/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 SingleStatement --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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:23,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:23,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:23,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:23,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:23,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:23,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:23,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:23,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:23,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:23,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:24,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:24,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:24,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:24,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:24,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:24,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:24,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:24,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:24,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:24,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:24,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:24,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:24,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:24,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:24,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:24,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:24,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:24,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:24,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:24,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:24,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:24,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:24,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:24,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:24,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:24,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:24,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:24,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:24,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:24,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:24,029 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 [2020-09-24 18:29:24,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:24,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:24,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:24,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:24,072 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:24,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:24,073 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:24,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:24,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:24,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:24,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:24,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:24,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:24,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:24,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:24,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:24,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:24,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:24,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:24,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:24,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:24,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:24,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:24,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:24,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:24,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:24,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:24,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:24,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:24,081 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 -> SingleStatement 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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:24,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:24,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:24,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:24,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:24,580 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:24,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 18:29:24,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ff6df8fe/1153d65c3e47444284337fdfe10709c2/FLAGfc3f11f6c [2020-09-24 18:29:25,156 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:25,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 18:29:25,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ff6df8fe/1153d65c3e47444284337fdfe10709c2/FLAGfc3f11f6c [2020-09-24 18:29:25,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ff6df8fe/1153d65c3e47444284337fdfe10709c2 [2020-09-24 18:29:25,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:25,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:25,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:25,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:25,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:25,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f92ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25, skipping insertion in model container [2020-09-24 18:29:25,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:25,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:25,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:25,813 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:25,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:25,850 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:25,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25 WrapperNode [2020-09-24 18:29:25,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:25,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:25,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:25,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:25,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... [2020-09-24 18:29:25,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:25,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:25,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:25,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:25,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:26,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:26,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:26,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:26,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:26,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:26,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:26,262 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:26,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:26 BoogieIcfgContainer [2020-09-24 18:29:26,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:26,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:26,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:26,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:26,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:25" (1/3) ... [2020-09-24 18:29:26,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af8ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:26, skipping insertion in model container [2020-09-24 18:29:26,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:25" (2/3) ... [2020-09-24 18:29:26,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af8ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:26, skipping insertion in model container [2020-09-24 18:29:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:26" (3/3) ... [2020-09-24 18:29:26,276 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-24 18:29:26,287 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:26,297 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:26,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:26,347 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:26,348 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:26,348 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:26,348 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:26,348 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:26,348 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:26,349 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:26,349 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 18:29:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 18:29:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:26,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:26,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-24 18:29:26,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:26,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903093241] [2020-09-24 18:29:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:29:26,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:26,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-24 18:29:26,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:29:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:26,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:26,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:26,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903093241] [2020-09-24 18:29:26,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:26,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 18:29:26,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636582987] [2020-09-24 18:29:26,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 18:29:26,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 18:29:26,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:26,700 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-24 18:29:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:26,728 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-24 18:29:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 18:29:26,730 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 18:29:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:26,740 INFO L225 Difference]: With dead ends: 35 [2020-09-24 18:29:26,741 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 18:29:26,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 18:29:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-24 18:29:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-24 18:29:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-24 18:29:26,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-24 18:29:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:26,791 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-24 18:29:26,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 18:29:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-24 18:29:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 18:29:26,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:26,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:26,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:26,793 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-24 18:29:26,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:26,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094562235] [2020-09-24 18:29:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 18:29:26,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:26,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-24 18:29:26,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:26,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 18:29:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 18:29:26,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:26,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:26,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:26,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:26,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:26,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:26,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094562235] [2020-09-24 18:29:26,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:26,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:29:26,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935946741] [2020-09-24 18:29:26,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:29:26,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:29:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:26,996 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-24 18:29:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,053 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-24 18:29:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:29:27,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-24 18:29:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,055 INFO L225 Difference]: With dead ends: 34 [2020-09-24 18:29:27,055 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 18:29:27,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 18:29:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-24 18:29:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 18:29:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 18:29:27,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-24 18:29:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,063 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 18:29:27,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:29:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 18:29:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 18:29:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:27,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:27,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-24 18:29:27,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746083507] [2020-09-24 18:29:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 18:29:27,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:27,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-24 18:29:27,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:27,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 18:29:27,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:29:27,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:27,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:27,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:27,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746083507] [2020-09-24 18:29:27,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:27,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:29:27,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411599328] [2020-09-24 18:29:27,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:27,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:27,273 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 18:29:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,348 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-24 18:29:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:27,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 18:29:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,350 INFO L225 Difference]: With dead ends: 40 [2020-09-24 18:29:27,350 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 18:29:27,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 18:29:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-24 18:29:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 18:29:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 18:29:27,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-24 18:29:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,358 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 18:29:27,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 18:29:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 18:29:27,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:27,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:27,360 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-24 18:29:27,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627443735] [2020-09-24 18:29:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 18:29:27,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:29:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-09-24 18:29:27,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:29:27,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:29:27,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:27,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:27,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:27,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 18:29:27,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627443735] [2020-09-24 18:29:27,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:27,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:29:27,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547603232] [2020-09-24 18:29:27,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:27,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:27,729 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2020-09-24 18:29:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,837 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-24 18:29:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:27,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-24 18:29:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,839 INFO L225 Difference]: With dead ends: 38 [2020-09-24 18:29:27,840 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 18:29:27,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 18:29:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-09-24 18:29:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 18:29:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 18:29:27,847 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-09-24 18:29:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,848 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 18:29:27,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 18:29:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 18:29:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,849 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:27,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:27,850 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1918594294, now seen corresponding path program 1 times [2020-09-24 18:29:27,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738907110] [2020-09-24 18:29:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 18:29:28,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:29:28,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-09-24 18:29:28,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:28,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 18:29:28,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:29:28,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:28,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:28,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:28,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:28,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:28,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:28,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:28,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738907110] [2020-09-24 18:29:28,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:28,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:29:28,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560997414] [2020-09-24 18:29:28,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:28,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:28,652 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-09-24 18:29:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:28,805 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-09-24 18:29:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:28,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-24 18:29:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:28,808 INFO L225 Difference]: With dead ends: 51 [2020-09-24 18:29:28,808 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 18:29:28,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 18:29:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-24 18:29:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 18:29:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 18:29:28,829 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-09-24 18:29:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:28,830 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 18:29:28,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 18:29:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 18:29:28,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:28,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:28,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:29:28,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 2 times [2020-09-24 18:29:28,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:28,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480163306] [2020-09-24 18:29:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:28,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:29,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 18:29:29,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:29:29,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-09-24 18:29:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 18:29:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:29:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 18:29:29,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:29,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:29,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:29,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:29,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:29,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:29,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 18:29:29,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480163306] [2020-09-24 18:29:29,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:29,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:29:29,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47314362] [2020-09-24 18:29:29,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:29,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:29,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:29,442 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2020-09-24 18:29:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:29,561 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-24 18:29:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:29,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-24 18:29:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:29,566 INFO L225 Difference]: With dead ends: 49 [2020-09-24 18:29:29,566 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 18:29:29,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 18:29:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 18:29:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 18:29:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-24 18:29:29,584 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-24 18:29:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:29,584 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-24 18:29:29,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-24 18:29:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 18:29:29,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:29,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:29,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:29:29,593 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 3 times [2020-09-24 18:29:29,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:29,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332987819] [2020-09-24 18:29:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 18:29:30,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:29:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-24 18:29:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 18:29:30,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:29:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:30,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:30,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:30,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:30,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:29:30,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:30,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:30,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 18:29:30,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332987819] [2020-09-24 18:29:30,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:30,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:29:30,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396078714] [2020-09-24 18:29:30,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:30,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:30,462 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-09-24 18:29:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:30,606 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-24 18:29:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:29:30,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-09-24 18:29:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:30,608 INFO L225 Difference]: With dead ends: 54 [2020-09-24 18:29:30,608 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 18:29:30,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 18:29:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 18:29:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 18:29:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-24 18:29:30,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-24 18:29:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:30,624 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-24 18:29:30,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-24 18:29:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 18:29:30,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:30,626 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:30,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:29:30,626 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 4 times [2020-09-24 18:29:30,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:30,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586474654] [2020-09-24 18:29:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:31,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:31,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:29:31,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:29:31,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-09-24 18:29:31,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 18:29:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 18:29:31,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:31,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:31,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:31,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:31,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:31,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:31,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:31,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:31,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 18:29:31,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586474654] [2020-09-24 18:29:31,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:31,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:29:31,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470968290] [2020-09-24 18:29:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:29:31,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:29:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:31,337 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 11 states. [2020-09-24 18:29:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:31,491 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-24 18:29:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:29:31,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-24 18:29:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:31,492 INFO L225 Difference]: With dead ends: 59 [2020-09-24 18:29:31,493 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 18:29:31,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:29:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 18:29:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-24 18:29:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 18:29:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 18:29:31,499 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-24 18:29:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:31,500 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 18:29:31,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:29:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 18:29:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 18:29:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:31,501 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:31,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:29:31,502 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 5 times [2020-09-24 18:29:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:31,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329155682] [2020-09-24 18:29:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:31,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:31,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 18:29:31,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-09-24 18:29:31,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 18:29:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 18:29:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 18:29:31,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:32,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:32,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:32,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:32,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:32,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:32,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 59 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 18:29:32,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329155682] [2020-09-24 18:29:32,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:32,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:29:32,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769411484] [2020-09-24 18:29:32,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:29:32,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:29:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:32,107 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2020-09-24 18:29:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:32,312 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-24 18:29:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:29:32,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-09-24 18:29:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:32,314 INFO L225 Difference]: With dead ends: 61 [2020-09-24 18:29:32,314 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 18:29:32,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:29:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 18:29:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-24 18:29:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 18:29:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-24 18:29:32,321 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-24 18:29:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:32,321 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-24 18:29:32,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:29:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-24 18:29:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 18:29:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:32,323 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:32,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:29:32,323 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 6 times [2020-09-24 18:29:32,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:32,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039656740] [2020-09-24 18:29:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:29:32,336 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:29:32,336 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:29:32,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:29:32,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:32 BoogieIcfgContainer [2020-09-24 18:29:32,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:32,365 INFO L168 Benchmark]: Toolchain (without parser) took 6821.88 ms. Allocated memory was 139.5 MB in the beginning and 277.9 MB in the end (delta: 138.4 MB). Free memory was 102.9 MB in the beginning and 186.8 MB in the end (delta: -83.8 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:32,366 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:29:32,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:32,367 INFO L168 Benchmark]: Boogie Preprocessor took 119.42 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 179.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:32,368 INFO L168 Benchmark]: RCFGBuilder took 294.83 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:32,369 INFO L168 Benchmark]: TraceAbstraction took 6093.63 ms. Allocated memory was 200.8 MB in the beginning and 277.9 MB in the end (delta: 77.1 MB). Free memory was 168.3 MB in the beginning and 186.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:32,373 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.42 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 179.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.83 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6093.63 ms. Allocated memory was 200.8 MB in the beginning and 277.9 MB in the end (delta: 77.1 MB). Free memory was 168.3 MB in the beginning and 186.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 104 SDslu, 408 SDs, 0 SdLazy, 274 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 320 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 16192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 221/322 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...