/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/Problem03_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:01:36,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:01:36,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:01:36,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:01:36,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:01:36,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:01:36,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:01:36,560 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 19:01:36,575 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:01:36,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:01:36,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:01:36,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:01:36,576 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:01:36,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:01:36,577 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:01:36,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:01:36,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:01:36,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:01:36,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:01:36,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:01:36,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:01:36,578 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:01:36,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:01:36,579 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:01:36,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:01:36,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:01:36,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:01:36,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:01:36,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:01:36,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:01:36,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:01:36,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:01:36,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:01:36,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:01:36,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:01:36,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:01:36,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:01:36,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:01:36,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:01:36,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:01:36,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:01:36,915 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:01:36,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-11-06 19:01:36,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e607244/155c141d7d52443a90a0b558a1117829/FLAGb659c388c [2019-11-06 19:01:37,674 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:01:37,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-11-06 19:01:37,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e607244/155c141d7d52443a90a0b558a1117829/FLAGb659c388c [2019-11-06 19:01:37,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e607244/155c141d7d52443a90a0b558a1117829 [2019-11-06 19:01:37,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:01:37,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:01:37,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:37,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:01:37,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:01:37,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:37" (1/1) ... [2019-11-06 19:01:37,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:37, skipping insertion in model container [2019-11-06 19:01:37,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:37" (1/1) ... [2019-11-06 19:01:37,866 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:01:37,952 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:01:38,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:38,793 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:01:39,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:39,235 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:01:39,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39 WrapperNode [2019-11-06 19:01:39,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:39,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:01:39,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:01:39,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:01:39,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (1/1) ... [2019-11-06 19:01:39,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:01:39,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:01:39,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:01:39,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:01:39,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (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 19:01:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:01:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:01:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:01:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:01:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:01:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:01:41,526 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:01:41,527 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:01:41,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:41 BoogieIcfgContainer [2019-11-06 19:01:41,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:01:41,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:01:41,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:01:41,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:01:41,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:01:37" (1/3) ... [2019-11-06 19:01:41,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20761515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:41, skipping insertion in model container [2019-11-06 19:01:41,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:39" (2/3) ... [2019-11-06 19:01:41,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20761515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:41, skipping insertion in model container [2019-11-06 19:01:41,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:41" (3/3) ... [2019-11-06 19:01:41,537 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2019-11-06 19:01:41,547 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:01:41,555 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:01:41,567 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:01:41,596 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:01:41,596 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:01:41,596 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:01:41,596 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:01:41,596 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:01:41,597 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:01:41,597 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:01:41,597 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:01:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:01:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-06 19:01:41,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:41,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:41,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:41,647 INFO L82 PathProgramCache]: Analyzing trace with hash -629671171, now seen corresponding path program 1 times [2019-11-06 19:01:41,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:41,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904471019] [2019-11-06 19:01:41,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,505 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,658 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 19:01:42,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904471019] [2019-11-06 19:01:42,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:42,659 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:01:42,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378265106] [2019-11-06 19:01:42,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:42,667 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:42,683 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:01:42,915 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:43,448 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:47,248 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-11-06 19:01:47,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:47,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-11-06 19:01:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:47,286 INFO L225 Difference]: With dead ends: 1107 [2019-11-06 19:01:47,286 INFO L226 Difference]: Without dead ends: 699 [2019-11-06 19:01:47,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-06 19:01:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-11-06 19:01:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-11-06 19:01:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-11-06 19:01:47,420 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 172 [2019-11-06 19:01:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:47,421 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-11-06 19:01:47,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-11-06 19:01:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-06 19:01:47,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:47,432 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 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 19:01:47,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1631480425, now seen corresponding path program 1 times [2019-11-06 19:01:47,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:47,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966255990] [2019-11-06 19:01:47,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:47,803 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:47,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966255990] [2019-11-06 19:01:47,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396440080] [2019-11-06 19:01:47,980 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 19:01:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:48,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:48,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:48,363 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:48,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:01:48,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667881929] [2019-11-06 19:01:48,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:48,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:48,366 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-11-06 19:01:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:49,502 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-11-06 19:01:49,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:49,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-11-06 19:01:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:49,510 INFO L225 Difference]: With dead ends: 1364 [2019-11-06 19:01:49,510 INFO L226 Difference]: Without dead ends: 896 [2019-11-06 19:01:49,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-11-06 19:01:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-11-06 19:01:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-06 19:01:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-11-06 19:01:49,561 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 184 [2019-11-06 19:01:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:49,564 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-11-06 19:01:49,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-11-06 19:01:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-06 19:01:49,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:49,574 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:49,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:49,778 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1138801162, now seen corresponding path program 1 times [2019-11-06 19:01:49,780 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:49,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636423722] [2019-11-06 19:01:49,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,148 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:50,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636423722] [2019-11-06 19:01:50,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:50,423 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:50,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894363898] [2019-11-06 19:01:50,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:50,425 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:50,434 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-11-06 19:01:50,597 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:51,166 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:54,015 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-11-06 19:01:54,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:01:54,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 199 [2019-11-06 19:01:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:54,030 INFO L225 Difference]: With dead ends: 2246 [2019-11-06 19:01:54,031 INFO L226 Difference]: Without dead ends: 1358 [2019-11-06 19:01:54,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:01:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-11-06 19:01:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-11-06 19:01:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-11-06 19:01:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-11-06 19:01:54,109 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 199 [2019-11-06 19:01:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:54,109 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-11-06 19:01:54,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-11-06 19:01:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-06 19:01:54,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:54,116 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:54,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1137241398, now seen corresponding path program 1 times [2019-11-06 19:01:54,117 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:54,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285805636] [2019-11-06 19:01:54,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:54,429 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:54,788 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285805636] [2019-11-06 19:01:54,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:54,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:54,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935537713] [2019-11-06 19:01:54,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:54,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:54,790 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-11-06 19:01:54,951 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:55,540 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:01:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:58,496 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-11-06 19:01:58,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:01:58,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2019-11-06 19:01:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:58,515 INFO L225 Difference]: With dead ends: 4018 [2019-11-06 19:01:58,515 INFO L226 Difference]: Without dead ends: 2692 [2019-11-06 19:01:58,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:01:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-11-06 19:01:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-11-06 19:01:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:01:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3621 transitions. [2019-11-06 19:01:58,620 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3621 transitions. Word has length 206 [2019-11-06 19:01:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:58,620 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3621 transitions. [2019-11-06 19:01:58,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3621 transitions. [2019-11-06 19:01:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-06 19:01:58,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:58,630 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:58,630 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash 928057599, now seen corresponding path program 1 times [2019-11-06 19:01:58,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:58,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768791488] [2019-11-06 19:01:58,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:58,852 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:01:59,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768791488] [2019-11-06 19:01:59,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148795453] [2019-11-06 19:01:59,044 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 19:01:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:59,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:59,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:01:59,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:59,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:01:59,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145420510] [2019-11-06 19:01:59,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:59,348 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:59,349 INFO L87 Difference]: Start difference. First operand 2654 states and 3621 transitions. Second operand 3 states. [2019-11-06 19:02:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:00,275 INFO L93 Difference]: Finished difference Result 5304 states and 7255 transitions. [2019-11-06 19:02:00,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:02:00,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-11-06 19:02:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:00,293 INFO L225 Difference]: With dead ends: 5304 [2019-11-06 19:02:00,294 INFO L226 Difference]: Without dead ends: 2656 [2019-11-06 19:02:00,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:02:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-11-06 19:02:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-11-06 19:02:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-06 19:02:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3494 transitions. [2019-11-06 19:02:00,385 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3494 transitions. Word has length 208 [2019-11-06 19:02:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:00,386 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3494 transitions. [2019-11-06 19:02:00,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:02:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3494 transitions. [2019-11-06 19:02:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-06 19:02:00,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:00,395 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:00,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:00,603 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1369505429, now seen corresponding path program 1 times [2019-11-06 19:02:00,604 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:00,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191142200] [2019-11-06 19:02:00,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:01,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191142200] [2019-11-06 19:02:01,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652325218] [2019-11-06 19:02:01,036 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 19:02:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:01,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:02:01,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:01,299 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:01,300 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:02:01,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736061533] [2019-11-06 19:02:01,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:02:01,301 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:01,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:02:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:02:01,302 INFO L87 Difference]: Start difference. First operand 2654 states and 3494 transitions. Second operand 3 states. [2019-11-06 19:02:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:02,422 INFO L93 Difference]: Finished difference Result 7854 states and 10601 transitions. [2019-11-06 19:02:02,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:02:02,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-11-06 19:02:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:02,451 INFO L225 Difference]: With dead ends: 7854 [2019-11-06 19:02:02,452 INFO L226 Difference]: Without dead ends: 5206 [2019-11-06 19:02:02,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:02:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-11-06 19:02:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-11-06 19:02:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-11-06 19:02:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6853 transitions. [2019-11-06 19:02:02,588 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6853 transitions. Word has length 217 [2019-11-06 19:02:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:02,589 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6853 transitions. [2019-11-06 19:02:02,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:02:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6853 transitions. [2019-11-06 19:02:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-06 19:02:02,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:02,605 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:02:02,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:02,810 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash 233125280, now seen corresponding path program 1 times [2019-11-06 19:02:02,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:02,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179301096] [2019-11-06 19:02:02,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:03,020 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:02:03,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179301096] [2019-11-06 19:02:03,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681381892] [2019-11-06 19:02:03,230 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 19:02:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:03,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:02:03,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 19:02:03,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:02:03,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:02:03,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331134091] [2019-11-06 19:02:03,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:02:03,502 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:02:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:02:03,502 INFO L87 Difference]: Start difference. First operand 5200 states and 6853 transitions. Second operand 5 states. [2019-11-06 19:02:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:04,865 INFO L93 Difference]: Finished difference Result 10482 states and 14338 transitions. [2019-11-06 19:02:04,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:02:04,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-11-06 19:02:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:04,890 INFO L225 Difference]: With dead ends: 10482 [2019-11-06 19:02:04,891 INFO L226 Difference]: Without dead ends: 5288 [2019-11-06 19:02:04,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:02:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-11-06 19:02:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-11-06 19:02:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-11-06 19:02:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6777 transitions. [2019-11-06 19:02:05,049 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6777 transitions. Word has length 223 [2019-11-06 19:02:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:05,050 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6777 transitions. [2019-11-06 19:02:05,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:02:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6777 transitions. [2019-11-06 19:02:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-06 19:02:05,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:05,068 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:02:05,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:05,281 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1873774260, now seen corresponding path program 1 times [2019-11-06 19:02:05,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:05,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400364259] [2019-11-06 19:02:05,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,496 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:02:05,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400364259] [2019-11-06 19:02:05,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173560612] [2019-11-06 19:02:05,700 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 19:02:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:05,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:02:05,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:02:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:02:06,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:02:06,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:02:06,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497512416] [2019-11-06 19:02:06,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:02:06,017 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:02:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:02:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:02:06,018 INFO L87 Difference]: Start difference. First operand 5216 states and 6777 transitions. Second operand 11 states. [2019-11-06 19:02:06,221 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:02:06,617 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-11-06 19:02:08,866 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:02:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:02:10,966 INFO L93 Difference]: Finished difference Result 15091 states and 22093 transitions. [2019-11-06 19:02:10,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:02:10,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 235 [2019-11-06 19:02:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:02:11,036 INFO L225 Difference]: With dead ends: 15091 [2019-11-06 19:02:11,036 INFO L226 Difference]: Without dead ends: 9881 [2019-11-06 19:02:11,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:02:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2019-11-06 19:02:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 9602. [2019-11-06 19:02:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9602 states. [2019-11-06 19:02:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 12280 transitions. [2019-11-06 19:02:11,588 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 12280 transitions. Word has length 235 [2019-11-06 19:02:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:02:11,588 INFO L462 AbstractCegarLoop]: Abstraction has 9602 states and 12280 transitions. [2019-11-06 19:02:11,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:02:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 12280 transitions. [2019-11-06 19:02:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 19:02:11,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:02:11,613 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, 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, 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] [2019-11-06 19:02:11,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:02:11,826 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:02:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:02:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1051688855, now seen corresponding path program 1 times [2019-11-06 19:02:11,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:02:11,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20728642] [2019-11-06 19:02:11,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:02:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:12,212 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:02:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:02:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:02:12,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20728642] [2019-11-06 19:02:12,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743096234] [2019-11-06 19:02:12,420 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