/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:44:39,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:44:39,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:44:39,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:44:39,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:44:39,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:44:39,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:44:39,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:44:39,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:44:39,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:44:39,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:44:39,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:44:39,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:44:39,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:44:39,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:44:39,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:44:39,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:44:39,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:44:39,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:44:39,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:44:39,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:44:39,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:44:39,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:44:39,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:44:39,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:44:39,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:44:39,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:44:39,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:44:39,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:44:39,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:44:39,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:44:39,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:44:39,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:44:39,397 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:44:39,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:44:39,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:44:39,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:44:39,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:44:39,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:44:39,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:44:39,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:44:39,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:44:39,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:44:39,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:44:39,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:44:39,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:39,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:44:39,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:44:39,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:44:39,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:44:39,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:44:39,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:44:39,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:44:39,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:44:39,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:44:39,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:44:39,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:44:39,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:44:39,693 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:44:39,693 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-17 11:44:39,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68216e29/38131533bf574663a3e1199b4b544605/FLAGb2ad7641d [2020-07-17 11:44:40,223 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:44:40,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-17 11:44:40,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68216e29/38131533bf574663a3e1199b4b544605/FLAGb2ad7641d [2020-07-17 11:44:40,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68216e29/38131533bf574663a3e1199b4b544605 [2020-07-17 11:44:40,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:44:40,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:44:40,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:40,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:44:40,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:44:40,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6650b838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40, skipping insertion in model container [2020-07-17 11:44:40,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:44:40,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:44:40,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:40,823 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:44:40,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:40,855 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:44:40,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40 WrapperNode [2020-07-17 11:44:40,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:40,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:44:40,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:44:40,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:44:40,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... [2020-07-17 11:44:40,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:44:40,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:44:40,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:44:40,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:44:40,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:41,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:44:41,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:44:41,029 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-17 11:44:41,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:44:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:41,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:41,252 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:44:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:41 BoogieIcfgContainer [2020-07-17 11:44:41,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:41,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:41,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:41,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:41,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:44:40" (1/3) ... [2020-07-17 11:44:41,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f94c82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:41, skipping insertion in model container [2020-07-17 11:44:41,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:40" (2/3) ... [2020-07-17 11:44:41,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f94c82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:41, skipping insertion in model container [2020-07-17 11:44:41,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:41" (3/3) ... [2020-07-17 11:44:41,286 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-17 11:44:41,304 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:41,311 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:41,325 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:41,349 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:41,350 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:41,350 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:41,350 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:41,350 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:41,350 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:41,350 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:41,351 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-17 11:44:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 11:44:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:41,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:41,374 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-17 11:44:41,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:41,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752929623] [2020-07-17 11:44:41,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:41,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752929623] [2020-07-17 11:44:41,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841858634] [2020-07-17 11:44:41,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:41,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 11:44:41,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:41,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:41,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-17 11:44:41,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519654744] [2020-07-17 11:44:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 11:44:41,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 11:44:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:41,754 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-17 11:44:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:41,902 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-17 11:44:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:41,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-17 11:44:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:41,915 INFO L225 Difference]: With dead ends: 41 [2020-07-17 11:44:41,915 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 11:44:41,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:44:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 11:44:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 11:44:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 11:44:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-17 11:44:41,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-17 11:44:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:41,966 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-17 11:44:41,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 11:44:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-17 11:44:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 11:44:41,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:41,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:42,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-17 11:44:42,176 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-17 11:44:42,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:42,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245035700] [2020-07-17 11:44:42,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 11:44:42,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245035700] [2020-07-17 11:44:42,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:42,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:44:42,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223502238] [2020-07-17 11:44:42,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:44:42,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:44:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:44:42,316 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-17 11:44:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:42,391 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-17 11:44:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:42,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-17 11:44:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:42,393 INFO L225 Difference]: With dead ends: 29 [2020-07-17 11:44:42,393 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 11:44:42,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 11:44:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 11:44:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 11:44:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-17 11:44:42,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-17 11:44:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:42,404 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-17 11:44:42,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:44:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-17 11:44:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 11:44:42,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:42,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:42,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:44:42,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:42,408 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-17 11:44:42,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:42,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621093836] [2020-07-17 11:44:42,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-17 11:44:42,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621093836] [2020-07-17 11:44:42,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992062248] [2020-07-17 11:44:42,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:42,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:44:42,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:42,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-17 11:44:42,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-17 11:44:43,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:43,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-17 11:44:43,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61251294] [2020-07-17 11:44:43,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 11:44:43,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 11:44:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-07-17 11:44:43,083 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 21 states. [2020-07-17 11:44:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:43,636 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-07-17 11:44:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 11:44:43,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-07-17 11:44:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:43,639 INFO L225 Difference]: With dead ends: 43 [2020-07-17 11:44:43,639 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 11:44:43,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2020-07-17 11:44:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 11:44:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-17 11:44:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 11:44:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-17 11:44:43,654 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-17 11:44:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:43,663 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-17 11:44:43,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 11:44:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-17 11:44:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 11:44:43,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:43,668 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:43,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:43,883 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-17 11:44:43,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:43,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774235977] [2020-07-17 11:44:43,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-17 11:44:44,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774235977] [2020-07-17 11:44:44,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633308376] [2020-07-17 11:44:44,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:44:44,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-17 11:44:44,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:44,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-17 11:44:44,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055346642] [2020-07-17 11:44:44,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:44:44,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:44:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:44:44,106 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 9 states. [2020-07-17 11:44:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:44,196 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-07-17 11:44:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 11:44:44,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-07-17 11:44:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:44,198 INFO L225 Difference]: With dead ends: 54 [2020-07-17 11:44:44,198 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 11:44:44,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:44:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 11:44:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 11:44:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 11:44:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-07-17 11:44:44,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-07-17 11:44:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:44,207 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-07-17 11:44:44,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:44:44,207 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-07-17 11:44:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 11:44:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:44,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:44,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:44,427 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:44,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-17 11:44:44,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:44,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751911806] [2020-07-17 11:44:44,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-17 11:44:44,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751911806] [2020-07-17 11:44:44,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484141955] [2020-07-17 11:44:44,804 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:44,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-07-17 11:44:44,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:44,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-17 11:44:44,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 11:44:45,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:45,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-17 11:44:45,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100567235] [2020-07-17 11:44:45,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 11:44:45,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 11:44:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-07-17 11:44:45,303 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 32 states. [2020-07-17 11:44:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:45,963 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-17 11:44:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 11:44:45,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-17 11:44:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:45,965 INFO L225 Difference]: With dead ends: 39 [2020-07-17 11:44:45,965 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 11:44:45,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 11:44:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 11:44:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-17 11:44:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-17 11:44:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-07-17 11:44:45,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-07-17 11:44:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:45,979 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-07-17 11:44:45,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 11:44:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-07-17 11:44:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 11:44:45,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:45,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:46,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:46,199 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-07-17 11:44:46,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:46,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9215015] [2020-07-17 11:44:46,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-17 11:44:46,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9215015] [2020-07-17 11:44:46,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509251310] [2020-07-17 11:44:46,655 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:46,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:44:46,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:46,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-07-17 11:44:46,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-17 11:44:47,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:47,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2020-07-17 11:44:47,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680567497] [2020-07-17 11:44:47,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 11:44:47,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 11:44:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 11:44:47,375 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 37 states. [2020-07-17 11:44:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:48,231 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-17 11:44:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:44:48,231 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 51 [2020-07-17 11:44:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:48,233 INFO L225 Difference]: With dead ends: 42 [2020-07-17 11:44:48,233 INFO L226 Difference]: Without dead ends: 38 [2020-07-17 11:44:48,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=2047, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 11:44:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-17 11:44:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-17 11:44:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-17 11:44:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-17 11:44:48,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-07-17 11:44:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:48,243 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-17 11:44:48,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 11:44:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-17 11:44:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-17 11:44:48,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:48,245 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:48,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 11:44:48,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-07-17 11:44:48,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:48,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496832645] [2020-07-17 11:44:48,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-17 11:44:48,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496832645] [2020-07-17 11:44:48,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404589409] [2020-07-17 11:44:48,970 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:49,019 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-07-17 11:44:49,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:49,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-17 11:44:49,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-17 11:44:49,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:49,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 41 [2020-07-17 11:44:49,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055543867] [2020-07-17 11:44:49,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 11:44:49,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 11:44:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 11:44:49,842 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 41 states. [2020-07-17 11:44:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:51,086 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-17 11:44:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 11:44:51,087 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-07-17 11:44:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:51,089 INFO L225 Difference]: With dead ends: 45 [2020-07-17 11:44:51,090 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 11:44:51,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=241, Invalid=2621, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 11:44:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 11:44:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-07-17 11:44:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 11:44:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-17 11:44:51,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-07-17 11:44:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:51,103 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-17 11:44:51,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 11:44:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-17 11:44:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 11:44:51,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:51,105 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:51,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:51,311 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 6 times [2020-07-17 11:44:51,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:51,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074395157] [2020-07-17 11:44:51,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-17 11:44:51,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074395157] [2020-07-17 11:44:51,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486916510] [2020-07-17 11:44:51,690 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:51,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 11:44:51,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:51,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 72 conjunts are in the unsatisfiable core [2020-07-17 11:44:51,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-17 11:44:52,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:52,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2020-07-17 11:44:52,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757705853] [2020-07-17 11:44:52,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 11:44:52,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 11:44:52,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-07-17 11:44:52,221 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 27 states. [2020-07-17 11:44:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:52,818 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-07-17 11:44:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:44:52,818 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-07-17 11:44:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:52,819 INFO L225 Difference]: With dead ends: 49 [2020-07-17 11:44:52,820 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 11:44:52,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 11:44:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 11:44:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-07-17 11:44:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 11:44:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-07-17 11:44:52,835 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-07-17 11:44:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:52,835 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-07-17 11:44:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 11:44:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-07-17 11:44:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 11:44:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:52,837 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:53,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:53,041 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 7 times [2020-07-17 11:44:53,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:53,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113141304] [2020-07-17 11:44:53,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-17 11:44:53,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113141304] [2020-07-17 11:44:53,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848417411] [2020-07-17 11:44:53,700 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:53,743 WARN L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-17 11:44:53,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-17 11:44:54,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:54,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2020-07-17 11:44:54,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778357152] [2020-07-17 11:44:54,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 11:44:54,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 11:44:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 11:44:54,389 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 38 states. [2020-07-17 11:44:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:55,568 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-07-17 11:44:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 11:44:55,568 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 65 [2020-07-17 11:44:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:55,570 INFO L225 Difference]: With dead ends: 49 [2020-07-17 11:44:55,570 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 11:44:55,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 11:44:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 11:44:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-07-17 11:44:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 11:44:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-07-17 11:44:55,579 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-07-17 11:44:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:55,580 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-07-17 11:44:55,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 11:44:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-07-17 11:44:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 11:44:55,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:55,581 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:55,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 11:44:55,783 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 8 times [2020-07-17 11:44:55,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:55,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798085783] [2020-07-17 11:44:55,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-17 11:44:56,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798085783] [2020-07-17 11:44:56,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903262511] [2020-07-17 11:44:56,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:44:56,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:44:56,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:56,565 WARN L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-17 11:44:56,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-17 11:44:57,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:57,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2020-07-17 11:44:57,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997592484] [2020-07-17 11:44:57,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 11:44:57,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 11:44:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1855, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 11:44:57,597 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 45 states. [2020-07-17 11:44:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:59,101 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-07-17 11:44:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 11:44:59,102 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-07-17 11:44:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:59,104 INFO L225 Difference]: With dead ends: 50 [2020-07-17 11:44:59,104 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 11:44:59,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 11:44:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 11:44:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-07-17 11:44:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 11:44:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-07-17 11:44:59,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-07-17 11:44:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:59,115 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-07-17 11:44:59,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 11:44:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-07-17 11:44:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 11:44:59,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:59,116 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:59,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:59,322 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 9 times [2020-07-17 11:44:59,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:59,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528563864] [2020-07-17 11:44:59,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-17 11:45:00,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528563864] [2020-07-17 11:45:00,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791235559] [2020-07-17 11:45:00,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:00,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-07-17 11:45:00,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:00,151 WARN L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-17 11:45:00,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-17 11:45:01,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:01,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2020-07-17 11:45:01,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923872351] [2020-07-17 11:45:01,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 11:45:01,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 11:45:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 11:45:01,049 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 42 states. [2020-07-17 11:45:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:02,397 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-07-17 11:45:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 11:45:02,398 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-07-17 11:45:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:02,400 INFO L225 Difference]: With dead ends: 50 [2020-07-17 11:45:02,400 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 11:45:02,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=226, Invalid=2744, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 11:45:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 11:45:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-17 11:45:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 11:45:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-17 11:45:02,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-07-17 11:45:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:02,412 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-17 11:45:02,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 11:45:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-17 11:45:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 11:45:02,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:02,414 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:02,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:02,626 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 10 times [2020-07-17 11:45:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:02,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232116700] [2020-07-17 11:45:02,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-17 11:45:03,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232116700] [2020-07-17 11:45:03,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914982041] [2020-07-17 11:45:03,554 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:03,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:45:03,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:03,596 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-17 11:45:03,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-17 11:45:04,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:04,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2020-07-17 11:45:04,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996919892] [2020-07-17 11:45:04,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 11:45:04,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 11:45:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 11:45:04,558 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 44 states. [2020-07-17 11:45:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:06,158 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-17 11:45:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:45:06,159 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 79 [2020-07-17 11:45:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:06,161 INFO L225 Difference]: With dead ends: 52 [2020-07-17 11:45:06,161 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 11:45:06,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=246, Invalid=3176, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 11:45:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 11:45:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-17 11:45:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 11:45:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-07-17 11:45:06,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-07-17 11:45:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:06,172 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-07-17 11:45:06,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 11:45:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-07-17 11:45:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 11:45:06,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:06,173 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:06,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 11:45:06,388 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 11 times [2020-07-17 11:45:06,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921156149] [2020-07-17 11:45:06,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-17 11:45:07,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921156149] [2020-07-17 11:45:07,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108210635] [2020-07-17 11:45:07,111 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:07,158 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-07-17 11:45:07,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:07,160 WARN L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-17 11:45:07,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-17 11:45:08,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:08,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 49 [2020-07-17 11:45:08,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343835181] [2020-07-17 11:45:08,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 11:45:08,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 11:45:08,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 11:45:08,414 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 49 states. [2020-07-17 11:45:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:10,344 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-07-17 11:45:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:45:10,346 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 72 [2020-07-17 11:45:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:10,347 INFO L225 Difference]: With dead ends: 53 [2020-07-17 11:45:10,347 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 11:45:10,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=305, Invalid=3985, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 11:45:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 11:45:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-17 11:45:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 11:45:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-17 11:45:10,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-07-17 11:45:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:10,369 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-17 11:45:10,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 11:45:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-17 11:45:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 11:45:10,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:10,375 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:10,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-17 11:45:10,588 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 12 times [2020-07-17 11:45:10,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:10,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799517243] [2020-07-17 11:45:10,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-17 11:45:11,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799517243] [2020-07-17 11:45:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933640883] [2020-07-17 11:45:11,504 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:11,557 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-07-17 11:45:11,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:11,560 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-17 11:45:11,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-17 11:45:12,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:12,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 46 [2020-07-17 11:45:12,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55991777] [2020-07-17 11:45:12,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 11:45:12,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:12,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 11:45:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 11:45:12,664 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 46 states. [2020-07-17 11:45:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:14,254 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-07-17 11:45:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:45:14,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 79 [2020-07-17 11:45:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:14,257 INFO L225 Difference]: With dead ends: 55 [2020-07-17 11:45:14,258 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 11:45:14,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 11:45:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 11:45:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-07-17 11:45:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 11:45:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-07-17 11:45:14,268 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-07-17 11:45:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:14,268 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-07-17 11:45:14,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 11:45:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-07-17 11:45:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 11:45:14,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:14,270 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:14,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-17 11:45:14,480 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 13 times [2020-07-17 11:45:14,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:14,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471350910] [2020-07-17 11:45:14,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-17 11:45:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471350910] [2020-07-17 11:45:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304061262] [2020-07-17 11:45:15,497 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:15,541 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-17 11:45:15,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-17 11:45:16,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:16,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2020-07-17 11:45:16,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549285252] [2020-07-17 11:45:16,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 11:45:16,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 11:45:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 11:45:16,833 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 48 states. [2020-07-17 11:45:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:18,778 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-07-17 11:45:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:45:18,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 86 [2020-07-17 11:45:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:18,781 INFO L225 Difference]: With dead ends: 53 [2020-07-17 11:45:18,781 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 11:45:18,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 11:45:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 11:45:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-17 11:45:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 11:45:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-17 11:45:18,790 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-07-17 11:45:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:18,791 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-17 11:45:18,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 11:45:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-17 11:45:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 11:45:18,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:18,792 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:19,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:19,007 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 14 times [2020-07-17 11:45:19,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:19,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817882507] [2020-07-17 11:45:19,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 11:45:20,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817882507] [2020-07-17 11:45:20,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626657759] [2020-07-17 11:45:20,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:20,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:45:20,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:20,200 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-17 11:45:20,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-17 11:45:21,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:21,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2020-07-17 11:45:21,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537085447] [2020-07-17 11:45:21,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 11:45:21,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 11:45:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 11:45:21,474 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 50 states. [2020-07-17 11:45:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:23,594 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-07-17 11:45:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:45:23,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 93 [2020-07-17 11:45:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:23,597 INFO L225 Difference]: With dead ends: 55 [2020-07-17 11:45:23,597 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 11:45:23,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 11:45:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 11:45:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-17 11:45:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 11:45:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-07-17 11:45:23,606 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-07-17 11:45:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:23,606 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-07-17 11:45:23,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 11:45:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-07-17 11:45:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 11:45:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:23,608 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:23,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-17 11:45:23,817 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:23,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 15 times [2020-07-17 11:45:23,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:23,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791162192] [2020-07-17 11:45:23,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-17 11:45:24,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791162192] [2020-07-17 11:45:24,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49953725] [2020-07-17 11:45:24,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:24,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 11:45:24,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:24,824 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-17 11:45:24,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-17 11:45:26,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:26,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 53 [2020-07-17 11:45:26,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867563567] [2020-07-17 11:45:26,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 11:45:26,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 11:45:26,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 11:45:26,412 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 53 states. [2020-07-17 11:45:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:28,770 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-17 11:45:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:45:28,770 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 79 [2020-07-17 11:45:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:28,772 INFO L225 Difference]: With dead ends: 56 [2020-07-17 11:45:28,772 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 11:45:28,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=337, Invalid=4775, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 11:45:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 11:45:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-17 11:45:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:45:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-17 11:45:28,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-07-17 11:45:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:28,780 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-17 11:45:28,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 11:45:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-17 11:45:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 11:45:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:28,782 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:28,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-17 11:45:28,985 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 16 times [2020-07-17 11:45:28,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:28,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420229651] [2020-07-17 11:45:28,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-17 11:45:30,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420229651] [2020-07-17 11:45:30,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47726568] [2020-07-17 11:45:30,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:30,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:45:30,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:30,107 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-17 11:45:30,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-17 11:45:31,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:31,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2020-07-17 11:45:31,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923907786] [2020-07-17 11:45:31,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 11:45:31,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 11:45:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 11:45:31,493 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 50 states. [2020-07-17 11:45:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:33,600 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-17 11:45:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:45:33,600 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-07-17 11:45:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:33,602 INFO L225 Difference]: With dead ends: 58 [2020-07-17 11:45:33,602 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 11:45:33,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 11:45:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 11:45:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-17 11:45:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:45:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-17 11:45:33,609 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-07-17 11:45:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:33,610 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-17 11:45:33,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 11:45:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-17 11:45:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 11:45:33,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:33,611 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:33,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-17 11:45:33,825 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 17 times [2020-07-17 11:45:33,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:33,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399349634] [2020-07-17 11:45:33,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 11:45:35,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399349634] [2020-07-17 11:45:35,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992093748] [2020-07-17 11:45:35,151 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-17 11:45:35,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-07-17 11:45:35,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:35,240 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-17 11:45:35,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 7 proven. 199 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-17 11:45:36,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:36,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24] total 52 [2020-07-17 11:45:36,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767996737] [2020-07-17 11:45:36,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-17 11:45:36,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-17 11:45:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 11:45:36,776 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 52 states. [2020-07-17 11:45:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:39,112 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-07-17 11:45:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:45:39,113 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-17 11:45:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:39,115 INFO L225 Difference]: With dead ends: 58 [2020-07-17 11:45:39,115 INFO L226 Difference]: Without dead ends: 54 [2020-07-17 11:45:39,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=290, Invalid=4402, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 11:45:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-17 11:45:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-17 11:45:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:45:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-07-17 11:45:39,122 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-07-17 11:45:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:39,122 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-07-17 11:45:39,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-17 11:45:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-07-17 11:45:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-17 11:45:39,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:39,124 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:39,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:39,333 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 18 times [2020-07-17 11:45:39,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:39,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438369686] [2020-07-17 11:45:39,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-17 11:45:41,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438369686] [2020-07-17 11:45:41,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181906894] [2020-07-17 11:45:41,049 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:41,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-17 11:45:41,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:41,155 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-17 11:45:41,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 7 proven. 234 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-07-17 11:45:43,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:43,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2020-07-17 11:45:43,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126699248] [2020-07-17 11:45:43,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 11:45:43,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:43,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 11:45:43,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 11:45:43,223 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 54 states. [2020-07-17 11:45:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:45,463 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-07-17 11:45:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:45:45,464 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 100 [2020-07-17 11:45:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:45,465 INFO L225 Difference]: With dead ends: 56 [2020-07-17 11:45:45,465 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 11:45:45,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 11:45:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 11:45:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-17 11:45:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 11:45:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-17 11:45:45,471 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-07-17 11:45:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:45,472 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-17 11:45:45,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 11:45:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-17 11:45:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 11:45:45,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:45,473 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:45,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:45,685 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 19 times [2020-07-17 11:45:45,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:45,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378569211] [2020-07-17 11:45:45,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-17 11:45:47,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378569211] [2020-07-17 11:45:47,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463295434] [2020-07-17 11:45:47,456 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:47,543 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-17 11:45:47,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 272 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-07-17 11:45:49,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:49,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24] total 56 [2020-07-17 11:45:49,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642747060] [2020-07-17 11:45:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 11:45:49,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 11:45:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 11:45:49,474 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 56 states. [2020-07-17 11:45:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:52,316 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2020-07-17 11:45:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:45:52,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 107 [2020-07-17 11:45:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:52,319 INFO L225 Difference]: With dead ends: 58 [2020-07-17 11:45:52,319 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 11:45:52,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=318, Invalid=5232, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 11:45:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 11:45:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-17 11:45:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 11:45:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-07-17 11:45:52,325 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2020-07-17 11:45:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:52,326 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-07-17 11:45:52,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 11:45:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-07-17 11:45:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 11:45:52,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:52,327 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:52,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-17 11:45:52,540 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 20 times [2020-07-17 11:45:52,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:52,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318518715] [2020-07-17 11:45:52,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-17 11:45:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318518715] [2020-07-17 11:45:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728851232] [2020-07-17 11:45:53,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:45:53,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:45:53,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:45:53,834 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-07-17 11:45:53,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:45:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 47 proven. 161 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-17 11:45:55,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:45:55,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 57 [2020-07-17 11:45:55,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077265674] [2020-07-17 11:45:55,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-17 11:45:55,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:45:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-17 11:45:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3037, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 11:45:55,917 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 57 states. [2020-07-17 11:45:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:45:58,838 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-07-17 11:45:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:45:58,843 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2020-07-17 11:45:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:45:58,845 INFO L225 Difference]: With dead ends: 59 [2020-07-17 11:45:58,845 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 11:45:58,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=369, Invalid=5637, Unknown=0, NotChecked=0, Total=6006 [2020-07-17 11:45:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 11:45:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-17 11:45:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:45:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-17 11:45:58,856 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-07-17 11:45:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:45:58,857 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-17 11:45:58,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-17 11:45:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-17 11:45:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 11:45:58,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:45:58,858 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:45:59,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-17 11:45:59,066 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:45:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:45:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 21 times [2020-07-17 11:45:59,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:45:59,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219675850] [2020-07-17 11:45:59,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:45:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:45:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 11:46:00,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219675850] [2020-07-17 11:46:00,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145730908] [2020-07-17 11:46:00,401 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:00,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-07-17 11:46:00,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:00,457 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-17 11:46:00,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 209 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-17 11:46:02,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:02,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2020-07-17 11:46:02,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322094179] [2020-07-17 11:46:02,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 11:46:02,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:02,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 11:46:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2927, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 11:46:02,558 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 56 states. [2020-07-17 11:46:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:05,393 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-17 11:46:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:46:05,393 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 93 [2020-07-17 11:46:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:05,395 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:46:05,395 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 11:46:05,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=340, Invalid=5210, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 11:46:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 11:46:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-17 11:46:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:46:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-17 11:46:05,401 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2020-07-17 11:46:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:05,402 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-17 11:46:05,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 11:46:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-17 11:46:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-17 11:46:05,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:05,405 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:05,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:05,617 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 22 times [2020-07-17 11:46:05,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:05,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174275031] [2020-07-17 11:46:05,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-17 11:46:07,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174275031] [2020-07-17 11:46:07,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345121268] [2020-07-17 11:46:07,165 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:07,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:46:07,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:07,213 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-17 11:46:07,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-17 11:46:09,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:09,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 56 [2020-07-17 11:46:09,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149675464] [2020-07-17 11:46:09,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 11:46:09,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 11:46:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2933, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 11:46:09,175 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 56 states. [2020-07-17 11:46:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:12,256 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-17 11:46:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:46:12,257 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 100 [2020-07-17 11:46:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:12,258 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:46:12,258 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 11:46:12,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=318, Invalid=5232, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 11:46:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 11:46:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-17 11:46:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:46:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-17 11:46:12,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2020-07-17 11:46:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:12,266 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-17 11:46:12,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 11:46:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-17 11:46:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 11:46:12,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:12,267 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:12,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-17 11:46:12,481 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 23 times [2020-07-17 11:46:12,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:12,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145984782] [2020-07-17 11:46:12,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-17 11:46:14,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145984782] [2020-07-17 11:46:14,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158678550] [2020-07-17 11:46:14,157 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:14,218 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-07-17 11:46:14,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:14,222 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-17 11:46:14,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-07-17 11:46:16,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:16,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2020-07-17 11:46:16,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673470681] [2020-07-17 11:46:16,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-17 11:46:16,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:16,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-17 11:46:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3153, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 11:46:16,416 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 58 states. [2020-07-17 11:46:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:19,635 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-17 11:46:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:46:19,637 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 107 [2020-07-17 11:46:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:19,639 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:46:19,639 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 11:46:19,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=326, Invalid=5526, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 11:46:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 11:46:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-07-17 11:46:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:46:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-07-17 11:46:19,645 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2020-07-17 11:46:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:19,646 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-07-17 11:46:19,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-17 11:46:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-07-17 11:46:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-17 11:46:19,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:19,647 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:19,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:19,861 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 24 times [2020-07-17 11:46:19,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:19,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567107903] [2020-07-17 11:46:19,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-17 11:46:21,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567107903] [2020-07-17 11:46:21,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541120604] [2020-07-17 11:46:21,914 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:21,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-07-17 11:46:21,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:21,980 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-17 11:46:21,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-17 11:46:24,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:24,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2020-07-17 11:46:24,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298437919] [2020-07-17 11:46:24,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-17 11:46:24,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-17 11:46:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 11:46:24,480 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 60 states. [2020-07-17 11:46:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:28,102 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-07-17 11:46:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:46:28,104 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 114 [2020-07-17 11:46:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:28,105 INFO L225 Difference]: With dead ends: 59 [2020-07-17 11:46:28,106 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 11:46:28,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=334, Invalid=5828, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 11:46:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 11:46:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-17 11:46:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-17 11:46:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-17 11:46:28,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-07-17 11:46:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:28,113 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-17 11:46:28,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-17 11:46:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-17 11:46:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 11:46:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:28,116 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:28,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-17 11:46:28,330 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 326515792, now seen corresponding path program 25 times [2020-07-17 11:46:28,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:28,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337720526] [2020-07-17 11:46:28,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-17 11:46:29,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337720526] [2020-07-17 11:46:29,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989711974] [2020-07-17 11:46:29,460 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:29,500 WARN L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-17 11:46:29,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-17 11:46:33,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:33,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 46 [2020-07-17 11:46:33,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774314591] [2020-07-17 11:46:33,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 11:46:33,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:33,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 11:46:33,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 11:46:33,106 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 46 states. [2020-07-17 11:46:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:35,849 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2020-07-17 11:46:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 11:46:35,851 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 79 [2020-07-17 11:46:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:35,852 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:46:35,853 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 11:46:35,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=266, Invalid=3640, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 11:46:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 11:46:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-17 11:46:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 11:46:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2020-07-17 11:46:35,859 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 79 [2020-07-17 11:46:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:35,860 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2020-07-17 11:46:35,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 11:46:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2020-07-17 11:46:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 11:46:35,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:35,861 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:36,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-17 11:46:36,074 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 26 times [2020-07-17 11:46:36,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:36,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854141167] [2020-07-17 11:46:36,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-17 11:46:38,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854141167] [2020-07-17 11:46:38,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261364062] [2020-07-17 11:46:38,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:38,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:46:38,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:38,532 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-17 11:46:38,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 8 proven. 