/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:26:51,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:26:51,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:26:51,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:26:51,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:26:51,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:26:51,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:26:51,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:26:51,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:26:51,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:26:51,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:26:51,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:26:51,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:26:51,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:26:51,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:26:51,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:26:51,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:26:51,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:26:51,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:26:51,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:26:51,978 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:26:51,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:26:51,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:26:51,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:26:51,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:26:51,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:26:51,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:26:51,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:26:51,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:26:51,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:26:51,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:26:51,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:26:51,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:26:51,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:26:51,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:26:51,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:26:51,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:26:51,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:26:51,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:26:51,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:26:51,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:26:51,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:26:52,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:26:52,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:26:52,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:26:52,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:26:52,458 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:26:52,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m4.c [2020-12-21 22:26:52,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787753c21/59edbd0652b04635872ffc886a490ef2/FLAG26be8f346 [2020-12-21 22:26:53,225 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:26:53,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c [2020-12-21 22:26:53,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787753c21/59edbd0652b04635872ffc886a490ef2/FLAG26be8f346 [2020-12-21 22:26:53,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787753c21/59edbd0652b04635872ffc886a490ef2 [2020-12-21 22:26:53,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:26:53,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:26:53,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:26:53,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:26:53,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:26:53,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f759fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53, skipping insertion in model container [2020-12-21 22:26:53,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:26:53,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:26:53,832 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2020-12-21 22:26:53,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:26:53,868 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:26:53,884 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2020-12-21 22:26:53,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:26:53,922 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:26:53,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53 WrapperNode [2020-12-21 22:26:53,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:26:53,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:26:53,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:26:53,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:26:53,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:26:53,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:26:53,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:26:53,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:26:53,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:53,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:54,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:54,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:54,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (1/1) ... [2020-12-21 22:26:54,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:26:54,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:26:54,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:26:54,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:26:54,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (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 [2020-12-21 22:26:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:26:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:26:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:26:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:26:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:26:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:26:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:26:54,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:26:54,690 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:26:54,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:54 BoogieIcfgContainer [2020-12-21 22:26:54,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:26:54,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:26:54,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:26:54,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:26:54,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:26:53" (1/3) ... [2020-12-21 22:26:54,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e79b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:54, skipping insertion in model container [2020-12-21 22:26:54,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:26:53" (2/3) ... [2020-12-21 22:26:54,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e79b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:26:54, skipping insertion in model container [2020-12-21 22:26:54,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:26:54" (3/3) ... [2020-12-21 22:26:54,703 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2020-12-21 22:26:54,722 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:26:54,737 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:26:54,784 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:26:54,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:26:54,836 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:26:54,836 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:26:54,836 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:26:54,837 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:26:54,837 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:26:54,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:26:54,837 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:26:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-12-21 22:26:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:26:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:54,867 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] [2020-12-21 22:26:54,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2020-12-21 22:26:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:54,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239797247] [2020-12-21 22:26:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:26:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239797247] [2020-12-21 22:26:55,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:26:55,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:26:55,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876516111] [2020-12-21 22:26:55,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:26:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:26:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:26:55,108 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-12-21 22:26:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:55,133 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2020-12-21 22:26:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:26:55,134 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-12-21 22:26:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:55,144 INFO L225 Difference]: With dead ends: 71 [2020-12-21 22:26:55,145 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:26:55,148 INFO L677 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 [2020-12-21 22:26:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:26:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-21 22:26:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 22:26:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-21 22:26:55,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2020-12-21 22:26:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:55,190 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-21 22:26:55,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:26:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-21 22:26:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:26:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:55,192 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] [2020-12-21 22:26:55,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:26:55,193 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2020-12-21 22:26:55,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:55,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826569038] [2020-12-21 22:26:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:26:55,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826569038] [2020-12-21 22:26:55,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:26:55,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:26:55,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009726685] [2020-12-21 22:26:55,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:26:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:26:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:26:55,325 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2020-12-21 22:26:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:55,422 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-12-21 22:26:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:26:55,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 22:26:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:55,424 INFO L225 Difference]: With dead ends: 63 [2020-12-21 22:26:55,424 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:26:55,425 INFO L677 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 [2020-12-21 22:26:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:26:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 22:26:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:26:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-21 22:26:55,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2020-12-21 22:26:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:55,433 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-21 22:26:55,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:26:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-21 22:26:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:26:55,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:55,434 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] [2020-12-21 22:26:55,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:26:55,435 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2020-12-21 22:26:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:55,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720611121] [2020-12-21 22:26:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:26:55,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720611121] [2020-12-21 22:26:55,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:26:55,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:26:55,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646573843] [2020-12-21 22:26:55,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:26:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:26:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:26:55,507 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-12-21 22:26:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:55,652 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2020-12-21 22:26:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:26:55,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-21 22:26:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:55,654 INFO L225 Difference]: With dead ends: 75 [2020-12-21 22:26:55,655 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:26:55,655 INFO L677 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 [2020-12-21 22:26:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:26:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-21 22:26:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:26:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-21 22:26:55,665 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2020-12-21 22:26:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:55,666 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-21 22:26:55,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:26:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-21 22:26:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:26:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:55,668 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] [2020-12-21 22:26:55,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:26:55,668 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2020-12-21 22:26:55,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:55,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484262743] [2020-12-21 22:26:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:26:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484262743] [2020-12-21 22:26:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827801627] [2020-12-21 22:26:55,779 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 [2020-12-21 22:26:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:26:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:26:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:56,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:26:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657149344] [2020-12-21 22:26:56,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:26:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:26:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:26:56,120 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2020-12-21 22:26:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:56,239 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-12-21 22:26:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:26:56,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-12-21 22:26:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:56,241 INFO L225 Difference]: With dead ends: 81 [2020-12-21 22:26:56,241 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 22:26:56,242 INFO L677 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 [2020-12-21 22:26:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 22:26:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-21 22:26:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:26:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-21 22:26:56,251 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2020-12-21 22:26:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:56,252 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-21 22:26:56,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:26:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-21 22:26:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:26:56,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:56,254 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] [2020-12-21 22:26:56,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:56,469 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2020-12-21 22:26:56,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:56,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315677789] [2020-12-21 22:26:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 22:26:56,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315677789] [2020-12-21 22:26:56,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634428482] [2020-12-21 22:26:56,617 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 [2020-12-21 22:26:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:26:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:26:56,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 22:26:56,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:56,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 22:26:56,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174707545] [2020-12-21 22:26:56,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:26:56,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:26:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:26:56,826 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-12-21 22:26:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:57,033 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-12-21 22:26:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:26:57,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-12-21 22:26:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:57,035 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:26:57,036 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 22:26:57,037 INFO L677 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 [2020-12-21 22:26:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 22:26:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-12-21 22:26:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 22:26:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-21 22:26:57,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2020-12-21 22:26:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:57,047 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-21 22:26:57,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:26:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-21 22:26:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:26:57,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:57,050 INFO L422 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] [2020-12-21 22:26:57,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:57,266 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2020-12-21 22:26:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689185717] [2020-12-21 22:26:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689185717] [2020-12-21 22:27:00,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888913966] [2020-12-21 22:27:00,878 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 [2020-12-21 22:27:00,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:27:00,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-21 22:27:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:09,863 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:27:09,864 INFO L382 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 [2020-12-21 22:27:09,869 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:27:09,882 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:27:09,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:09,887 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:27:09,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2020-12-21 22:27:10,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:10,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:27:10,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:27:10,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:10,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:10,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 47] total 80 [2020-12-21 22:27:10,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512687395] [2020-12-21 