/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-examples/standard_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:44,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:44,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:44,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:38:44,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:44,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:44,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:44,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:44,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:44,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:44,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:44,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:44,962 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:44,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:44,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:44,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:44,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:44,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:44,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:44,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:44,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:44,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:44,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:44,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:44,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:44,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:44,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:44,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:44,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:44,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:44,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:44,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:44,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:44,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:45,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:45,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:45,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:45,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:45,480 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:45,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2020-12-21 21:38:45,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431a8957b/b9adc1f23d7d4e80a8d11fae10e6e2b4/FLAG0bb7ef411 [2020-12-21 21:38:46,183 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:46,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2020-12-21 21:38:46,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431a8957b/b9adc1f23d7d4e80a8d11fae10e6e2b4/FLAG0bb7ef411 [2020-12-21 21:38:46,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431a8957b/b9adc1f23d7d4e80a8d11fae10e6e2b4 [2020-12-21 21:38:46,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:46,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:46,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:46,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:46,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:46,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:46,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34938cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46, skipping insertion in model container [2020-12-21 21:38:46,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:46,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:46,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:46,833 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-examples/standard_partial_init_ground.i[821,834] [2020-12-21 21:38:46,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:46,874 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:46,896 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-examples/standard_partial_init_ground.i[821,834] [2020-12-21 21:38:46,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:46,944 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:46,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46 WrapperNode [2020-12-21 21:38:46,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:46,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:46,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:46,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:46,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:46,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:46,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:46,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:46,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:46,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:47,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (1/1) ... [2020-12-21 21:38:47,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:47,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:47,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:47,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:47,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (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 21:38:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:47,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:47,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:47,520 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 21:38:47,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:47 BoogieIcfgContainer [2020-12-21 21:38:47,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:47,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:47,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:47,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:47,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:46" (1/3) ... [2020-12-21 21:38:47,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff46290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:47, skipping insertion in model container [2020-12-21 21:38:47,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:46" (2/3) ... [2020-12-21 21:38:47,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff46290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:47, skipping insertion in model container [2020-12-21 21:38:47,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:47" (3/3) ... [2020-12-21 21:38:47,569 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2020-12-21 21:38:47,583 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:47,591 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:38:47,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:38:47,651 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:47,652 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:47,652 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:47,652 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:47,652 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:47,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:47,653 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:47,653 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-21 21:38:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:47,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:47,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:47,707 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2020-12-21 21:38:47,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303596206] [2020-12-21 21:38:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:47,930 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 21:38:47,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303596206] [2020-12-21 21:38:47,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:47,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:47,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782443223] [2020-12-21 21:38:47,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:47,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:47,955 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-21 21:38:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:47,974 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-12-21 21:38:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:47,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:38:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:47,986 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:38:47,987 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:38:47,990 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 21:38:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:38:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-21 21:38:48,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:38:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-21 21:38:48,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2020-12-21 21:38:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,030 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-21 21:38:48,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-21 21:38:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:48,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:48,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2016295915, now seen corresponding path program 1 times [2020-12-21 21:38:48,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99174116] [2020-12-21 21:38:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,090 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 21:38:48,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99174116] [2020-12-21 21:38:48,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:48,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:48,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328155610] [2020-12-21 21:38:48,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:48,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:48,097 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-21 21:38:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,175 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-12-21 21:38:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:48,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:38:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,177 INFO L225 Difference]: With dead ends: 45 [2020-12-21 21:38:48,177 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:38:48,179 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 21:38:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:38:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:38:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:38:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 21:38:48,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-21 21:38:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,195 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 21:38:48,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 21:38:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:38:48,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:48,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2020-12-21 21:38:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084610046] [2020-12-21 21:38:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:48,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084610046] [2020-12-21 21:38:48,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154901760] [2020-12-21 21:38:48,310 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 21:38:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:48,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:48,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787853909] [2020-12-21 21:38:48,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:48,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:48,504 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-21 21:38:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,607 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-12-21 