359 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-07-17 11:46:41,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:41,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 26] total 62 [2020-07-17 11:46:41,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759685715] [2020-07-17 11:46:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 11:46:41,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 11:46:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3617, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 11:46:41,507 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 62 states. [2020-07-17 11:46:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:45,554 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-07-17 11:46:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:46:45,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2020-07-17 11:46:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:45,558 INFO L225 Difference]: With dead ends: 61 [2020-07-17 11:46:45,558 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 11:46:45,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=354, Invalid=6452, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 11:46:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 11:46:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-07-17 11:46:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-17 11:46:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-07-17 11:46:45,563 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 121 [2020-07-17 11:46:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:45,564 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-07-17 11:46:45,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 11:46:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-07-17 11:46:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 11:46:45,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:45,564 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:45,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-17 11:46:45,765 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 27 times [2020-07-17 11:46:45,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:45,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666778218] [2020-07-17 11:46:45,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 11:46:47,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666778218] [2020-07-17 11:46:47,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368996711] [2020-07-17 11:46:47,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:47,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-07-17 11:46:47,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:47,313 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-17 11:46:47,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-17 11:46:50,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:50,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 61 [2020-07-17 11:46:50,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514136487] [2020-07-17 11:46:50,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-17 11:46:50,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:50,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-17 11:46:50,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 11:46:50,466 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 61 states. [2020-07-17 11:46:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:46:54,860 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-17 11:46:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:46:54,862 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 93 [2020-07-17 11:46:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:46:54,863 INFO L225 Difference]: With dead ends: 62 [2020-07-17 11:46:54,863 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 11:46:54,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=401, Invalid=6571, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 11:46:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 11:46:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-17 11:46:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:46:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:46:54,870 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2020-07-17 11:46:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:46:54,871 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:46:54,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-17 11:46:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:46:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-17 11:46:54,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:46:54,872 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:46:55,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-17 11:46:55,085 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:46:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:46:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 28 times [2020-07-17 11:46:55,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:46:55,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611118146] [2020-07-17 11:46:55,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:46:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:46:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-17 11:46:57,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611118146] [2020-07-17 11:46:57,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306302556] [2020-07-17 11:46:57,022 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:46:57,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:46:57,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:46:57,073 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-17 11:46:57,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:46:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-17 11:46:59,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:46:59,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 58 [2020-07-17 11:46:59,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538865500] [2020-07-17 11:46:59,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-17 11:46:59,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:46:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-17 11:46:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3155, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 11:46:59,932 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 58 states. [2020-07-17 11:47:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:04,102 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-17 11:47:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:47:04,104 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 100 [2020-07-17 11:47:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:04,105 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:47:04,105 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 11:47:04,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=338, Invalid=5824, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 11:47:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 11:47:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-17 11:47:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:47:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:47:04,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2020-07-17 11:47:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:04,112 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:47:04,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-17 11:47:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:47:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 11:47:04,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:04,113 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:47:04,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:04,326 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:47:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:47:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 29 times [2020-07-17 11:47:04,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:47:04,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320685443] [2020-07-17 11:47:04,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:47:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-17 11:47:06,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320685443] [2020-07-17 11:47:06,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73369208] [2020-07-17 11:47:06,501 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:06,561 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-07-17 11:47:06,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:47:06,565 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-17 11:47:06,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:47:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 9 proven. 276 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-07-17 11:47:09,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:47:09,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28] total 60 [2020-07-17 11:47:09,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201026921] [2020-07-17 11:47:09,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-17 11:47:09,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:47:09,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-17 11:47:09,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3383, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 11:47:09,648 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 60 states. [2020-07-17 11:47:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:14,221 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-17 11:47:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:47:14,222 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-07-17 11:47:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:14,223 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:47:14,224 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 11:47:14,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=346, Invalid=6134, Unknown=0, NotChecked=0, Total=6480 [2020-07-17 11:47:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 11:47:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-17 11:47:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:47:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:47:14,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2020-07-17 11:47:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:14,231 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:47:14,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-17 11:47:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:47:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-17 11:47:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:14,233 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:47:14,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:14,444 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:47:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:47:14,444 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 30 times [2020-07-17 11:47:14,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:47:14,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564398012] [2020-07-17 11:47:14,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:47:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-17 11:47:16,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564398012] [2020-07-17 11:47:16,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401174154] [2020-07-17 11:47:16,949 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:17,012 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-07-17 11:47:17,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:47:17,018 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-17 11:47:17,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:47:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 9 proven. 