/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:51:49,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:51:49,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:51:49,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:51:49,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:51:49,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:51:49,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:51:49,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:51:49,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:51:49,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:51:49,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:51:49,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:51:49,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:51:49,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:51:49,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:51:49,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:51:49,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:51:49,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:51:49,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:51:49,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:51:49,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:51:49,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:51:49,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:51:49,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:51:49,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:51:49,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:51:49,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:51:49,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:51:49,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:51:49,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:51:49,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:51:49,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:51:49,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:51:49,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:51:49,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:51:49,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:51:49,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:51:49,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:51:49,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:51:49,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:51:49,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:51:49,989 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 21:51:50,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:51:50,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:51:50,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:51:50,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:51:50,035 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:51:50,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:51:50,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:51:50,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:51:50,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:51:50,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:51:50,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:51:50,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:51:50,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:51:50,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:51:50,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:51:50,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:51:50,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:51:50,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:51:50,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:51:50,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:51:50,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:51:50,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:50,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:51:50,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:51:50,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:51:50,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:51:50,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:51:50,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:51:50,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:51:50,042 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:51:50,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:51:50,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:51:50,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:51:50,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:51:50,559 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:51:50,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-24 21:51:50,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c358eddf8/bd3406eed0ff434cb6dae912a3c18bd3/FLAGb3b4a58c1 [2020-09-24 21:51:51,178 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:51:51,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-09-24 21:51:51,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c358eddf8/bd3406eed0ff434cb6dae912a3c18bd3/FLAGb3b4a58c1 [2020-09-24 21:51:51,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c358eddf8/bd3406eed0ff434cb6dae912a3c18bd3 [2020-09-24 21:51:51,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:51:51,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:51:51,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:51,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:51:51,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:51:51,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3155a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51, skipping insertion in model container [2020-09-24 21:51:51,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:51:51,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:51:51,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:51,805 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:51:51,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:51,839 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:51:51,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51 WrapperNode [2020-09-24 21:51:51,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:51,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:51:51,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:51:51,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:51:51,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (1/1) ... [2020-09-24 21:51:51,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:51:51,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:51:51,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:51:51,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:51:51,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (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 21:51:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:51:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:51:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:51:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:51:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:51:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:51:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:51:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:51:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:51:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:51:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:51:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:51:52,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:51:52,287 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:51:52,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:52 BoogieIcfgContainer [2020-09-24 21:51:52,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:51:52,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:51:52,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:51:52,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:51:52,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:51:51" (1/3) ... [2020-09-24 21:51:52,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd5c116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:52, skipping insertion in model container [2020-09-24 21:51:52,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:51" (2/3) ... [2020-09-24 21:51:52,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd5c116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:52, skipping insertion in model container [2020-09-24 21:51:52,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:52" (3/3) ... [2020-09-24 21:51:52,309 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2020-09-24 21:51:52,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:51:52,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:51:52,404 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:51:52,446 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:51:52,446 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:51:52,446 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:51:52,446 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:51:52,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:51:52,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:51:52,447 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:51:52,447 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:51:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-24 21:51:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 21:51:52,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:52,476 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] [2020-09-24 21:51:52,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:52,483 INFO L82 PathProgramCache]: Analyzing trace with hash 341466613, now seen corresponding path program 1 times [2020-09-24 21:51:52,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:52,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802539757] [2020-09-24 21:51:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:51:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 21:51:52,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:51:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:51:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:52,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:51:52,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:52,799 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 21:51:52,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802539757] [2020-09-24 21:51:52,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:52,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:51:52,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543135720] [2020-09-24 21:51:52,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:51:52,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:51:52,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:51:52,834 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-09-24 21:51:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:53,015 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-24 21:51:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:51:53,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-24 21:51:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:53,037 INFO L225 Difference]: With dead ends: 51 [2020-09-24 21:51:53,037 INFO L226 Difference]: Without dead ends: 27 [2020-09-24 21:51:53,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:51:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-24 21:51:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-24 21:51:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 21:51:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-24 21:51:53,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2020-09-24 21:51:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:53,107 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-24 21:51:53,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:51:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-24 