/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:13:05,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:13:05,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:13:05,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:13:05,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:13:05,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:13:05,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:13:05,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:13:05,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:13:05,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:13:05,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:13:05,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:13:05,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:13:05,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:13:05,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:13:05,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:13:05,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:13:05,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:13:05,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:13:05,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:13:05,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:13:05,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:13:05,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:13:05,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:13:05,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 17:13:05,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:13:05,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:13:05,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:13:05,984 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 17:13:06,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:13:06,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:13:06,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:13:06,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:13:06,040 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:13:06,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:13:06,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:13:06,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:13:06,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:13:06,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:13:06,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:13:06,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:13:06,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:13:06,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:13:06,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:13:06,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:13:06,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:13:06,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:13:06,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:13:06,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:13:06,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:13:06,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:13:06,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:13:06,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:13:06,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:13:06,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:13:06,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:13:06,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:13:06,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:13:06,047 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;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;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;log-additional-information=true; [2020-09-24 17:13:06,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:13:06,508 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:13:06,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:13:06,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:13:06,516 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:13:06,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-24 17:13:06,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5/FLAG9ce1b08ba [2020-09-24 17:13:07,272 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:13:07,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-24 17:13:07,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5/FLAG9ce1b08ba [2020-09-24 17:13:07,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5 [2020-09-24 17:13:07,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:13:07,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:13:07,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:13:07,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:13:07,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:13:07,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:13:07" (1/1) ... [2020-09-24 17:13:07,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab12f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:07, skipping insertion in model container [2020-09-24 17:13:07,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:13:07" (1/1) ... [2020-09-24 17:13:07,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:13:07,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:13:08,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:13:08,138 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:13:08,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:13:08,452 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:13:08,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08 WrapperNode [2020-09-24 17:13:08,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:13:08,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:13:08,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:13:08,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:13:08,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ... [2020-09-24 17:13:08,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:13:08,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:13:08,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:13:08,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:13:08,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (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 17:13:08,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:13:08,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:13:08,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 17:13:08,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:13:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 17:13:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:13:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:13:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 17:13:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:13:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:13:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:13:10,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:13:10,107 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:13:10,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:13:10 BoogieIcfgContainer [2020-09-24 17:13:10,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:13:10,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:13:10,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:13:10,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:13:10,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:13:07" (1/3) ... [2020-09-24 17:13:10,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:13:10, skipping insertion in model container [2020-09-24 17:13:10,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (2/3) ... [2020-09-24 17:13:10,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:13:10, skipping insertion in model container [2020-09-24 17:13:10,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:13:10" (3/3) ... [2020-09-24 17:13:10,128 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label31.c [2020-09-24 17:13:10,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:13:10,152 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:13:10,175 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:13:10,211 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:13:10,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:13:10,212 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:13:10,212 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:13:10,212 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:13:10,212 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:13:10,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:13:10,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:13:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 17:13:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-24 17:13:10,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:13:10,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:13:10,272 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:13:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:13:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1921303583, now seen corresponding path program 1 times [2020-09-24 17:13:10,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:13:10,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299682537] [2020-09-24 17:13:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:13:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:10,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:11,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:11,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:12,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:21,387 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:13:21,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-24 17:13:21,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 17:13:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10772 [2020-09-24 17:13:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:13:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 17:13:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 17:13:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-24 17:13:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:13:21,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:13:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:22,054 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:13:22,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:13:22,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:13:22,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 17:13:22,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:13:22,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:13:22,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:13:22,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:13:22,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:13:22,291 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 17:13:22,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299682537] [2020-09-24 17:13:22,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:13:22,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 17:13:22,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822486661] [2020-09-24 