21:38:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:48,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:38:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,612 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:38:48,612 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:38:48,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:38:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-21 21:38:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:38:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-21 21:38:48,624 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2020-12-21 21:38:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-21 21:38:48,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-21 21:38:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:38:48,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:38:48,828 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1735604177, now seen corresponding path program 2 times [2020-12-21 21:38:48,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119526653] [2020-12-21 21:38:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119526653] [2020-12-21 21:38:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735219828] [2020-12-21 21:38:48,914 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 21:38:48,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:48,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:49,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:49,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:38:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175330094] [2020-12-21 21:38:49,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:38:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:38:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:49,038 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-21 21:38:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,098 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-12-21 21:38:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:38:49,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-21 21:38:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,100 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:38:49,100 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:38:49,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:38:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-21 21:38:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:38:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-21 21:38:49,112 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2020-12-21 21:38:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,113 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-21 21:38:49,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:38:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-21 21:38:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:38:49,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:49,326 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash 962598037, now seen corresponding path program 3 times [2020-12-21 21:38:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853608789] [2020-12-21 21:38:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:49,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853608789] [2020-12-21 21:38:49,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537302775] [2020-12-21 21:38:49,405 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 21:38:49,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:38:49,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:49,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:49,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:38:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435957108] [2020-12-21 21:38:49,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:49,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:49,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:49,552 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2020-12-21 21:38:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,612 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-12-21 21:38:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:38:49,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-21 21:38:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,614 INFO L225 Difference]: With dead ends: 67 [2020-12-21 21:38:49,614 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:38:49,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:38:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-21 21:38:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:38:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-21 21:38:49,626 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 24 [2020-12-21 21:38:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,627 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-21 21:38:49,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-21 21:38:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:38:49,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:49,831 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash 668967821, now seen corresponding path program 4 times [2020-12-21 21:38:49,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894607666] [2020-12-21 21:38:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:49,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894607666] [2020-12-21 21:38:49,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036841442] [2020-12-21 21:38:49,935 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 21:38:50,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:50,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:50,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:50,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269008843] [2020-12-21 21:38:50,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:50,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:50,064 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-12-21 21:38:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:50,129 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-12-21 21:38:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:50,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:38:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:50,131 INFO L225 Difference]: With dead ends: 75 [2020-12-21 21:38:50,131 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:38:50,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:38:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-21 21:38:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:38:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-21 21:38:50,138 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2020-12-21 21:38:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:50,138 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-21 21:38:50,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-21 21:38:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:38:50,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:50,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:50,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:50,355 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1015235801, now seen corresponding path program 5 times [2020-12-21 21:38:50,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:50,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663597575] [2020-12-21 21:38:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663597575] [2020-12-21 21:38:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221041013] [2020-12-21 21:38:50,456 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 21:38:50,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:38:50,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:51,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:51,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:38:51,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662952566] [2020-12-21 21:38:51,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:51,057 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 9 states. [2020-12-21 21:38:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:51,175 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2020-12-21 21:38:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:38:51,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-12-21 21:38:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:51,179 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:38:51,180 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:38:51,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:38:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-21 21:38:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:38:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-12-21 21:38:51,198 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 34 [2020-12-21 21:38:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:51,198 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-12-21 21:38:51,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-12-21 21:38:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:38:51,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:51,203 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:51,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:38:51,418 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash 169789257, now seen corresponding path program 6 times [2020-12-21 21:38:51,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:51,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823384890] [2020-12-21 21:38:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:51,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823384890] [2020-12-21 21:38:51,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843920754] [2020-12-21 21:38:51,526 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 21:38:51,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:51,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:38:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:38:51,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:51,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:38:51,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829106008] [2020-12-21 21:38:51,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:38:51,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:51,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:38:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:51,836 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 10 states. [2020-12-21 21:38:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:51,922 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-12-21 21:38:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:51,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-21 21:38:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:51,923 INFO L225 Difference]: With dead ends: 91 [2020-12-21 21:38:51,924 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:38:51,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:38:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-12-21 21:38:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:38:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 21:38:51,930 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2020-12-21 21:38:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:51,930 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 21:38:51,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:38:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 21:38:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:38:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:51,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:52,146 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash 244309277, now seen corresponding path program 7 times [2020-12-21 21:38:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349210928] [2020-12-21 21:38:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:52,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349210928] [2020-12-21 21:38:52,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108896643] [2020-12-21 21:38:52,324 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 21:38:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:52,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:52,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:38:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548810935] [2020-12-21 21:38:52,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:38:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:38:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:52,465 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 11 states. [2020-12-21 21:38:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,559 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-12-21 21:38:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:38:52,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-21 21:38:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,561 INFO L225 Difference]: With dead ends: 99 [2020-12-21 21:38:52,561 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:52,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-21 21:38:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:38:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 21:38:52,583 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 44 [2020-12-21 21:38:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,583 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 21:38:52,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:38:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 21:38:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:38:52,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,585 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:52,800 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1422367995, now seen corresponding path program 8 times [2020-12-21 21:38:52,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061542796] [2020-12-21 21:38:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061542796] [2020-12-21 21:38:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503313638] [2020-12-21 21:38:52,924 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 21:38:53,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:53,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:38:53,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:53,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:38:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876347447] [2020-12-21 21:38:53,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:53,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:53,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:53,092 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 12 states. [2020-12-21 21:38:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:53,205 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2020-12-21 21:38:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:38:53,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-12-21 21:38:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:53,207 INFO L225 Difference]: With dead ends: 107 [2020-12-21 21:38:53,207 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:38:53,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:38:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-12-21 21:38:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:38:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 21:38:53,214 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 49 [2020-12-21 21:38:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:53,215 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 21:38:53,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 21:38:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:38:53,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:53,216 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:53,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:38:53,430 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1308499297, now seen corresponding path program 9 times [2020-12-21 21:38:53,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:53,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106354619] [2020-12-21 21:38:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106354619] [2020-12-21 21:38:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726317811] [2020-12-21 21:38:53,609 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 21:38:55,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:38:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:38:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:38:55,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:55,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:38:55,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703418236] [2020-12-21 21:38:55,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:38:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:38:55,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:55,485 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 13 states. [2020-12-21 21:38:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,612 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-12-21 21:38:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:38:55,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-12-21 21:38:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,613 INFO L225 Difference]: With dead ends: 115 [2020-12-21 21:38:55,614 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:38:55,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:38:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-21 21:38:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:38:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-12-21 21:38:55,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 54 [2020-12-21 21:38:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,621 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-12-21 21:38:55,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:38:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-12-21 21:38:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:38:55,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,622 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:55,837 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1077163713, now seen corresponding path program 10 times [2020-12-21 21:38:55,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855427296] [2020-12-21 21:38:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:38:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855427296] [2020-12-21 21:38:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540385822] [2020-12-21 21:38:56,066 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:56,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:56,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:38:56,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:38:56,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106593158] [2020-12-21 21:38:56,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:56,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:56,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:56,308 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 14 states. [2020-12-21 21:38:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,459 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-12-21 21:38:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:38:56,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-12-21 21:38:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,462 INFO L225 Difference]: With dead ends: 123 [2020-12-21 21:38:56,463 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:38:56,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:38:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:38:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:38:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-12-21 21:38:56,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 59 [2020-12-21 21:38:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,470 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-12-21 21:38:56,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-12-21 21:38:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:38:56,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,471 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:56,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:56,683 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash -481933915, now seen corresponding path program 11 times [2020-12-21 21:38:56,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:56,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307361277] [2020-12-21 21:38:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:38:56,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307361277] [2020-12-21 21:38:56,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010647136] [2020-12-21 21:38:56,900 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:35,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:39:35,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:39:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:39:35,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:35,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:39:35,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028215907] [2020-12-21 21:39:35,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:39:35,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:39:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:39:35,556 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 15 states. [2020-12-21 21:39:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:35,707 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-12-21 21:39:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:39:35,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-21 21:39:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:35,709 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:39:35,709 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:39:35,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:39:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:39:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-12-21 21:39:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:39:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-12-21 21:39:35,715 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 64 [2020-12-21 21:39:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:35,716 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-12-21 21:39:35,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:39:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-12-21 21:39:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:39:35,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:35,717 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:35,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:39:35,933 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash -770047363, now seen corresponding path program 12 times [2020-12-21 21:39:35,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:35,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461309732] [2020-12-21 21:39:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:39:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461309732] [2020-12-21 21:39:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780565794] [2020-12-21 21:39:36,128 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:42,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:39:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:39:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:39:42,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:42,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:39:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799099736] [2020-12-21 21:39:42,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:39:42,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:42,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:39:42,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:39:42,180 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 16 states. [2020-12-21 21:39:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:42,322 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2020-12-21 21:39:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:39:42,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-21 21:39:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:42,324 INFO L225 Difference]: With dead ends: 139 [2020-12-21 21:39:42,324 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 21:39:42,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:39:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 21:39:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-12-21 21:39:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-21 21:39:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-12-21 21:39:42,330 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 69 [2020-12-21 21:39:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:42,331 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-12-21 21:39:42,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:39:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-12-21 21:39:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-21 21:39:42,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:42,332 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:42,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:39:42,548 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash -991914519, now seen corresponding path program 13 times [2020-12-21 21:39:42,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:42,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090382314] [2020-12-21 21:39:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:39:42,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090382314] [2020-12-21 21:39:42,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993383243] [2020-12-21 21:39:42,792 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:39:42,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:39:43,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:43,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:39:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625156258] [2020-12-21 21:39:43,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:39:43,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:39:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:43,071 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 17 states. [2020-12-21 21:39:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:43,245 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2020-12-21 21:39:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:39:43,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-12-21 21:39:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:43,246 INFO L225 Difference]: With dead ends: 147 [2020-12-21 21:39:43,246 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:39:43,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:39:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-12-21 21:39:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:39:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-12-21 21:39:43,268 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 74 [2020-12-21 21:39:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:43,268 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-12-21 21:39:43,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:39:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-12-21 21:39:43,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:39:43,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:43,276 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:43,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:39:43,493 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2045871673, now seen corresponding path program 14 times [2020-12-21 21:39:43,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:43,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232942711] [2020-12-21 21:39:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:39:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232942711] [2020-12-21 21:39:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500572335] [2020-12-21 21:39:43,827 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:43,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:43,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:39:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:39:44,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:44,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:39:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599266837] [2020-12-21 21:39:44,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:44,098 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 18 states. [2020-12-21 21:39:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:44,297 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2020-12-21 21:39:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:39:44,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-21 21:39:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:44,298 INFO L225 Difference]: With dead ends: 155 [2020-12-21 21:39:44,298 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 21:39:44,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 21:39:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-12-21 21:39:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:39:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-12-21 21:39:44,303 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 79 [2020-12-21 21:39:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:44,304 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-12-21 21:39:44,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-12-21 21:39:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:39:44,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:44,305 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:44,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:44,519 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1153085907, now seen corresponding path program 15 times [2020-12-21 21:39:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:44,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101891147] [2020-12-21 21:39:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:39:44,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101891147] [2020-12-21 21:39:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560388499] [2020-12-21 21:39:44,755 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:09,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:40:09,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:09,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:40:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:40:09,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:09,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:40:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305344189] [2020-12-21 21:40:09,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:40:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:40:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:40:09,991 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 19 states. [2020-12-21 21:40:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:10,187 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-12-21 21:40:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:40:10,188 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-21 21:40:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:10,188 INFO L225 Difference]: With dead ends: 163 [2020-12-21 21:40:10,188 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:40:10,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:40:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:40:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-21 21:40:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:40:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-12-21 21:40:10,194 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 84 [2020-12-21 21:40:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:10,195 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-12-21 21:40:10,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:40:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-12-21 21:40:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:40:10,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:10,196 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:10,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:40:10,410 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1664974347, now seen corresponding path program 16 times [2020-12-21 21:40:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:10,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760068422] [2020-12-21 21:40:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:40:10,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760068422] [2020-12-21 21:40:10,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065387088] [2020-12-21 21:40:10,737 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:11,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:40:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:40:11,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:40:11,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:11,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:40:11,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78518833] [2020-12-21 21:40:11,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:40:11,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:40:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:40:11,259 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 20 states. [2020-12-21 21:40:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:11,488 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2020-12-21 21:40:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:40:11,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-21 21:40:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:11,490 INFO L225 Difference]: With dead ends: 171 [2020-12-21 21:40:11,490 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:40:11,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:40:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:40:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-12-21 21:40:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:40:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-12-21 21:40:11,496 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 89 [2020-12-21 21:40:11,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:11,496 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-12-21 21:40:11,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:40:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-12-21 21:40:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 21:40:11,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:11,497 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:11,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:40:11,710 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 619490929, now seen corresponding path program 17 times [2020-12-21 21:40:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084149452] [2020-12-21 21:40:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:40:12,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084149452] [2020-12-21 21:40:12,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378715777] [2020-12-21 21:40:12,014 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true