21:51:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 21:51:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:53,109 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] [2020-09-24 21:51:53,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:51:53,110 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash 178703795, now seen corresponding path program 1 times [2020-09-24 21:51:53,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:53,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129676578] [2020-09-24 21:51:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 21:51:53,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:53,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-09-24 21:51:53,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:51:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:53,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:51:53,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:53,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:53,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:53,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:53,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:53,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:53,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,629 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 21:51:53,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129676578] [2020-09-24 21:51:53,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:53,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:51:53,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683648285] [2020-09-24 21:51:53,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:51:53,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:51:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:51:53,635 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-24 21:51:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:53,939 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-24 21:51:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:51:53,940 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-24 21:51:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:53,942 INFO L225 Difference]: With dead ends: 38 [2020-09-24 21:51:53,942 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 21:51:53,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:51:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 21:51:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-24 21:51:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 21:51:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-09-24 21:51:53,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2020-09-24 21:51:53,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:53,962 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-09-24 21:51:53,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:51:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-09-24 21:51:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 21:51:53,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:53,964 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:51:53,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:51:53,965 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 563687025, now seen corresponding path program 2 times [2020-09-24 21:51:53,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:53,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942335346] [2020-09-24 21:51:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:54,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:54,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:51:54,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:51:54,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-09-24 21:51:54,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:54,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:51:54,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:54,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:51:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:54,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:54,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:54,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:54,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:54,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:54,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:54,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942335346] [2020-09-24 21:51:54,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:54,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:51:54,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723115507] [2020-09-24 21:51:54,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:51:54,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:51:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:51:54,557 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-09-24 21:51:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:54,853 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-24 21:51:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:51:54,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-24 21:51:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:54,855 INFO L225 Difference]: With dead ends: 42 [2020-09-24 21:51:54,855 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 21:51:54,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:51:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 21:51:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-24 21:51:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 21:51:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-24 21:51:54,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 29 [2020-09-24 21:51:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:54,863 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-24 21:51:54,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:51:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-24 21:51:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:51:54,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:54,865 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:51:54,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:51:54,865 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:54,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1026490321, now seen corresponding path program 3 times [2020-09-24 21:51:54,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:54,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242755808] [2020-09-24 21:51:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:55,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:51:55,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:51:55,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-09-24 21:51:55,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:51:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:51:55,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:55,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:55,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:55,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:55,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:55,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:55,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:55,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:55,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242755808] [2020-09-24 21:51:55,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:55,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:51:55,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154832109] [2020-09-24 21:51:55,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:51:55,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:51:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:51:55,829 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2020-09-24 21:51:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:56,199 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-24 21:51:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:51:56,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-24 21:51:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:56,201 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:51:56,201 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 21:51:56,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:51:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 21:51:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-24 21:51:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 21:51:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-24 21:51:56,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 33 [2020-09-24 21:51:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:56,209 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-24 21:51:56,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:51:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-24 21:51:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:51:56,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:56,210 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:51:56,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:51:56,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2083373805, now seen corresponding path program 4 times [2020-09-24 21:51:56,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:56,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9744563] [2020-09-24 21:51:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:57,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:51:57,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:51:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-09-24 21:51:57,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:51:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 21:51:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:57,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:57,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:57,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:57,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:57,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:57,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9744563] [2020-09-24 21:51:57,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:57,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:51:57,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923553950] [2020-09-24 21:51:57,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:51:57,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:51:57,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:51:57,762 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2020-09-24 21:51:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:58,169 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-24 21:51:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:51:58,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-24 21:51:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:58,171 INFO L225 Difference]: With dead ends: 50 [2020-09-24 21:51:58,171 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 21:51:58,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:51:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 21:51:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-24 21:51:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:51:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 21:51:58,178 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 37 [2020-09-24 21:51:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:58,179 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 21:51:58,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:51:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 21:51:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:51:58,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:58,181 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:51:58,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:51:58,181 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash -540084565, now seen corresponding path program 5 times [2020-09-24 21:51:58,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:58,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213975359] [2020-09-24 21:51:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:59,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:51:59,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:51:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-09-24 21:51:59,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:59,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:51:59,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:51:59,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:51:59,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:59,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:59,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:59,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:59,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:59,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:59,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:59,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:59,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:59,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:59,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:59,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213975359] [2020-09-24 21:51:59,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:59,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:51:59,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301910703] [2020-09-24 21:51:59,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:51:59,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:51:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:51:59,555 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 17 states. [2020-09-24 21:52:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:00,079 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-09-24 21:52:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:52:00,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-09-24 21:52:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:00,082 INFO L225 Difference]: With dead ends: 54 [2020-09-24 21:52:00,083 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 21:52:00,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:52:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 21:52:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-09-24 21:52:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 21:52:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-09-24 21:52:00,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 41 [2020-09-24 21:52:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:00,096 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-09-24 21:52:00,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:52:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-09-24 21:52:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 21:52:00,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:00,098 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:52:00,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:52:00,098 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1679039337, now seen corresponding path program 6 times [2020-09-24 21:52:00,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:00,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447782121] [2020-09-24 21:52:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:00,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:01,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:01,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:52:01,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:52:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-09-24 21:52:01,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:52:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:52:01,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:52:01,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:01,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:01,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:01,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:01,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:01,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:01,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:52:01,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:01,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:01,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:01,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447782121] [2020-09-24 21:52:01,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:01,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:52:01,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632066866] [2020-09-24 21:52:01,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:52:01,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:01,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:52:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:52:01,599 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 19 states. [2020-09-24 21:52:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:02,248 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-24 21:52:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:52:02,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-09-24 21:52:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:02,249 INFO L225 Difference]: With dead ends: 58 [2020-09-24 21:52:02,249 INFO L226 Difference]: Without dead ends: 51 [2020-09-24 21:52:02,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:52:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-24 21:52:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-09-24 21:52:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 21:52:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-09-24 21:52:02,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 45 [2020-09-24 21:52:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:02,264 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-09-24 21:52:02,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:52:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-09-24 21:52:02,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 21:52:02,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:02,265 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:52:02,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:52:02,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1134342439, now seen corresponding path program 7 times [2020-09-24 21:52:02,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:02,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292526988] [2020-09-24 21:52:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:03,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 21:52:03,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:52:03,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-09-24 21:52:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:52:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:52:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:52:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:04,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:04,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:52:04,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:04,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292526988] [2020-09-24 21:52:04,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:04,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:52:04,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203609595] [2020-09-24 21:52:04,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:52:04,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:52:04,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:52:04,042 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 21 states. [2020-09-24 21:52:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:04,727 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-09-24 21:52:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:52:04,728 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-09-24 21:52:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:04,729 INFO L225 Difference]: With dead ends: 62 [2020-09-24 21:52:04,729 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:52:04,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:52:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:52:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-09-24 21:52:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 21:52:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-09-24 21:52:04,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 49 [2020-09-24 21:52:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:04,740 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-09-24 21:52:04,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:52:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-09-24 21:52:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:52:04,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:04,741 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:52:04,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:52:04,742 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:04,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1565013989, now seen corresponding path program 8 times [2020-09-24 21:52:04,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:04,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662200786] [2020-09-24 21:52:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:04,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:07,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:52:07,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:52:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2330 [2020-09-24 21:52:07,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:07,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 21:52:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:52:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 21:52:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:07,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:07,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:07,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:07,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:07,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:07,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:07,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:07,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:07,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662200786] [2020-09-24 21:52:07,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:07,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:52:07,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701305154] [2020-09-24 21:52:07,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:52:07,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:52:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:52:07,500 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 23 states. [2020-09-24 21:52:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:08,358 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-24 21:52:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:52:08,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-09-24 21:52:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:08,360 INFO L225 Difference]: With dead ends: 66 [2020-09-24 21:52:08,360 INFO L226 Difference]: Without dead ends: 59 [2020-09-24 