22:27:10,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-21 22:27:10,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-21 22:27:10,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=6047, Unknown=0, NotChecked=0, Total=6320 [2020-12-21 22:27:10,538 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 80 states. [2020-12-21 22:27:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:27,239 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2020-12-21 22:27:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-21 22:27:27,241 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 59 [2020-12-21 22:27:27,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:27,243 INFO L225 Difference]: With dead ends: 169 [2020-12-21 22:27:27,243 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 22:27:27,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2566 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=440, Invalid=10066, Unknown=0, NotChecked=0, Total=10506 [2020-12-21 22:27:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 22:27:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2020-12-21 22:27:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 22:27:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-12-21 22:27:27,277 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2020-12-21 22:27:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:27,278 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-12-21 22:27:27,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-21 22:27:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-12-21 22:27:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:27:27,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:27,283 INFO L422 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] [2020-12-21 22:27:27,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:27,486 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:27,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2020-12-21 22:27:27,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:27,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558327420] [2020-12-21 22:27:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 22:27:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558327420] [2020-12-21 22:27:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169325238] [2020-12-21 22:27:27,619 INFO L93 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 [2020-12-21 22:27:27,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:27:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:27,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:27:27,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 22:27:27,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:27,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:27:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37607218] [2020-12-21 22:27:27,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:27:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:27:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:27:27,857 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 13 states. [2020-12-21 22:27:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:28,357 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-12-21 22:27:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:27:28,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-12-21 22:27:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:28,360 INFO L225 Difference]: With dead ends: 200 [2020-12-21 22:27:28,360 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:27:28,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:27:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:27:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-21 22:27:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-21 22:27:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-12-21 22:27:28,379 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2020-12-21 22:27:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:28,379 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-12-21 22:27:28,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:27:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-12-21 22:27:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:27:28,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:28,382 INFO L422 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] [2020-12-21 22:27:28,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:28,599 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2020-12-21 22:27:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:28,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497697887] [2020-12-21 22:27:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 22:27:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497697887] [2020-12-21 22:27:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772899004] [2020-12-21 22:27:28,704 INFO L93 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 [2020-12-21 22:27:28,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:27:28,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:28,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:27:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 22:27:28,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:28,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:27:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083009689] [2020-12-21 22:27:28,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:27:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:27:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:27:28,979 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 13 states. [2020-12-21 22:27:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:29,432 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-12-21 22:27:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:27:29,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-12-21 22:27:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:29,435 INFO L225 Difference]: With dead ends: 167 [2020-12-21 22:27:29,435 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 22:27:29,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:27:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 22:27:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-12-21 22:27:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 22:27:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-12-21 22:27:29,445 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2020-12-21 22:27:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:29,446 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-12-21 22:27:29,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:27:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-12-21 22:27:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 22:27:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:29,448 INFO L422 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] [2020-12-21 22:27:29,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:29,662 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2020-12-21 22:27:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:29,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103514142] [2020-12-21 22:27:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:31,588 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-21 22:27:32,426 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-21 22:27:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103514142] [2020-12-21 22:27:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228509621] [2020-12-21 22:27:38,404 INFO L93 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 [2020-12-21 22:27:38,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:27:38,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:38,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-21 22:27:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:51,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:27:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:51,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:51,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 57] total 107 [2020-12-21 22:27:51,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277887352] [2020-12-21 22:27:51,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-12-21 22:27:51,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-12-21 22:27:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=10690, Unknown=0, NotChecked=0, Total=11342 [2020-12-21 22:27:51,538 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 107 states. [2020-12-21 22:27:54,555 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-12-21 22:27:55,144 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2020-12-21 22:27:56,221 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 61 [2020-12-21 22:27:57,342 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 84 [2020-12-21 22:28:01,240 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-12-21 22:28:02,552 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-12-21 22:28:03,486 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-12-21 22:28:05,892 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-21 22:28:06,795 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-12-21 22:28:09,772 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-21 22:28:10,496 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-12-21 22:28:13,248 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-12-21 22:28:13,890 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-21 22:28:14,422 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-12-21 22:28:15,137 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-12-21 22:28:18,768 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-12-21 22:28:22,653 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-21 22:28:30,437 WARN L197 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 86 [2020-12-21 22:28:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:30,574 INFO L93 Difference]: Finished difference Result 224 states and 249 transitions. [2020-12-21 22:28:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-21 22:28:30,576 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 77 [2020-12-21 22:28:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:30,578 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:28:30,578 INFO L226 Difference]: Without dead ends: 153 [2020-12-21 