/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:35,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:35,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:35,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:08:35,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:08:35,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:08:35,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:08:35,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:08:35,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:08:35,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:08:35,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:08:35,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:08:35,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:08:35,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:08:35,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:08:35,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:08:35,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:08:35,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:08:35,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:08:35,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:08:35,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:08:35,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:08:35,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:08:35,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:08:35,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:08:35,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:35,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:35,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:35,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:08:35,645 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:35,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:35,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:35,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:35,647 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:35,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:35,648 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:35,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:35,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:35,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:35,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:35,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:35,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:35,650 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:35,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:35,651 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:35,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:35,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:35,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:35,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:35,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:35,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:35,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:35,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:35,931 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:35,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:35,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:35,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:35,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:35,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-11-06 19:08:36,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb291e2f6/dcac61fb589242fd98af0a79f60d7bec/FLAG413d6c03f [2019-11-06 19:08:36,659 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:36,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-11-06 19:08:36,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb291e2f6/dcac61fb589242fd98af0a79f60d7bec/FLAG413d6c03f [2019-11-06 19:08:36,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb291e2f6/dcac61fb589242fd98af0a79f60d7bec [2019-11-06 19:08:36,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:36,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:36,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:36,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:36,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:36,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:36" (1/1) ... [2019-11-06 19:08:36,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59873e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:36, skipping insertion in model container [2019-11-06 19:08:36,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:36" (1/1) ... [2019-11-06 19:08:36,895 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:36,955 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:37,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:37,693 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:37,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:37,869 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:37,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37 WrapperNode [2019-11-06 19:08:37,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:37,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:37,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:37,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:37,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:37,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:37,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:37,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:37,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:37,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:38,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... [2019-11-06 19:08:38,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:38,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:38,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:38,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:38,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-11-06 19:08:38,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:38,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:38,115 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:38,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:38,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:38,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:38,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:38,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:40,072 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:40,073 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:40,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:40 BoogieIcfgContainer [2019-11-06 19:08:40,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:40,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:40,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:40,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:40,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:36" (1/3) ... [2019-11-06 19:08:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a92c6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:40, skipping insertion in model container [2019-11-06 19:08:40,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:37" (2/3) ... [2019-11-06 19:08:40,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a92c6cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:40, skipping insertion in model container [2019-11-06 19:08:40,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:40" (3/3) ... [2019-11-06 19:08:40,094 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label21.c [2019-11-06 19:08:40,104 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:40,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:40,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:40,170 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:40,170 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:40,172 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:40,172 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:40,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:40,172 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:40,173 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:40,173 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 19:08:40,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:40,220 INFO L410 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] [2019-11-06 19:08:40,222 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1029260131, now seen corresponding path program 1 times [2019-11-06 19:08:40,233 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:40,233 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163790329] [2019-11-06 19:08:40,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:40,557 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163790329] [2019-11-06 19:08:40,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:40,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:40,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289219055] [2019-11-06 19:08:40,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:40,566 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:40,585 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:44,209 