difference]: Finished difference Result 554 states and 574 transitions. [2020-10-14 18:03:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:03:29,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 291 [2020-10-14 18:03:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:29,735 INFO L225 Difference]: With dead ends: 554 [2020-10-14 18:03:29,735 INFO L226 Difference]: Without dead ends: 303 [2020-10-14 18:03:29,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-14 18:03:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2020-10-14 18:03:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 18:03:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 310 transitions. [2020-10-14 18:03:29,744 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 310 transitions. Word has length 291 [2020-10-14 18:03:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:29,744 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 310 transitions. [2020-10-14 18:03:29,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:03:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 310 transitions. [2020-10-14 18:03:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-14 18:03:29,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:29,746 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:29,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:03:29,746 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1271297543, now seen corresponding path program 39 times [2020-10-14 18:03:29,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:29,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814796768] [2020-10-14 18:03:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:03:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 18:03:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:03:34,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:35,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:35,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:35,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:35,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:35,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 4680 trivial. 0 not checked. [2020-10-14 18:03:35,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814796768] [2020-10-14 18:03:35,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:35,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:03:35,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299035412] [2020-10-14 18:03:35,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:03:35,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:03:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:03:35,922 INFO L87 Difference]: Start difference. First operand 303 states and 310 transitions. Second operand 43 states. [2020-10-14 18:03:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:36,826 INFO L93 Difference]: Finished difference Result 567 states and 587 transitions. [2020-10-14 18:03:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:03:36,827 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 298 [2020-10-14 18:03:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:36,829 INFO L225 Difference]: With dead ends: 567 [2020-10-14 18:03:36,829 INFO L226 Difference]: Without dead ends: 310 [2020-10-14 18:03:36,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:03:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-14 18:03:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2020-10-14 18:03:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-14 18:03:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2020-10-14 18:03:36,839 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 298 [2020-10-14 18:03:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:36,839 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2020-10-14 18:03:36,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:03:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2020-10-14 18:03:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-14 18:03:36,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:36,842 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:36,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:03:36,842 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1875111350, now seen corresponding path program 40 times [2020-10-14 18:03:36,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:36,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536182068] [2020-10-14 18:03:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:41,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:41,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-14 18:03:41,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-14 18:03:41,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:41,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:03:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-14 18:03:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:03:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:43,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:43,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:43,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:43,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5740 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 4920 trivial. 0 not checked. [2020-10-14 18:03:43,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536182068] [2020-10-14 18:03:43,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:43,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:03:43,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838692001] [2020-10-14 18:03:43,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:03:43,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:03:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:03:43,085 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand 44 states. [2020-10-14 18:03:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:43,902 INFO L93 Difference]: Finished difference Result 580 states and 600 transitions. [2020-10-14 18:03:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:03:43,902 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 305 [2020-10-14 18:03:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:43,905 INFO L225 Difference]: With dead ends: 580 [2020-10-14 18:03:43,905 INFO L226 Difference]: Without dead ends: 317 [2020-10-14 18:03:43,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:03:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-14 18:03:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2020-10-14 18:03:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-14 18:03:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 324 transitions. [2020-10-14 18:03:43,914 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 324 transitions. Word has length 305 [2020-10-14 18:03:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:43,915 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 324 transitions. [2020-10-14 18:03:43,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:03:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 324 transitions. [2020-10-14 18:03:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-14 18:03:43,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:43,917 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:43,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:03:43,918 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash -189406809, now seen corresponding path program 41 times [2020-10-14 18:03:43,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688968414] [2020-10-14 18:03:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:44,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:44,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking...