/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_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:12:22,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:12:22,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:12:22,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 00:12:22,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:12:22,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:12:22,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:12:22,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:12:22,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:12:22,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:12:22,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:12:22,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:12:22,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:12:22,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:12:22,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:12:22,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:12:22,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:12:22,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:12:22,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:12:22,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:12:22,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:12:22,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:12:22,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:12:22,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:12:22,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:12:22,729 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:12:22,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:12:22,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:12:22,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:12:22,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:12:22,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:12:22,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:12:22,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:12:22,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:12:22,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:12:22,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:12:22,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:12:22,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:12:22,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:12:22,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:12:22,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:12:22,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:12:22,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:12:22,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:12:22,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:12:22,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:12:22,733 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:12:23,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:12:23,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:12:23,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:12:23,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:12:23,303 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:12:23,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2020-12-23 00:12:23,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53010f1f3/9269eaef68ae425eb68efc8fb9921eea/FLAGb8ef28de6 [2020-12-23 00:12:23,985 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:12:23,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2020-12-23 00:12:23,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53010f1f3/9269eaef68ae425eb68efc8fb9921eea/FLAGb8ef28de6 [2020-12-23 00:12:24,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/53010f1f3/9269eaef68ae425eb68efc8fb9921eea [2020-12-23 00:12:24,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:12:24,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:12:24,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:12:24,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:12:24,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:12:24,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd9cee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24, skipping insertion in model container [2020-12-23 00:12:24,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:12:24,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:12:24,547 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 00:12:24,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:12:24,577 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:12:24,593 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2020-12-23 00:12:24,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:12:24,621 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:12:24,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24 WrapperNode [2020-12-23 00:12:24,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:12:24,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:12:24,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:12:24,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:12:24,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:12:24,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:12:24,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:12:24,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:12:24,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... [2020-12-23 00:12:24,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:12:24,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:12:24,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:12:24,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:12:24,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:12:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:12:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:12:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:12:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:12:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:12:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:12:25,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:12:25,116 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 00:12:25,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:12:25 BoogieIcfgContainer [2020-12-23 00:12:25,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:12:25,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:12:25,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:12:25,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:12:25,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:12:24" (1/3) ... [2020-12-23 00:12:25,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10126714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:12:25, skipping insertion in model container [2020-12-23 00:12:25,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:12:24" (2/3) ... [2020-12-23 00:12:25,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10126714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:12:25, skipping insertion in model container [2020-12-23 00:12:25,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:12:25" (3/3) ... [2020-12-23 00:12:25,130 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2020-12-23 00:12:25,137 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:12:25,143 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:12:25,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:12:25,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:12:25,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:12:25,201 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:12:25,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:12:25,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:12:25,202 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:12:25,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:12:25,202 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:12:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 00:12:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:12:25,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:25,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:25,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:25,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2020-12-23 00:12:25,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:25,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986362968] [2020-12-23 00:12:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:12:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986362968] [2020-12-23 00:12:25,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:12:25,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:12:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404950760] [2020-12-23 00:12:25,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:12:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:12:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:12:25,496 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-23 00:12:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:25,556 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-12-23 00:12:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:12:25,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:12:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:25,570 INFO L225 Difference]: With dead ends: 28 [2020-12-23 00:12:25,571 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 00:12:25,575 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 [2020-12-23 00:12:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 00:12:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 00:12:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 00:12:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 00:12:25,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-23 00:12:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:25,655 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 00:12:25,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:12:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 00:12:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:12:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:25,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:25,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:12:25,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2020-12-23 00:12:25,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:25,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880632353] [2020-12-23 00:12:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:12:25,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880632353] [2020-12-23 00:12:25,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709417289] [2020-12-23 00:12:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:12:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:12:25,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:12:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2020-12-23 00:12:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545748813] [2020-12-23 00:12:25,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:12:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:12:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:12:25,913 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-23 00:12:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:25,949 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 00:12:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:12:25,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:12:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:25,951 INFO L225 Difference]: With dead ends: 24 [2020-12-23 00:12:25,951 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 00:12:25,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:12:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 00:12:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-12-23 00:12:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:12:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 00:12:25,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-23 00:12:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:25,957 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 00:12:25,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:12:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 00:12:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:12:25,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:25,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:26,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:12:26,172 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2020-12-23 00:12:26,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:26,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069495206] [2020-12-23 00:12:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:12:26,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069495206] [2020-12-23 00:12:26,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796016319] [2020-12-23 00:12:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:12:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:12:26,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:26,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:12:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890522293] [2020-12-23 00:12:26,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:12:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:12:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:12:26,388 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2020-12-23 00:12:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:26,443 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-23 00:12:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:12:26,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 00:12:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:26,445 INFO L225 Difference]: With dead ends: 28 [2020-12-23 00:12:26,446 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 00:12:26,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:12:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 00:12:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2020-12-23 00:12:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 00:12:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 00:12:26,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-12-23 00:12:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:26,452 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 00:12:26,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:12:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 00:12:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:12:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:26,454 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:26,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:26,668 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:26,670 INFO L82 PathProgramCache]: Analyzing trace with hash -519784366, now seen corresponding path program 2 times [2020-12-23 00:12:26,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:26,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033991927] [2020-12-23 00:12:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:12:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033991927] [2020-12-23 00:12:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724394292] [2020-12-23 00:12:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:26,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:12:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:12:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:12:26,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:26,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:12:26,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485803769] [2020-12-23 00:12:26,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:12:26,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:12:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:12:26,906 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2020-12-23 00:12:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:27,002 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-12-23 00:12:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:12:27,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 00:12:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:27,006 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:12:27,009 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:12:27,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:12:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:12:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2020-12-23 00:12:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:12:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 00:12:27,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-12-23 00:12:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:27,022 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 00:12:27,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:12:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 00:12:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:12:27,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:27,023 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:27,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:27,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:27,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 3 times [2020-12-23 00:12:27,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:27,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712402429] [2020-12-23 00:12:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:12:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712402429] [2020-12-23 00:12:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276330667] [2020-12-23 00:12:27,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:27,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:12:27,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:27,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:12:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:12:27,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:27,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 00:12:27,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248624850] [2020-12-23 00:12:27,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:12:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:12:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:12:27,537 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-12-23 00:12:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:27,615 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 00:12:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:12:27,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 00:12:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:27,617 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:12:27,617 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:12:27,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:12:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:12:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-23 00:12:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:12:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 00:12:27,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-12-23 00:12:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:27,624 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 00:12:27,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:12:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 00:12:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:12:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:27,625 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:27,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:27,833 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash -696235598, now seen corresponding path program 4 times [2020-12-23 00:12:27,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:27,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916582795] [2020-12-23 00:12:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:12:27,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916582795] [2020-12-23 00:12:27,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587070435] [2020-12-23 00:12:27,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:28,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:12:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:12:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:12:28,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:28,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-12-23 00:12:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773150207] [2020-12-23 00:12:28,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:12:28,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:12:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:12:28,143 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 11 states. [2020-12-23 00:12:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:28,305 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:12:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:12:28,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-23 00:12:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:28,309 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:12:28,309 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:12:28,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:12:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:12:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2020-12-23 00:12:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:12:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 00:12:28,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-12-23 00:12:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:28,328 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 00:12:28,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:12:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 00:12:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:12:28,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:28,330 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:28,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:12:28,545 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1003861208, now seen corresponding path program 5 times [2020-12-23 00:12:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453779483] [2020-12-23 00:12:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:12:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453779483] [2020-12-23 00:12:28,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876138343] [2020-12-23 00:12:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:28,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:12:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:12:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:12:28,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:28,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2020-12-23 00:12:28,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169411662] [2020-12-23 00:12:28,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:12:28,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:28,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:12:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:12:28,909 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2020-12-23 00:12:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:29,005 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-12-23 00:12:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:12:29,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-23 00:12:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:29,006 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:12:29,007 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:12:29,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:12:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:12:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2020-12-23 00:12:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 00:12:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 00:12:29,013 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-12-23 00:12:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:29,014 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 00:12:29,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:12:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 00:12:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:12:29,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:29,015 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:29,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:29,230 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash -676746537, now seen corresponding path program 6 times [2020-12-23 00:12:29,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:29,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190722025] [2020-12-23 00:12:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:12:29,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190722025] [2020-12-23 00:12:29,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317982341] [2020-12-23 00:12:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:29,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:12:29,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:12:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:12:29,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:29,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:12:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289974994] [2020-12-23 00:12:29,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:12:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:12:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:12:29,691 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-12-23 00:12:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:29,754 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-23 00:12:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:12:29,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 00:12:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:29,756 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:12:29,756 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:12:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:12:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:12:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 30. [2020-12-23 00:12:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:12:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 00:12:29,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-12-23 00:12:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:29,763 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 00:12:29,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:12:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 00:12:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:12:29,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:29,764 INFO L422 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:29,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:29,978 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 547139987, now seen corresponding path program 7 times [2020-12-23 00:12:29,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:29,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638872912] [2020-12-23 00:12:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:12:30,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638872912] [2020-12-23 00:12:30,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149555797] [2020-12-23 00:12:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:12:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 00:12:30,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:30,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 22 [2020-12-23 00:12:30,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496414057] [2020-12-23 00:12:30,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:12:30,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:12:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:12:30,483 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 22 states. [2020-12-23 00:12:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:30,621 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-12-23 00:12:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:12:30,622 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-23 00:12:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:30,625 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:12:30,625 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 00:12:30,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:12:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 00:12:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 37. [2020-12-23 00:12:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:12:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 00:12:30,637 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-12-23 00:12:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:30,637 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 00:12:30,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:12:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 00:12:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:12:30,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:30,640 INFO L422 BasicCegarLoop]: trace histogram [19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:30,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:12:30,856 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1365801079, now seen corresponding path program 8 times [2020-12-23 00:12:30,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:30,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631756722] [2020-12-23 00:12:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-23 00:12:30,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631756722] [2020-12-23 00:12:30,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634992933] [2020-12-23 00:12:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:31,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:12:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:12:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 00:12:31,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:31,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 28 [2020-12-23 00:12:31,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724017169] [2020-12-23 00:12:31,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:12:31,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:12:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:12:31,323 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 28 states. [2020-12-23 00:12:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:31,468 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-12-23 00:12:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:12:31,468 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-12-23 00:12:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:31,470 INFO L225 Difference]: With dead ends: 99 [2020-12-23 00:12:31,470 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:12:31,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:12:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:12:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2020-12-23 00:12:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:12:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 00:12:31,478 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-12-23 00:12:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 00:12:31,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:12:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 00:12:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:12:31,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:31,480 INFO L422 BasicCegarLoop]: trace histogram [25, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:31,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:31,696 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -838959661, now seen corresponding path program 9 times [2020-12-23 00:12:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956078652] [2020-12-23 00:12:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-23 00:12:31,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956078652] [2020-12-23 00:12:31,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975945462] [2020-12-23 00:12:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:32,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:12:32,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:12:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-23 00:12:32,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:32,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:12:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134393159] [2020-12-23 00:12:32,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:12:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:12:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:12:32,121 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-12-23 00:12:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:32,207 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-12-23 00:12:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:12:32,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-23 00:12:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:32,208 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:12:32,208 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:12:32,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:12:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:12:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2020-12-23 00:12:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:12:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-23 00:12:32,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-12-23 00:12:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:32,219 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-23 00:12:32,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:12:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-23 00:12:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:12:32,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:32,220 INFO L422 BasicCegarLoop]: trace histogram [25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:32,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:12:32,433 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash -186499561, now seen corresponding path program 10 times [2020-12-23 00:12:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:32,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366694250] [2020-12-23 00:12:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-23 00:12:32,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366694250] [2020-12-23 00:12:32,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339675572] [2020-12-23 00:12:32,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:12:32,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:12:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:12:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:12:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:12:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:12:33,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:12:33,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28] total 36 [2020-12-23 00:12:33,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924079036] [2020-12-23 00:12:33,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:12:33,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:12:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:12:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:12:33,031 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 36 states. [2020-12-23 00:12:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:12:33,223 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-12-23 00:12:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 00:12:33,224 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-12-23 00:12:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:12:33,225 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:12:33,225 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:12:33,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:12:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:12:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2020-12-23 00:12:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 00:12:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-23 00:12:33,234 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 43 [2020-12-23 00:12:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:12:33,235 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-23 00:12:33,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:12:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-23 00:12:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 00:12:33,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:12:33,236 INFO L422 BasicCegarLoop]: trace histogram [33, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:12:33,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:12:33,451 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:12:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:12:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 365947091, now seen corresponding path program 11 times [2020-12-23 00:12:33,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:12:33,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948602137] [2020-12-23 00:12:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:12:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:12:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-12-23 00:12:33,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948602137] [2020-12-23 00:12:33,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362429520] [2020-12-23 00:12:33,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:09,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:14:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:14:09,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 00:14:09,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 00:14:10,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:10,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 36] total 44 [2020-12-23 00:14:10,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260963059] [2020-12-23 00:14:10,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:14:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:14:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:14:10,300 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 44 states. [2020-12-23 00:14:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:10,536 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2020-12-23 00:14:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 00:14:10,537 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-12-23 00:14:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:10,538 INFO L225 Difference]: With dead ends: 136 [2020-12-23 00:14:10,538 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 00:14:10,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:14:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 00:14:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 63. [2020-12-23 00:14:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:14:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-23 00:14:10,547 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 52 [2020-12-23 00:14:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:10,547 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-23 00:14:10,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:14:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-23 00:14:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:14:10,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:10,549 INFO L422 BasicCegarLoop]: trace histogram [41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:10,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:14:10,764 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 839622807, now seen corresponding path program 12 times [2020-12-23 00:14:10,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:10,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496710091] [2020-12-23 00:14:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-12-23 00:14:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496710091] [2020-12-23 00:14:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413359348] [2020-12-23 00:14:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:22,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:14:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:14:22,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:14:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-12-23 00:14:23,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:23,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:14:23,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899707120] [2020-12-23 00:14:23,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:14:23,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:14:23,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:14:23,011 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 15 states. [2020-12-23 00:14:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:23,118 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-12-23 00:14:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:14:23,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-12-23 00:14:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:23,120 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:14:23,120 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:14:23,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:14:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:14:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 64. [2020-12-23 00:14:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:14:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 00:14:23,128 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-12-23 00:14:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:23,129 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 00:14:23,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:14:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 00:14:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:14:23,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:23,130 INFO L422 BasicCegarLoop]: trace histogram [41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:23,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:14:23,345 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 309949395, now seen corresponding path program 13 times [2020-12-23 00:14:23,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:23,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583040666] [2020-12-23 00:14:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2020-12-23 00:14:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583040666] [2020-12-23 00:14:23,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149132599] [2020-12-23 00:14:23,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:14:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 00:14:24,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:24,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 44] total 53 [2020-12-23 00:14:24,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638498620] [2020-12-23 00:14:24,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 00:14:24,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:24,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 00:14:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:14:24,212 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 53 states. [2020-12-23 00:14:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:24,499 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2020-12-23 00:14:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 00:14:24,499 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-12-23 00:14:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:24,500 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:14:24,501 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:14:24,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:14:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:14:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-12-23 00:14:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:14:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 00:14:24,510 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 62 [2020-12-23 00:14:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:24,510 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 00:14:24,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 00:14:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 00:14:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 00:14:24,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:24,512 INFO L422 BasicCegarLoop]: trace histogram [50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:24,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:14:24,726 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1271174098, now seen corresponding path program 14 times [2020-12-23 00:14:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:24,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871647880] [2020-12-23 00:14:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2020-12-23 00:14:24,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871647880] [2020-12-23 00:14:24,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75759521] [2020-12-23 00:14:24,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:25,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:14:25,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:14:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 00:14:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 00:14:25,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:25,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 53] total 62 [2020-12-23 00:14:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962845748] [2020-12-23 00:14:25,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 00:14:25,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 00:14:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:14:25,801 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 62 states. [2020-12-23 00:14:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:26,108 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2020-12-23 00:14:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 00:14:26,108 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 72 [2020-12-23 00:14:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:26,109 INFO L225 Difference]: With dead ends: 175 [2020-12-23 00:14:26,110 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:14:26,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 00:14:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:14:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2020-12-23 00:14:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 00:14:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-23 00:14:26,118 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 72 [2020-12-23 00:14:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:26,118 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-23 00:14:26,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 00:14:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-23 00:14:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:14:26,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:26,120 INFO L422 BasicCegarLoop]: trace histogram [59, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:26,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:14:26,334 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -965065229, now seen corresponding path program 15 times [2020-12-23 00:14:26,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:26,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599282434] [2020-12-23 00:14:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-23 00:14:26,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599282434] [2020-12-23 00:14:26,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812006783] [2020-12-23 00:14:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:29,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:14:29,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:14:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:14:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-23 00:14:29,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:29,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:14:29,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723771486] [2020-12-23 00:14:29,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:14:29,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:14:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:14:29,968 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 18 states. [2020-12-23 00:14:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:30,105 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2020-12-23 00:14:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:14:30,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-23 00:14:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:30,107 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:14:30,107 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 00:14:30,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:14:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 00:14:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 85. [2020-12-23 00:14:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:14:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-12-23 00:14:30,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-12-23 00:14:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:30,114 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-12-23 00:14:30,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:14:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-12-23 00:14:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 00:14:30,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:30,115 INFO L422 BasicCegarLoop]: trace histogram [59, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:30,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:14:30,329 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 199195127, now seen corresponding path program 16 times [2020-12-23 00:14:30,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:30,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160236759] [2020-12-23 00:14:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-23 00:14:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160236759] [2020-12-23 00:14:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533010717] [2020-12-23 00:14:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 00:14:30,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:14:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:14:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 00:14:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:14:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-23 00:14:31,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:14:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 62] total 72 [2020-12-23 00:14:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108352628] [2020-12-23 00:14:31,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 00:14:31,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:14:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 00:14:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:14:31,522 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 72 states. [2020-12-23 00:14:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:14:31,928 INFO L93 Difference]: Finished difference Result 199 states and 213 transitions. [2020-12-23 00:14:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 00:14:31,929 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 83 [2020-12-23 00:14:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:14:31,930 INFO L225 Difference]: With dead ends: 199 [2020-12-23 00:14:31,930 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 00:14:31,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:14:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 00:14:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 96. [2020-12-23 00:14:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:14:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-23 00:14:31,940 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 83 [2020-12-23 00:14:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:14:31,941 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-23 00:14:31,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 00:14:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-23 00:14:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:14:31,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:14:31,943 INFO L422 BasicCegarLoop]: trace histogram [69, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:14:32,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:14:32,157 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:14:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:14:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1847475603, now seen corresponding path program 17 times [2020-12-23 00:14:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:14:32,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164113483] [2020-12-23 00:14:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:14:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:14:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2020-12-23 00:14:32,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164113483] [2020-12-23 00:14:32,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371981655] [2020-12-23 00:14:32,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true