/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:16:51,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:16:51,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:16:51,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:16:51,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:16:51,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:16:51,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:16:51,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:16:51,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:16:51,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:16:51,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:16:51,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:16:51,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:16:51,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:16:51,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:16:51,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:16:51,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:16:51,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:16:51,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:16:51,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:16:51,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:16:51,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:16:51,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:16:51,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:16:51,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:16:51,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:16:51,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:16:51,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:16:51,577 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 [2019-11-23 20:16:51,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:16:51,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:16:51,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:16:51,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:16:51,604 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:16:51,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:16:51,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:16:51,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:16:51,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:16:51,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:16:51,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:16:51,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:16:51,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:16:51,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:16:51,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:16:51,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:16:51,608 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:16:51,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:16:51,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:16:51,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:16:51,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:16:51,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:16:51,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:16:51,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:16:51,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:16:51,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:16:51,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:16:51,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:16:51,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:16:51,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:16:51,898 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:16:51,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:16:51,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:16:51,925 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:16:51,926 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:16:51,927 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-11-23 20:16:51,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad271f876/820409aebedf4695916881eeb2144633/FLAG4fec6cc78 [2019-11-23 20:16:52,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:16:52,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-11-23 20:16:52,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad271f876/820409aebedf4695916881eeb2144633/FLAG4fec6cc78 [2019-11-23 20:16:52,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad271f876/820409aebedf4695916881eeb2144633 [2019-11-23 20:16:52,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:16:52,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:16:52,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:52,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:16:52,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:16:52,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:52" (1/1) ... [2019-11-23 20:16:52,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716e1c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:52, skipping insertion in model container [2019-11-23 20:16:52,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:52" (1/1) ... [2019-11-23 20:16:52,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:16:52,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:16:53,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:53,150 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:16:53,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:53,281 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:16:53,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53 WrapperNode [2019-11-23 20:16:53,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:53,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:53,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:16:53,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:16:53,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:53,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:16:53,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:16:53,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:16:53,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (1/1) ... [2019-11-23 20:16:53,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:16:53,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:16:53,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:16:53,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:16:53,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (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 [2019-11-23 20:16:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:16:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:16:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:16:53,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:16:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:16:53,806 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:16:53,806 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:16:53,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:53 BoogieIcfgContainer [2019-11-23 20:16:53,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:16:53,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:16:53,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:16:53,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:16:53,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:16:52" (1/3) ... [2019-11-23 20:16:53,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e61b15e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:53, skipping insertion in model container [2019-11-23 20:16:53,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:53" (2/3) ... [2019-11-23 20:16:53,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e61b15e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:53, skipping insertion in model container [2019-11-23 20:16:53,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:53" (3/3) ... [2019-11-23 20:16:53,819 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2019-11-23 20:16:53,828 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:16:53,835 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:16:53,845 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:16:53,867 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:16:53,868 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:16:53,868 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:16:53,868 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:16:53,868 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:16:53,868 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:16:53,868 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:16:53,869 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:16:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-23 20:16:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:16:53,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:53,888 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] [2019-11-23 20:16:53,888 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2019-11-23 20:16:53,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:53,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326076516] [2019-11-23 20:16:53,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:54,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326076516] [2019-11-23 20:16:54,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:54,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:16:54,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918547886] [2019-11-23 20:16:54,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:16:54,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:16:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:54,043 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-23 20:16:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,062 INFO L93 Difference]: Finished difference Result 69 states and 104 transitions. [2019-11-23 20:16:54,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:16:54,063 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-11-23 20:16:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,072 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:16:54,072 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:16:54,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:16:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:16:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:16:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-23 20:16:54,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2019-11-23 20:16:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,107 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-23 20:16:54,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:16:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-23 20:16:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:16:54,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,108 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] [2019-11-23 20:16:54,109 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2019-11-23 20:16:54,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637912544] [2019-11-23 20:16:54,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:54,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637912544] [2019-11-23 20:16:54,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:54,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:54,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217988399] [2019-11-23 20:16:54,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:54,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:54,234 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2019-11-23 20:16:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,326 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-11-23 20:16:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:54,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:16:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,329 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:16:54,329 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:16:54,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:16:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:16:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:16:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:16:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-11-23 20:16:54,340 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2019-11-23 20:16:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,341 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-11-23 20:16:54,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-11-23 20:16:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:16:54,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,342 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] [2019-11-23 20:16:54,343 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -807143506, now seen corresponding path program 1 times [2019-11-23 20:16:54,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747144503] [2019-11-23 20:16:54,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:16:54,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747144503] [2019-11-23 20:16:54,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:54,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:16:54,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596445916] [2019-11-23 20:16:54,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:16:54,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:16:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:54,406 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 3 states. [2019-11-23 20:16:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,511 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2019-11-23 20:16:54,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:16:54,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:16:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,512 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:16:54,512 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:16:54,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:16:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:16:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:16:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2019-11-23 20:16:54,521 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25 [2019-11-23 20:16:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,522 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2019-11-23 20:16:54,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:16:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2019-11-23 20:16:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:16:54,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,523 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] [2019-11-23 20:16:54,524 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash 293663568, now seen corresponding path program 1 times [2019-11-23 20:16:54,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594028014] [2019-11-23 20:16:54,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:16:54,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594028014] [2019-11-23 20:16:54,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:54,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:54,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845751358] [2019-11-23 20:16:54,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:54,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:54,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:54,623 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 4 states. [2019-11-23 20:16:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,778 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2019-11-23 20:16:54,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:54,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:16:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,781 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:16:54,781 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:16:54,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:16:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-11-23 20:16:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:16:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:16:54,796 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27 [2019-11-23 20:16:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,797 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:16:54,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:16:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:16:54,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,799 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] [2019-11-23 20:16:54,799 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2019-11-23 20:16:54,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:54,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478470644] [2019-11-23 20:16:54,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:16:54,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478470644] [2019-11-23 20:16:54,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607772409] [2019-11-23 20:16:54,893 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 [2019-11-23 20:16:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:54,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:54,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:16:55,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:55,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:16:55,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935397473] [2019-11-23 20:16:55,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:16:55,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:16:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:55,021 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2019-11-23 20:16:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:55,141 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2019-11-23 20:16:55,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:16:55,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-23 20:16:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:55,145 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:16:55,145 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:16:55,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:16:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-23 20:16:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:16:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 20:16:55,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2019-11-23 20:16:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:55,153 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 20:16:55,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:16:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 20:16:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:16:55,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:55,155 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:16:55,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:55,361 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2019-11-23 20:16:55,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:55,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059266893] [2019-11-23 20:16:55,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:16:55,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059266893] [2019-11-23 20:16:55,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579348684] [2019-11-23 20:16:55,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:16:55,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:55,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:55,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:55,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:16:55,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:55,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:16:55,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658906116] [2019-11-23 20:16:55,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:16:55,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:16:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:16:55,560 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2019-11-23 20:16:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:55,774 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2019-11-23 20:16:55,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:16:55,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-23 20:16:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:55,776 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:16:55,776 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:16:55,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:16:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:16:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-11-23 20:16:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:16:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-23 20:16:55,794 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2019-11-23 20:16:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:55,796 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-23 20:16:55,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:16:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-23 20:16:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:16:55,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:55,803 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:16:56,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:56,004 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2019-11-23 20:16:56,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:56,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469020484] [2019-11-23 20:16:56,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:59,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469020484] [2019-11-23 20:16:59,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109696281] [2019-11-23 20:16:59,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:16:59,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:16:59,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:59,088 WARN L253 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 88 conjunts are in the unsatisfiable core [2019-11-23 20:16:59,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:04,725 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:04,726 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:17:04,727 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:17:04,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:04,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:04,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:17:04,751 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:17:04,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:05,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:05,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:05,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:05,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 81 [2019-11-23 20:17:05,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54721819] [2019-11-23 20:17:05,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-11-23 20:17:05,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-11-23 20:17:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=6226, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 20:17:05,214 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 81 states. [2019-11-23 20:17:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:18,726 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2019-11-23 20:17:18,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 20:17:18,727 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 59 [2019-11-23 20:17:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:18,728 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:17:18,728 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:17:18,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 13 SyntacticMatches, 12 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=535, Invalid=13271, Unknown=0, NotChecked=0, Total=13806 [2019-11-23 20:17:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:17:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2019-11-23 20:17:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:17:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-23 20:17:18,755 