21:52:08,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:52:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-24 21:52:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-24 21:52:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 21:52:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-09-24 21:52:08,369 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 53 [2020-09-24 21:52:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:08,369 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-09-24 21:52:08,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:52:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-09-24 21:52:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 21:52:08,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:08,371 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:52:08,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:52:08,371 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash 339095459, now seen corresponding path program 9 times [2020-09-24 21:52:08,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:08,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748326074] [2020-09-24 21:52:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:11,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:52:11,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:52:11,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2713 [2020-09-24 21:52:11,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 21:52:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:52:11,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 21:52:11,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:11,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:11,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:11,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:11,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:11,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:11,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:11,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:11,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:11,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748326074] [2020-09-24 21:52:11,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:11,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 21:52:11,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151112417] [2020-09-24 21:52:11,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 21:52:11,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:11,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 21:52:11,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:52:11,514 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 25 states. [2020-09-24 21:52:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:12,697 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-09-24 21:52:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:52:12,698 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-09-24 21:52:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:12,699 INFO L225 Difference]: With dead ends: 70 [2020-09-24 21:52:12,699 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 21:52:12,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:52:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 21:52:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-24 21:52:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:52:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-24 21:52:12,715 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 57 [2020-09-24 21:52:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:12,715 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-24 21:52:12,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 21:52:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-24 21:52:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:52:12,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:12,717 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:52:12,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:52:12,717 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 801511521, now seen corresponding path program 10 times [2020-09-24 21:52:12,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:12,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312492913] [2020-09-24 21:52:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:17,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 21:52:17,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 21:52:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4278 [2020-09-24 21:52:17,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-24 21:52:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:52:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:52:17,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:17,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:17,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:17,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:17,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:17,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:17,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:17,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312492913] [2020-09-24 21:52:17,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:17,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:52:17,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093005686] [2020-09-24 21:52:17,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:52:17,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:52:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:52:17,480 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 27 states. [2020-09-24 21:52:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:18,856 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-09-24 21:52:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:52:18,857 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-09-24 21:52:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:18,857 INFO L225 Difference]: With dead ends: 62 [2020-09-24 21:52:18,857 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 21:52:18,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=431, Invalid=2119, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:52:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 21:52:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 21:52:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 21:52:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 21:52:18,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-09-24 21:52:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:18,861 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 21:52:18,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 21:52:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 21:52:18,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 21:52:18,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:52:18,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 21:52:19,061 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-09-24 21:52:19,066 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:52:19,066 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-24 21:52:19,067 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_144~0 |old(~__return_144~0)|)) [2020-09-24 21:52:19,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:52:19,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:52:19,067 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 21:52:19,067 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 21:52:19,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-24 21:52:19,068 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 21:52:19,069 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-09-24 21:52:19,070 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-09-24 21:52:19,071 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-24 21:52:19,071 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 21:52:19,071 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 21:52:19,072 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-24 21:52:19,072 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 21:52:19,072 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 21:52:19,072 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-24 21:52:19,073 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-24 21:52:19,075 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse2 (<= main_~main__x~0 (+ main_~main__y~0 24))) (.cse1 (= |old(~__return_144~0)| ~__return_144~0))) (or (let ((.cse0 (+ main_~main__x~0 50))) (and (<= 0 .cse0) .cse1 (<= .cse0 0))) (let ((.cse4 (+ main_~main__x~0 53)) (.cse3 (* 2 main_~main__y~0))) (and .cse2 (<= .cse3 .cse4) (<= .cse4 .cse3) .cse1)) (and .cse2 (<= (+ main_~main__x~0 3) (* 7 main_~main__y~0)) .cse1) (let ((.cse5 (+ main_~main__x~0 51))) (and (<= main_~main__y~0 .cse5) (<= .cse5 main_~main__y~0) .cse1)) (and (<= main_~main__x~0 25) .cse1 (<= (+ main_~main__x~0 56) (* 3 main_~main__y~0))))) [2020-09-24 21:52:19,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:52:19 BoogieIcfgContainer [2020-09-24 21:52:19,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:52:19,108 INFO L168 Benchmark]: Toolchain (without parser) took 27576.56 ms. Allocated memory was 146.8 MB in the beginning and 377.5 MB in the end (delta: 230.7 MB). Free memory was 102.0 MB in the beginning and 153.8 MB in the end (delta: -51.8 MB). Peak memory consumption was 178.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,114 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.72 ms. Allocated memory is still 146.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,121 INFO L168 Benchmark]: Boogie Preprocessor took 124.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 182.2 MB in the end (delta: -90.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,121 INFO L168 Benchmark]: RCFGBuilder took 328.66 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,124 INFO L168 Benchmark]: TraceAbstraction took 26807.64 ms. Allocated memory was 203.4 MB in the beginning and 377.5 MB in the end (delta: 174.1 MB). Free memory was 167.7 MB in the beginning and 153.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:19,130 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.72 ms. Allocated memory is still 146.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 182.2 MB in the end (delta: -90.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.66 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26807.64 ms. Allocated memory was 203.4 MB in the beginning and 377.5 MB in the end (delta: 174.1 MB). Free memory was 167.7 MB in the beginning and 153.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((0 <= main__x + 50 && \old(__return_144) == __return_144) && main__x + 50 <= 0) || (((main__x <= main__y + 24 && 2 * main__y <= main__x + 53) && main__x + 53 <= 2 * main__y) && \old(__return_144) == __return_144)) || ((main__x <= main__y + 24 && main__x + 3 <= 7 * main__y) && \old(__return_144) == __return_144)) || ((main__y <= main__x + 51 && main__x + 51 <= main__y) && \old(__return_144) == __return_144)) || ((main__x <= 25 && \old(__return_144) == __return_144) && main__x + 56 <= 3 * main__y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.4s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 648 SDslu, 639 SDs, 0 SdLazy, 4054 SolverSat, 203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 15 NumberOfFragments, 94 HoareAnnotationTreeSize, 5 FomulaSimplifications, 102 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 119 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 18.8s InterpolantComputationTime, 451 NumberOfCodeBlocks, 451 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 440 ConstructedInterpolants, 0 QuantifiedInterpolants, 95164 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/715 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 correct! Received shutdown request...