/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:58:15,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:58:15,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:58:15,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:58:15,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:58:15,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:58:15,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:58:15,859 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 [2020-08-22 16:58:15,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:58:15,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:58:15,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:58:15,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:58:15,883 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:58:15,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:58:15,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:58:15,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:58:15,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:58:15,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:58:15,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:58:15,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:58:15,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:58:15,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:58:15,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:58:15,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:58:15,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:58:15,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:58:15,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:58:15,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:58:15,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:58:15,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:58:15,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:58:15,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:58:15,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:58:16,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:58:16,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:58:16,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:58:16,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:58:16,222 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:58:16,223 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 16:58:16,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ff35180/bf80b83877c3453b9eee9c2820b66f09/FLAG819b59348 [2020-08-22 16:58:16,894 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:58:16,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-22 16:58:16,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ff35180/bf80b83877c3453b9eee9c2820b66f09/FLAG819b59348 [2020-08-22 16:58:17,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01ff35180/bf80b83877c3453b9eee9c2820b66f09 [2020-08-22 16:58:17,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:58:17,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:58:17,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:17,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:58:17,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:58:17,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173f5186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17, skipping insertion in model container [2020-08-22 16:58:17,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:58:17,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:58:17,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:17,701 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:58:17,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:17,865 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:58:17,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17 WrapperNode [2020-08-22 16:58:17,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:17,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:58:17,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:58:17,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:58:17,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (1/1) ... [2020-08-22 16:58:17,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:58:17,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:58:17,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:58:17,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:58:17,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (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 [2020-08-22 16:58:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:58:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:58:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:58:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:58:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-22 16:58:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-22 16:58:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:58:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:58:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:58:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:58:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:58:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 16:58:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:58:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:58:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:58:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:58:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:58:21,096 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:58:21,096 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:58:21,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:21 BoogieIcfgContainer [2020-08-22 16:58:21,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:58:21,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:58:21,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:58:21,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:58:21,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:58:17" (1/3) ... [2020-08-22 16:58:21,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cffefe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:21, skipping insertion in model container [2020-08-22 16:58:21,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:17" (2/3) ... [2020-08-22 16:58:21,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cffefe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:21, skipping insertion in model container [2020-08-22 16:58:21,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:21" (3/3) ... [2020-08-22 16:58:21,109 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-22 16:58:21,120 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:58:21,128 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:58:21,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:58:21,168 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:58:21,168 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:58:21,168 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:58:21,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:58:21,169 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:58:21,169 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:58:21,169 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:58:21,169 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:58:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-22 16:58:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 16:58:21,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:21,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:21,200 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-22 16:58:21,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:21,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572970504] [2020-08-22 16:58:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:22,154 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-22 16:58:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:22,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572970504] [2020-08-22 16:58:22,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:58:22,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 16:58:22,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103776186] [2020-08-22 16:58:22,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:58:22,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:58:22,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:58:22,233 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-22 16:58:22,553 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 16:58:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:43,577 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-22 16:58:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:58:43,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-22 16:58:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:43,596 INFO L225 Difference]: With dead ends: 92 [2020-08-22 16:58:43,596 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:58:43,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-22 16:58:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:58:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 16:58:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:58:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-22 16:58:43,668 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-22 16:58:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:43,669 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-22 16:58:43,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:58:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-22 16:58:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 16:58:43,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:43,672 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:43,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:58:43,673 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-22 16:58:43,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:43,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846917127] [2020-08-22 16:58:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:44,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:44,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846917127] [2020-08-22 16:58:44,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125557638] [2020-08-22 16:58:44,157 INFO L95 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 [2020-08-22 16:58:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 25 conjunts are in the unsatisfiable core [2020-08-22 16:58:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:44,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:44,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-08-22 16:58:44,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393000005] [2020-08-22 16:58:44,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:58:44,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:58:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:58:44,572 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 16 states. [2020-08-22 16:58:44,826 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 16:59:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:59:09,581 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-22 16:59:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:59:09,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-08-22 16:59:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:59:09,584 INFO L225 Difference]: With dead ends: 65 [2020-08-22 16:59:09,584 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 16:59:09,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:59:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 16:59:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-22 16:59:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 16:59:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 16:59:09,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-22 16:59:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:59:09,607 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 16:59:09,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:59:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 16:59:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 16:59:09,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:09,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:09,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:59:09,814 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-22 16:59:09,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:09,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502274117] [2020-08-22 16:59:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:59:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:59:10,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502274117] [2020-08-22 16:59:10,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345668248] [2020-08-22 16:59:10,315 INFO L93 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 [2020-08-22 16:59:32,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:59:32,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:59:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 27 conjunts are in the unsatisfiable core [2020-08-22 16:59:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:59:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:59:32,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:59:32,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-08-22 16:59:32,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490625407] [2020-08-22 16:59:32,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:59:32,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:59:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:59:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:59:32,849 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 17 states. [2020-08-22 16:59:33,115 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-22 17:00:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:00:00,006 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-22 17:00:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 17:00:00,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-08-22 17:00:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:00:00,009 INFO L225 Difference]: With dead ends: 70 [2020-08-22 17:00:00,009 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 17:00:00,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-08-22 17:00:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 17:00:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-22 17:00:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 17:00:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-22 17:00:00,019 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-22 17:00:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:00:00,019 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-22 17:00:00,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 17:00:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-22 17:00:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 17:00:00,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:00:00,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:00:00,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:00:00,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:00:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:00:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-22 17:00:00,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:00:00,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894082440] [2020-08-22 17:00:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:00:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:00:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:00:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:00:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:00:00,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894082440] [2020-08-22 17:00:00,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652515327] [2020-08-22 17:00:00,743 INFO L93 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