INFO L93 Difference]: Finished difference Result 990 states and 1774 transitions. [2019-11-06 19:08:44,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:44,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-06 19:08:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:44,233 INFO L225 Difference]: With dead ends: 990 [2019-11-06 19:08:44,233 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 19:08:44,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 19:08:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2019-11-06 19:08:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-06 19:08:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2019-11-06 19:08:44,343 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 30 [2019-11-06 19:08:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:44,343 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2019-11-06 19:08:44,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2019-11-06 19:08:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 19:08:44,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:44,349 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:44,349 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -27309419, now seen corresponding path program 1 times [2019-11-06 19:08:44,350 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:44,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907866716] [2019-11-06 19:08:44,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:44,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907866716] [2019-11-06 19:08:44,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258566974] [2019-11-06 19:08:44,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:44,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:44,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:44,961 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:44,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366713669] [2019-11-06 19:08:44,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:44,965 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:44,966 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states. [2019-11-06 19:08:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:46,026 INFO L93 Difference]: Finished difference Result 1826 states and 2564 transitions. [2019-11-06 19:08:46,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:46,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2019-11-06 19:08:46,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:46,036 INFO L225 Difference]: With dead ends: 1826 [2019-11-06 19:08:46,036 INFO L226 Difference]: Without dead ends: 1207 [2019-11-06 19:08:46,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-11-06 19:08:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197. [2019-11-06 19:08:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2019-11-06 19:08:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions. [2019-11-06 19:08:46,127 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 103 [2019-11-06 19:08:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:46,132 INFO L462 AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions. [2019-11-06 19:08:46,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions. [2019-11-06 19:08:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 19:08:46,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:46,139 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:46,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:46,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1916245598, now seen corresponding path program 1 times [2019-11-06 19:08:46,347 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:46,347 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507211680] [2019-11-06 19:08:46,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:46,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507211680] [2019-11-06 19:08:46,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785944846] [2019-11-06 19:08:46,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:46,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:46,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:46,794 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:46,794 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:08:46,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614569920] [2019-11-06 19:08:46,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:46,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:46,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:08:46,805 INFO L87 Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 5 states. [2019-11-06 19:08:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:48,421 INFO L93 Difference]: Finished difference Result 2626 states and 3466 transitions. [2019-11-06 19:08:48,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:08:48,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2019-11-06 19:08:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:48,431 INFO L225 Difference]: With dead ends: 2626 [2019-11-06 19:08:48,431 INFO L226 Difference]: Without dead ends: 1435 [2019-11-06 19:08:48,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-11-06 19:08:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1416. [2019-11-06 19:08:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2019-11-06 19:08:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1825 transitions. [2019-11-06 19:08:48,485 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1825 transitions. Word has length 104 [2019-11-06 19:08:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:48,486 INFO L462 AbstractCegarLoop]: Abstraction has 1416 states and 1825 transitions. [2019-11-06 19:08:48,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1825 transitions. [2019-11-06 19:08:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 19:08:48,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:48,491 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:48,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:48,703 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:48,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1980771380, now seen corresponding path program 1 times [2019-11-06 19:08:48,704 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:48,704 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272919114] [2019-11-06 19:08:48,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:49,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272919114] [2019-11-06 19:08:49,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459215024] [2019-11-06 19:08:49,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:49,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:49,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:49,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:49,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:49,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350107272] [2019-11-06 19:08:49,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:49,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:49,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:49,134 INFO L87 Difference]: Start difference. First operand 1416 states and 1825 transitions. Second operand 3 states. [2019-11-06 19:08:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:50,209 INFO L93 Difference]: Finished difference Result 3607 states and 4769 transitions. [2019-11-06 19:08:50,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:50,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-06 19:08:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:50,221 INFO L225 Difference]: With dead ends: 3607 [2019-11-06 19:08:50,221 INFO L226 Difference]: Without dead ends: 2197 [2019-11-06 19:08:50,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2019-11-06 19:08:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1995. [2019-11-06 19:08:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1995 states. [2019-11-06 19:08:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2622 transitions. [2019-11-06 19:08:50,283 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2622 transitions. Word has length 161 [2019-11-06 19:08:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:50,284 INFO L462 AbstractCegarLoop]: Abstraction has 1995 states and 2622 transitions. [2019-11-06 19:08:50,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2622 transitions. [2019-11-06 19:08:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-06 19:08:50,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:50,288 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:50,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:50,491 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 943896253, now seen corresponding path program 1 times [2019-11-06 19:08:50,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:50,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484367145] [2019-11-06 19:08:50,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 46 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:08:50,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484367145] [2019-11-06 