17:13:22,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:13:22,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:13:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:13:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:13:22,323 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 17:13:23,067 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 17:13:23,317 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 17:13:23,891 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 17:13:24,349 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 17:13:25,526 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 17:13:25,753 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 17:13:26,338 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 17:13:26,990 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 17:13:27,518 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 17:13:29,071 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-09-24 17:13:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:13:30,425 INFO L93 Difference]: Finished difference Result 1650 states and 2328 transitions. [2020-09-24 17:13:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 17:13:30,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 142 [2020-09-24 17:13:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:13:30,469 INFO L225 Difference]: With dead ends: 1650 [2020-09-24 17:13:30,470 INFO L226 Difference]: Without dead ends: 1000 [2020-09-24 17:13:30,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 17:13:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2020-09-24 17:13:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 897. [2020-09-24 17:13:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-09-24 17:13:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1070 transitions. [2020-09-24 17:13:30,606 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1070 transitions. Word has length 142 [2020-09-24 17:13:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:13:30,607 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1070 transitions. [2020-09-24 17:13:30,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:13:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1070 transitions. [2020-09-24 17:13:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-24 17:13:30,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:13:30,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:13:30,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:13:30,620 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:13:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:13:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash 444741187, now seen corresponding path program 1 times [2020-09-24 17:13:30,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:13:30,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127889091] [2020-09-24 17:13:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:13:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:30,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:31,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:33,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:33,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:34,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:37,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:39,947 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:13:39,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-09-24 17:13:39,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 17:13:39,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9279 [2020-09-24 17:13:39,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:13:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 17:13:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 17:13:39,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 17:13:39,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:13:40,380 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-09-24 17:13:40,535 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-09-24 17:13:40,659 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-09-24 17:13:40,799 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-09-24 17:13:40,926 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-09-24 17:13:41,172 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-24 17:13:41,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:13:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:42,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:13:42,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:13:42,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:13:42,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 17:13:42,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:13:42,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:13:42,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:13:42,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 17:13:42,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:13:42,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:13:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:42,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:42,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:13:42,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:13:42,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:13:42,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 17:13:42,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:13:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:13:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 17:13:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 17:13:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:13:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:13:42,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127889091] [2020-09-24 17:13:42,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:13:42,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 17:13:42,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101007680] [2020-09-24 17:13:42,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 17:13:42,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:13:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 17:13:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-24 17:13:42,485 INFO L87 Difference]: Start difference. First operand 897 states and 1070 transitions. Second operand 27 states. [2020-09-24 17:13:43,690 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 17:13:43,958 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 17:13:44,219 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 17:13:44,645 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-09-24 17:13:45,005 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 17:13:45,554 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-09-24 17:13:45,783 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-09-24 17:13:46,366 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 17:13:46,643 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 17:13:46,951 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 17:13:47,397 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-09-24 17:13:47,668 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-24 17:13:48,080 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-24 17:13:48,593 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 17:13:48,881 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 17:13:49,157 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 17:13:49,418 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-09-24 17:13:49,604 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-09-24 17:13:49,907 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-09-24 17:13:50,045 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-09-24 17:13:50,310 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-09-24 17:13:50,619 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-09-24 17:13:50,950 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 17:13:51,236 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 17:13:51,558 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 17:13:51,861 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-24 17:13:52,482 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 17:13:52,725 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 17:13:53,028 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 17:13:53,426 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 17:13:53,724 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-09-24 17:13:54,233 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-09-24 17:13:54,504 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-09-24 17:13:54,802 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 17:13:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:13:55,619 INFO L93 Difference]: Finished difference Result 3067 states and 3935 transitions. [2020-09-24 17:13:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 17:13:55,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 164 [2020-09-24 17:13:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:13:55,633 INFO L225 Difference]: With dead ends: 3067 [2020-09-24 17:13:55,633 INFO L226 Difference]: Without dead ends: 2245 [2020-09-24 17:13:55,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1507, Invalid=3605, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 17:13:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-09-24 17:13:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 1840. [2020-09-24 17:13:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1840 states. [2020-09-24 17:13:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2251 transitions. [2020-09-24 17:13:55,722 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2251 transitions. Word has length 164 [2020-09-24 17:13:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:13:55,723 INFO L479 AbstractCegarLoop]: Abstraction has 1840 states and 2251 transitions. [2020-09-24 17:13:55,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 17:13:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2251 transitions. [2020-09-24 17:13:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-24 17:13:55,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:13:55,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:13:55,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:13:55,732 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:13:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:13:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 66852590, now seen corresponding path program 1 times [2020-09-24 17:13:55,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:13:55,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188935194] [2020-09-24 17:13:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:13:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:13:55,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:59,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:13:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking...