/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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:09:36,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:09:36,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:09:36,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:09:36,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:09:36,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:09:36,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:09:36,965 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 19:09:36,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:09:36,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:09:37,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:09:37,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:09:37,001 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:09:37,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:09:37,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:09:37,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:09:37,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:09:37,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:09:37,004 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:09:37,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:09:37,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:09:37,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:09:37,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:09:37,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:09:37,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:37,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:09:37,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:09:37,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:09:37,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:09:37,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:09:37,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:09:37,314 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:09:37,315 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-11-06 19:09:37,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a7678e/5e95e06394c740e2a3dc2130e78e81b7/FLAG9626a3bbe [2019-11-06 19:09:37,967 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:09:37,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-11-06 19:09:37,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a7678e/5e95e06394c740e2a3dc2130e78e81b7/FLAG9626a3bbe [2019-11-06 19:09:38,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a7678e/5e95e06394c740e2a3dc2130e78e81b7 [2019-11-06 19:09:38,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:09:38,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:09:38,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:38,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:09:38,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:09:38,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:38" (1/1) ... [2019-11-06 19:09:38,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39efa35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:38, skipping insertion in model container [2019-11-06 19:09:38,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:38" (1/1) ... [2019-11-06 19:09:38,244 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:09:38,313 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:09:39,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:39,042 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:09:39,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:39,364 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:09:39,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39 WrapperNode [2019-11-06 19:09:39,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:39,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:09:39,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:09:39,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:09:39,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (1/1) ... [2019-11-06 19:09:39,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:09:39,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:09:39,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:09:39,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:09:39,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (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 19:09:39,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:09:39,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:09:39,653 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:09:39,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:09:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:09:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:09:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:41,712 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:41,713 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:41,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:41 BoogieIcfgContainer [2019-11-06 19:09:41,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:41,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:41,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:41,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:41,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:09:38" (1/3) ... [2019-11-06 19:09:41,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8010d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:41, skipping insertion in model container [2019-11-06 19:09:41,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:39" (2/3) ... [2019-11-06 19:09:41,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8010d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:41, skipping insertion in model container [2019-11-06 19:09:41,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:41" (3/3) ... [2019-11-06 19:09:41,733 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label38.c [2019-11-06 19:09:41,746 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:41,756 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:41,768 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:41,806 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:41,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:41,807 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:41,807 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:41,807 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:41,807 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:41,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:41,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 19:09:41,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:41,853 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] [2019-11-06 19:09:41,855 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1782601651, now seen corresponding path program 1 times [2019-11-06 19:09:41,871 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:41,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442403707] [2019-11-06 19:09:41,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:42,412 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 19:09:42,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442403707] [2019-11-06 19:09:42,414 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:42,414 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:42,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797493578] [2019-11-06 19:09:42,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:42,421 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:42,438 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:09:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:45,686 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2019-11-06 19:09:45,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:45,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-11-06 19:09:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:45,709 INFO L225 Difference]: With dead ends: 998 [2019-11-06 19:09:45,709 INFO L226 Difference]: Without dead ends: 638 [2019-11-06 19:09:45,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-06 19:09:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2019-11-06 19:09:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-06 19:09:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2019-11-06 19:09:45,826 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 66 [2019-11-06 19:09:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:45,827 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2019-11-06 19:09:45,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2019-11-06 19:09:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 19:09:45,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:45,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:45,836 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -271473866, now seen corresponding path program 1 times [2019-11-06 19:09:45,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:45,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552081605] [2019-11-06 19:09:45,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:46,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552081605] [2019-11-06 19:09:46,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:46,295 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:09:46,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34524024] [2019-11-06 19:09:46,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:46,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:46,301 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states. [2019-11-06 19:09:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:50,048 INFO L93 Difference]: Finished difference Result 2487 states and 4246 transitions. [2019-11-06 19:09:50,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:09:50,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-11-06 19:09:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:50,075 INFO L225 Difference]: With dead ends: 2487 [2019-11-06 19:09:50,076 INFO L226 Difference]: Without dead ends: 1872 [2019-11-06 19:09:50,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:09:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2019-11-06 19:09:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816. [2019-11-06 19:09:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-11-06 19:09:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions. [2019-11-06 19:09:50,213 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 136 [2019-11-06 19:09:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:50,216 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions. [2019-11-06 19:09:50,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions. [2019-11-06 19:09:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 19:09:50,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:50,227 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, 1, 1, 1, 1, 1, 1, 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 19:09:50,227 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1985877122, now seen corresponding path program 1 times [2019-11-06 19:09:50,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:50,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191653707] [2019-11-06 19:09:50,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:50,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191653707] [2019-11-06 19:09:50,589 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:50,590 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:09:50,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294189763] [2019-11-06 19:09:50,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:50,591 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:50,592 INFO L87 Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states. [2019-11-06 19:09:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:53,550 INFO L93 Difference]: Finished difference Result 5266 states and 7935 transitions. [2019-11-06 19:09:53,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:09:53,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 146 [2019-11-06 19:09:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:53,584 INFO L225 Difference]: With dead ends: 5266 [2019-11-06 19:09:53,584 INFO L226 Difference]: Without dead ends: 3456 [2019-11-06 19:09:53,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:09:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2019-11-06 19:09:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 3233. [2019-11-06 19:09:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2019-11-06 19:09:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4503 transitions. [2019-11-06 19:09:53,730 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4503 transitions. Word has length 146 [2019-11-06 19:09:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:53,731 INFO L462 AbstractCegarLoop]: Abstraction has 3233 states and 4503 transitions. [2019-11-06 19:09:53,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4503 transitions. [2019-11-06 19:09:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-06 19:09:53,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:53,737 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:53,737 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1482166744, now seen corresponding path program 1 times [2019-11-06 19:09:53,738 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:53,738 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280090088] [2019-11-06 19:09:53,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:54,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280090088] [2019-11-06 19:09:54,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465966586] [2019-11-06 19:09:54,118 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 19:09:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:54,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:09:54,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:54,308 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:54,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:09:54,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808338231] [2019-11-06 19:09:54,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:54,309 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:54,310 INFO L87 Difference]: Start difference. First operand 3233 states and 4503 transitions. Second operand 8 states. [2019-11-06 19:09:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:56,867 INFO L93 Difference]: Finished difference Result 6540 states and 9940 transitions. [2019-11-06 19:09:56,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:09:56,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 209 [2019-11-06 19:09:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:56,890 INFO L225 Difference]: With dead ends: 6540 [2019-11-06 19:09:56,891 INFO L226 Difference]: Without dead ends: 3313 [2019-11-06 19:09:56,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:09:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-11-06 19:09:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993. [2019-11-06 19:09:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2019-11-06 19:09:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3904 transitions. [2019-11-06 19:09:57,020 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3904 transitions. Word has length 209 [2019-11-06 19:09:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:57,022 INFO L462 AbstractCegarLoop]: Abstraction has 2993 states and 3904 transitions. [2019-11-06 19:09:57,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3904 transitions. [2019-11-06 19:09:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 19:09:57,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:57,027 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:57,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:57,233 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1232021260, now seen corresponding path program 1 times [2019-11-06 19:09:57,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:57,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638415438] [2019-11-06 19:09:57,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:09:57,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638415438] [2019-11-06 19:09:57,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833935203] [2019-11-06 19:09:57,552 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 19:09:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:57,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:57,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:09:57,784 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:57,784 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:09:57,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107343270] [2019-11-06 19:09:57,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:57,785 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:57,786 INFO L87 Difference]: Start difference. First operand 2993 states and 3904 transitions. Second operand 3 states. [2019-11-06 19:09:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:58,909 INFO L93 Difference]: Finished difference Result 7515 states and 10042 transitions. [2019-11-06 19:09:58,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:58,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-11-06 19:09:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:58,932 INFO L225 Difference]: With dead ends: 7515 [2019-11-06 19:09:58,932 INFO L226 Difference]: Without dead ends: 4528 [2019-11-06 19:09:58,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2019-11-06 19:09:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 4528. [2019-11-06 19:09:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4528 states. [2019-11-06 19:09:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5974 transitions. [2019-11-06 19:09:59,054 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5974 transitions. Word has length 219 [2019-11-06 19:09:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:59,055 INFO L462 AbstractCegarLoop]: Abstraction has 4528 states and 5974 transitions. [2019-11-06 19:09:59,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5974 transitions. [2019-11-06 19:09:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 19:09:59,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:59,063 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:59,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:59,275 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash 495099250, now seen corresponding path program 1 times [2019-11-06 19:09:59,276 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:59,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763262859] [2019-11-06 19:09:59,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:59,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763262859] [2019-11-06 19:09:59,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603369713] [2019-11-06 19:09:59,655 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 19:09:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:59,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:59,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 19:09:59,908 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:59,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-11-06 19:09:59,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112051791] [2019-11-06 19:09:59,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:59,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:09:59,911 INFO L87 Difference]: Start difference. First operand 4528 states and 5974 transitions. Second operand 5 states. [2019-11-06 19:10:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:01,492 INFO L93 Difference]: Finished difference Result 9113 states and 12144 transitions. [2019-11-06 19:10:01,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:01,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2019-11-06 19:10:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:01,516 INFO L225 Difference]: With dead ends: 9113 [2019-11-06 19:10:01,516 INFO L226 Difference]: Without dead ends: 4591 [2019-11-06 19:10:01,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:10:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2019-11-06 19:10:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4548. [2019-11-06 19:10:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4548 states. [2019-11-06 19:10:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 6010 transitions. [2019-11-06 19:10:01,648 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 6010 transitions. Word has length 241 [2019-11-06 19:10:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:01,648 INFO L462 AbstractCegarLoop]: Abstraction has 4548 states and 6010 transitions. [2019-11-06 19:10:01,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 6010 transitions. [2019-11-06 19:10:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-11-06 19:10:01,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:01,657 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, 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, 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] [2019-11-06 19:10:01,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:01,860 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1895970792, now seen corresponding path program 1 times [2019-11-06 19:10:01,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:01,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612998034] [2019-11-06 19:10:01,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 19:10:02,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612998034] [2019-11-06 19:10:02,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432503786] [2019-11-06 19:10:02,443 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 19:10:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:10:02,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:02,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:02,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:08,480 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2019-11-06 19:10:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 19:10:08,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:10:08,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-11-06 19:10:08,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544909234] [2019-11-06 19:10:08,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:10:08,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:10:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2019-11-06 19:10:08,599 INFO L87 Difference]: Start difference. First operand 4548 states and 6010 transitions. Second operand 11 states.