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2019-11-23 20:17:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:18,755 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-23 20:17:18,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-11-23 20:17:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-23 20:17:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:17:18,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:18,757 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-23 20:17:18,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:18,963 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2019-11-23 20:17:18,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:18,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284422188] [2019-11-23 20:17:18,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:17:19,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284422188] [2019-11-23 20:17:19,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994679079] [2019-11-23 20:17:19,067 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-23 20:17:19,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:17:19,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:19,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:19,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:17:19,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:17:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353436273] [2019-11-23 20:17:19,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:17:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:17:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:17:19,183 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 13 states. [2019-11-23 20:17:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:19,573 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2019-11-23 20:17:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:17:19,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-11-23 20:17:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:19,575 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:17:19,575 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 20:17:19,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:17:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 20:17:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2019-11-23 20:17:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:17:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2019-11-23 20:17:19,587 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2019-11-23 20:17:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:19,587 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2019-11-23 20:17:19,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:17:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2019-11-23 20:17:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:17:19,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:19,589 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:19,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:19,793 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2019-11-23 20:17:19,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:19,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599069391] [2019-11-23 20:17:19,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:17:19,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599069391] [2019-11-23 20:17:19,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666293169] [2019-11-23 20:17:19,865 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-23 20:17:20,053 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:17:20,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:20,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:20,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:17:20,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:20,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:17:20,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776001871] [2019-11-23 20:17:20,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:17:20,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:17:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:17:20,118 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 13 states. [2019-11-23 20:17:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:20,485 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2019-11-23 20:17:20,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:17:20,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-11-23 20:17:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:20,486 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:17:20,486 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:17:20,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:17:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2019-11-23 20:17:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:17:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2019-11-23 20:17:20,494 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2019-11-23 20:17:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:20,494 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2019-11-23 20:17:20,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:17:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2019-11-23 20:17:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:17:20,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:20,496 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:20,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:20,703 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2019-11-23 20:17:20,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:20,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867970249] [2019-11-23 20:17:20,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:22,128 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2019-11-23 20:17:22,736 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-23 20:17:22,921 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-23 20:17:23,126 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:17:23,306 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:17:23,467 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2019-11-23 20:17:23,768 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2019-11-23 20:17:23,970 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-11-23 20:17:24,169 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-23 20:17:24,381 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-23 20:17:24,571 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2019-11-23 20:17:24,807 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2019-11-23 20:17:25,019 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2019-11-23 20:17:25,316 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2019-11-23 20:17:25,482 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2019-11-23 20:17:25,685 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-11-23 20:17:25,941 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2019-11-23 20:17:26,190 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-23 20:17:26,434 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-23 20:17:26,668 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2019-11-23 20:17:26,831 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2019-11-23 20:17:27,028 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2019-11-23 20:17:27,245 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2019-11-23 20:17:27,483 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-23 20:17:27,735 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-23 20:17:27,968 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-23 20:17:28,203 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2019-11-23 20:17:28,430 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2019-11-23 20:17:28,771 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2019-11-23 20:17:28,969 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2019-11-23 20:17:29,177 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-11-23 20:17:29,390 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-11-23 20:17:29,613 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-11-23 20:17:29,823 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-11-23 20:17:30,734 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-23 20:17:30,972 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-23 20:17:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:32,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867970249] [2019-11-23 20:17:32,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071712354] [2019-11-23 20:17:32,933 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:32,990 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:17:32,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:32,992 WARN L253 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-23 20:17:32,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:33,140 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:17:33,140 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:33,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:33,146 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:33,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-23 20:17:41,479 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,481 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:41,481 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,482 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:41,483 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,483 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:41,484 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:41,486 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,486 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,487 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:41,516 INFO L343 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2019-11-23 20:17:41,516 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 34 [2019-11-23 20:17:41,518 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:41,534 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:41,534 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:41,535 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:3 [2019-11-23 20:17:41,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:41,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:41,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 61] total 132 [2019-11-23 20:17:41,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526001769] [2019-11-23 20:17:41,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-11-23 20:17:41,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:41,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-11-23 20:17:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=15593, Unknown=0, NotChecked=0, Total=17292 [2019-11-23 20:17:41,761 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 132 states. [2019-11-23 20:17:43,907 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2019-11-23 20:17:46,500 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2019-11-23 20:17:49,340 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2019-11-23 20:17:49,718 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2019-11-23 20:17:50,547 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 71 [2019-11-23 20:17:51,108 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 71 [2019-11-23 20:17:51,547 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2019-11-23 20:17:51,956 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2019-11-23 20:17:52,299 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-11-23 20:17:52,691 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 58 [2019-11-23 20:17:53,740 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 66 [2019-11-23 20:17:54,328 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 64 [2019-11-23 20:17:55,187 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 43 [2019-11-23 20:17:59,020 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 56 [2019-11-23 20:18:00,458 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 73 [2019-11-23 20:18:00,950 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 76 [2019-11-23 20:18:01,761 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 79 [2019-11-23 20:18:02,671 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2019-11-23 20:18:04,685 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 67 [2019-11-23 20:18:05,629 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2019-11-23 20:18:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:08,611 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2019-11-23 20:18:08,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-23 20:18:08,612 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 77 [2019-11-23 20:18:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:08,614 INFO L225 Difference]: With dead ends: 201 [2019-11-23 20:18:08,614 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:18:08,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15157 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=3542, Invalid=37870, Unknown=0, NotChecked=0, Total=41412 [2019-11-23 20:18:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:18:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2019-11-23 20:18:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:18:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2019-11-23 20:18:08,636 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2019-11-23 20:18:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:08,636 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2019-11-23 20:18:08,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-11-23 20:18:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2019-11-23 20:18:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:18:08,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:08,638 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:08,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:08,842 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2019-11-23 20:18:08,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:08,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13979538] [2019-11-23 20:18:08,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:18:08,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13979538] [2019-11-23 20:18:08,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560157896] [2019-11-23 20:18:08,944 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:09,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:09,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:18:09,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:09,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:18:09,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592468391] [2019-11-23 20:18:09,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:09,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:09,100 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand 16 states. [2019-11-23 20:18:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:09,602 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2019-11-23 20:18:09,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:09,603 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2019-11-23 20:18:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:09,604 INFO L225 Difference]: With dead ends: 293 [2019-11-23 20:18:09,604 INFO L226 Difference]: Without dead ends: 166 [2019-11-23 20:18:09,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:18:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-23 20:18:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2019-11-23 20:18:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:18:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2019-11-23 20:18:09,617 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 79 [2019-11-23 20:18:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:09,617 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2019-11-23 20:18:09,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2019-11-23 20:18:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:18:09,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:09,619 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:09,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:09,822 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 8 times [2019-11-23 20:18:09,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:09,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919751974] [2019-11-23 20:18:09,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:18:09,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919751974] [2019-11-23 20:18:09,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49445276] [2019-11-23 20:18:09,924 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:09,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:09,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:09,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:09,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:18:10,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:10,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:18:10,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258548976] [2019-11-23 20:18:10,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:10,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:10,054 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand 16 states. [2019-11-23 20:18:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:10,616 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2019-11-23 20:18:10,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:10,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-11-23 20:18:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:10,617 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:18:10,618 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:18:10,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:18:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2019-11-23 20:18:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:18:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-11-23 20:18:10,625 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2019-11-23 20:18:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:10,625 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-11-23 20:18:10,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-11-23 20:18:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:18:10,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:10,627 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:10,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:10,830 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2019-11-23 20:18:10,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:10,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278787058] [2019-11-23 20:18:10,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:11,727 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2019-11-23 20:18:11,987 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2019-11-23 20:18:12,218 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2019-11-23 20:18:12,367 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-11-23 20:18:12,733 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2019-11-23 20:18:12,884 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-11-23 20:18:13,168 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2019-11-23 20:18:13,311 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-11-23 20:18:13,460 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2019-11-23 20:18:13,845 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2019-11-23 20:18:14,003 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-23 20:18:14,233 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-11-23 20:18:14,483 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2019-11-23 20:18:14,704 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2019-11-23 20:18:14,940 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-11-23 20:18:15,158 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2019-11-23 20:18:15,376 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-11-23 20:18:15,558 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2019-11-23 20:18:15,705 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2019-11-23 20:18:15,868 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2019-11-23 20:18:16,043 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2019-11-23 20:18:16,313 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-11-23 20:18:16,587 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-11-23 20:18:16,895 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2019-11-23 20:18:17,174 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2019-11-23 20:18:17,422 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2019-11-23 20:18:17,674 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-11-23 20:18:17,895 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:18:18,067 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-11-23 20:18:18,266 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2019-11-23 20:18:18,479 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-11-23 20:18:18,741 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2019-11-23 20:18:19,020 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2019-11-23 20:18:19,304 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 20:18:19,585 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 20:18:19,861 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-11-23 20:18:20,137 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-11-23 20:18:20,409 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:18:20,602 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-11-23 20:18:20,828 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2019-11-23 20:18:21,062 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2019-11-23 20:18:21,356 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-11-23 20:18:21,849 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2019-11-23 20:18:22,153 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-23 20:18:22,447 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2019-11-23 20:18:22,718 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-23 20:18:23,113 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2019-11-23 20:18:23,413 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-11-23 20:18:23,709 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2019-11-23 20:18:23,991 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-11-23 20:18:24,287 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2019-11-23 20:18:24,585 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-11-23 20:18:24,881 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-23 20:18:25,149 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-11-23 20:18:25,480 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-23 20:18:25,718 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-11-23 20:18:25,952 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-11-23 20:18:26,182 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:18:26,437 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2019-11-23 20:18:26,673 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-11-23 20:18:26,918 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-23 20:18:27,522 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-23 20:18:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:28,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278787058] [2019-11-23 20:18:28,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928570812] [2019-11-23 20:18:28,902 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:28,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:18:28,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:28,984 WARN L253 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 156 conjunts are in the unsatisfiable core [2019-11-23 20:18:28,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:29,068 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:18:29,069 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:18:29,076 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:18:29,076 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:18:29,077 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21