19:08:50,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713144706] [2019-11-06 19:08:50,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:50,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:08:50,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 19:08:50,996 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:50,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:08:50,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560807852] [2019-11-06 19:08:50,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:50,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:50,998 INFO L87 Difference]: Start difference. First operand 1995 states and 2622 transitions. Second operand 5 states. [2019-11-06 19:08:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:52,790 INFO L93 Difference]: Finished difference Result 4832 states and 6597 transitions. [2019-11-06 19:08:52,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:52,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-11-06 19:08:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:52,808 INFO L225 Difference]: With dead ends: 4832 [2019-11-06 19:08:52,809 INFO L226 Difference]: Without dead ends: 2843 [2019-11-06 19:08:52,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2019-11-06 19:08:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2805. [2019-11-06 19:08:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2805 states. [2019-11-06 19:08:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 3710 transitions. [2019-11-06 19:08:52,950 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 3710 transitions. Word has length 176 [2019-11-06 19:08:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:52,956 INFO L462 AbstractCegarLoop]: Abstraction has 2805 states and 3710 transitions. [2019-11-06 19:08:52,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 3710 transitions. [2019-11-06 19:08:52,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-06 19:08:52,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:52,964 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:53,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:53,169 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2096041879, now seen corresponding path program 1 times [2019-11-06 19:08:53,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:53,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187916060] [2019-11-06 19:08:53,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:53,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187916060] [2019-11-06 19:08:53,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270551802] [2019-11-06 19:08:53,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 19:08:53,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:53,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:53,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:53,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:54,118 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 48 [2019-11-06 19:08:54,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:54,324 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:54,324 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-11-06 19:08:54,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179548928] [2019-11-06 19:08:54,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:08:54,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:08:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:54,329 INFO L87 Difference]: Start difference. First operand 2805 states and 3710 transitions. Second operand 13 states. [2019-11-06 19:09:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:06,673 INFO L93 Difference]: Finished difference Result 15530 states and 22816 transitions. [2019-11-06 19:09:06,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-06 19:09:06,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 220 [2019-11-06 19:09:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:06,750 INFO L225 Difference]: With dead ends: 15530 [2019-11-06 19:09:06,750 INFO L226 Difference]: Without dead ends: 12919 [2019-11-06 19:09:06,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=713, Invalid=2593, Unknown=0, NotChecked=0, Total=3306 [2019-11-06 19:09:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12919 states. [2019-11-06 19:09:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 10316. [2019-11-06 19:09:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10316 states. [2019-11-06 19:09:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10316 states to 10316 states and 13348 transitions. [2019-11-06 19:09:07,146 INFO L78 Accepts]: Start accepts. Automaton has 10316 states and 13348 transitions. Word has length 220 [2019-11-06 19:09:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:07,147 INFO L462 AbstractCegarLoop]: Abstraction has 10316 states and 13348 transitions. [2019-11-06 19:09:07,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:09:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10316 states and 13348 transitions. [2019-11-06 19:09:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2019-11-06 19:09:07,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:07,165 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:09:07,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:07,370 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash -675949199, now seen corresponding path program 1 times [2019-11-06 19:09:07,372 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:07,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925018068] [2019-11-06 19:09:07,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-06 19:09:07,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925018068] [2019-11-06 19:09:07,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451944268] [2019-11-06 19:09:07,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:08,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-11-06 19:09:08,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:08,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:09:08,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81828513] [2019-11-06 19:09:08,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:08,120 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:08,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:08,121 INFO L87 Difference]: Start difference. First operand 10316 states and 13348 transitions. Second operand 3 states. [2019-11-06 19:09:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:09,300 INFO L93 Difference]: Finished difference Result 22331 states and 29475 transitions. [2019-11-06 19:09:09,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:09,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2019-11-06 19:09:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:09,351 INFO L225 Difference]: With dead ends: 22331 [2019-11-06 19:09:09,351 INFO L226 Difference]: Without dead ends: 12021 [2019-11-06 19:09:09,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12021 states. [2019-11-06 19:09:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 12021. [2019-11-06 19:09:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12021 states. [2019-11-06 19:09:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12021 states to 12021 states and 15690 transitions. [2019-11-06 19:09:09,637 INFO L78 Accepts]: Start accepts. Automaton has 12021 states and 15690 transitions. Word has length 325 [2019-11-06 19:09:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:09,638 INFO L462 AbstractCegarLoop]: Abstraction has 12021 states and 15690 transitions. [2019-11-06 19:09:09,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 12021 states and 15690 transitions. [2019-11-06 19:09:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2019-11-06 19:09:09,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:09,673 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:09:09,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:09,887 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1454489130, now seen corresponding path program 1 times [2019-11-06 19:09:09,887 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:09,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61390323] [2019-11-06 19:09:09,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-11-06 19:09:10,388 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61390323] [2019-11-06 19:09:10,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748784314] [2019-11-06 19:09:10,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:10,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:09:10,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 248 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-06 19:09:10,922 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:10,922 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 19:09:10,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387975726] [2019-11-06 19:09:10,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:09:10,924 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:09:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:10,925 INFO L87 Difference]: Start difference. First operand 12021 states and 15690 transitions. Second operand 7 states.