22:28:30,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7066 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=1477, Invalid=22703, Unknown=0, NotChecked=0, Total=24180 [2020-12-21 22:28:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-21 22:28:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2020-12-21 22:28:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-21 22:28:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-12-21 22:28:30,603 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 77 [2020-12-21 22:28:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:30,604 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-12-21 22:28:30,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2020-12-21 22:28:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-12-21 22:28:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:28:30,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:30,606 INFO L422 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] [2020-12-21 22:28:30,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:30,819 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash -575533628, now seen corresponding path program 7 times [2020-12-21 22:28:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:30,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497832292] [2020-12-21 22:28:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 22:28:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497832292] [2020-12-21 22:28:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974572631] [2020-12-21 22:28:31,002 INFO L93 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 [2020-12-21 22:28:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:28:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-21 22:28:31,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:28:31,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:28:31,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88893199] [2020-12-21 22:28:31,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:28:31,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:28:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:28:31,442 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 16 states. [2020-12-21 22:28:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:32,310 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-12-21 22:28:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:28:32,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-12-21 22:28:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:32,313 INFO L225 Difference]: With dead ends: 252 [2020-12-21 22:28:32,313 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:28:32,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:28:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:28:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-21 22:28:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 22:28:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-12-21 22:28:32,329 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 79 [2020-12-21 22:28:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:32,330 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-12-21 22:28:32,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:28:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-12-21 22:28:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:28:32,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:32,332 INFO L422 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] [2020-12-21 22:28:32,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:28:32,546 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 692239334, now seen corresponding path program 8 times [2020-12-21 22:28:32,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:32,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569667344] [2020-12-21 22:28:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:28:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569667344] [2020-12-21 22:28:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161796476] [2020-12-21 22:28:32,718 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 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 [2020-12-21 22:28:32,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:28:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:28:33,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:28:33,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:28:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811520572] [2020-12-21 22:28:33,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:28:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:28:33,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:28:33,075 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states. [2020-12-21 22:28:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:33,948 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2020-12-21 22:28:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:28:33,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-12-21 22:28:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:33,951 INFO L225 Difference]: With dead ends: 209 [2020-12-21 22:28:33,951 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:28:33,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:28:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:28:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-12-21 22:28:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:28:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-12-21 22:28:33,960 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2020-12-21 22:28:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:33,961 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-12-21 22:28:33,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:28:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-12-21 22:28:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 22:28:33,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:33,962 INFO L422 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] [2020-12-21 22:28:34,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:28:34,177 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:34,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2020-12-21 22:28:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:34,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817180864] [2020-12-21 22:28:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:35,697 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-21 22:28:35,873 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-21 22:28:37,316 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-12-21 22:28:37,511 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-21 22:28:38,356 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-21 22:28:38,886 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-12-21 22:28:39,209 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-12-21 22:28:40,833 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-21 22:28:41,095 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-21 22:28:43,001 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-21 22:28:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:50,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817180864] [2020-12-21 22:28:50,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951653660] [2020-12-21 22:28:50,221 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 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 [2020-12-21 22:28:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:28:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:50,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 152 conjunts are in the unsatisfiable core [2020-12-21 22:28:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:50,576 INFO L382 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 [2020-12-21 22:28:50,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:28:50,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:28:50,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:28:50,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-21 22:29:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:29:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:29:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:29:48,605 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:48,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2020-12-21 22:29:48,608 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:29:48,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:29:48,613 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-21 22:29:48,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:29:48,620 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:29:48,657 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:48,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:29:48,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:29:48,663 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2020-12-21 22:29:49,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:29:50,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:29:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:29:51,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:29:51,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 72] total 147 [2020-12-21 22:29:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841778578] [2020-12-21 22:29:51,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 147 states [2020-12-21 22:29:51,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:51,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2020-12-21 22:29:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=20863, Unknown=1, NotChecked=0, Total=21462 [2020-12-21 22:29:51,336 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 147 states. [2020-12-21 22:30:00,479 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2020-12-21 22:30:02,524 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2020-12-21 22:30:04,871 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 66 [2020-12-21 22:30:06,406 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-12-21 22:30:07,286 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-21 22:30:09,285 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 94 [2020-12-21 22:30:11,100 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2020-12-21 22:30:11,869 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-21 22:30:15,241 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 149 DAG size of output: 102