317 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-07-17 11:47:20,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:47:20,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28] total 62 [2020-07-17 11:47:20,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887632795] [2020-07-17 11:47:20,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 11:47:20,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:47:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 11:47:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 11:47:20,369 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 62 states. [2020-07-17 11:47:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:25,191 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-17 11:47:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:47:25,193 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 114 [2020-07-17 11:47:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:25,195 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:47:25,195 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 11:47:25,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=354, Invalid=6452, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 11:47:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 11:47:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-17 11:47:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:47:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:47:25,202 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2020-07-17 11:47:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:25,202 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:47:25,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 11:47:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:47:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 11:47:25,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:25,203 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:47:25,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:25,417 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:47:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:47:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 31 times [2020-07-17 11:47:25,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:47:25,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232638433] [2020-07-17 11:47:25,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:47:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-17 11:47:28,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232638433] [2020-07-17 11:47:28,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292209355] [2020-07-17 11:47:28,271 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:28,330 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-17 11:47:28,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:47:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-17 11:47:31,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:47:31,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28] total 64 [2020-07-17 11:47:31,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077262568] [2020-07-17 11:47:31,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 11:47:31,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:47:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 11:47:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 11:47:31,870 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 64 states. [2020-07-17 11:47:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:37,262 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-07-17 11:47:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:47:37,264 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 121 [2020-07-17 11:47:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:37,265 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:47:37,266 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 11:47:37,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=362, Invalid=6778, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 11:47:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 11:47:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-17 11:47:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:47:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:47:37,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2020-07-17 11:47:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:37,273 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:47:37,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 11:47:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:47:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-17 11:47:37,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:37,275 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:47:37,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-17 11:47:37,490 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:47:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:47:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 32 times [2020-07-17 11:47:37,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:47:37,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074461463] [2020-07-17 11:47:37,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:47:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-17 11:47:40,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074461463] [2020-07-17 11:47:40,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127977432] [2020-07-17 11:47:40,658 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:40,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:47:40,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:47:40,719 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-17 11:47:40,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:47:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 9 proven. 408 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-17 11:47:45,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:47:45,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 28] total 66 [2020-07-17 11:47:45,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118979079] [2020-07-17 11:47:45,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-17 11:47:45,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:47:45,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-17 11:47:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4115, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 11:47:45,312 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 66 states. [2020-07-17 11:47:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:51,134 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-17 11:47:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:47:51,136 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 128 [2020-07-17 11:47:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:51,138 INFO L225 Difference]: With dead ends: 62 [2020-07-17 11:47:51,138 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 11:47:51,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=370, Invalid=7112, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 11:47:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 11:47:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-17 11:47:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 11:47:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-17 11:47:51,144 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2020-07-17 11:47:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:51,145 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-17 11:47:51,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-17 11:47:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-17 11:47:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 11:47:51,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:51,146 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:47:51,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:51,360 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:47:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:47:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1286180007, now seen corresponding path program 33 times [2020-07-17 11:47:51,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:47:51,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670011598] [2020-07-17 11:47:51,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:47:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:47:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-17 11:47:53,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670011598] [2020-07-17 11:47:53,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360738386] [2020-07-17 11:47:53,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:47:53,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-07-17 11:47:53,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:47:53,111 WARN L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-17 11:47:53,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:47:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 172 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-17 11:47:55,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:47:55,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2020-07-17 11:47:55,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48287963] [2020-07-17 11:47:55,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 11:47:55,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:47:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 11:47:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 11:47:55,545 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 50 states. [2020-07-17 11:47:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:47:59,920 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-07-17 11:47:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:47:59,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-07-17 11:47:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:47:59,924 INFO L225 Difference]: With dead ends: 64 [2020-07-17 11:47:59,924 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 11:47:59,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=294, Invalid=4398, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 11:47:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 11:47:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-17 11:47:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:47:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2020-07-17 11:47:59,930 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 86 [2020-07-17 11:47:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:47:59,930 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2020-07-17 11:47:59,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 11:47:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2020-07-17 11:47:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-17 11:47:59,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:47:59,932 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:48:00,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-17 11:48:00,146 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:48:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:48:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1339978551, now seen corresponding path program 34 times [2020-07-17 11:48:00,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:48:00,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875463961] [2020-07-17 11:48:00,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:48:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-17 11:48:03,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875463961] [2020-07-17 11:48:03,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15607445] [2020-07-17 11:48:03,607 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:48:03,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:48:03,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:48:03,669 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-17 11:48:03,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:48:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-07-17 11:48:07,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:48:07,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 64 [2020-07-17 11:48:07,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398722491] [2020-07-17 11:48:07,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 11:48:07,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:48:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 11:48:07,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3861, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 11:48:07,774 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 64 states. [2020-07-17 11:48:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:48:13,721 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-07-17 11:48:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:48:13,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 128 [2020-07-17 11:48:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:48:13,724 INFO L225 Difference]: With dead ends: 62 [2020-07-17 11:48:13,724 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 11:48:13,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=350, Invalid=6456, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 11:48:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 11:48:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-07-17 11:48:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 11:48:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-17 11:48:13,731 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 128 [2020-07-17 11:48:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:48:13,732 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-17 11:48:13,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 11:48:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-17 11:48:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-17 11:48:13,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:48:13,733 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:48:13,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:48:13,947 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:48:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:48:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 35 times [2020-07-17 11:48:13,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:48:13,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294632125] [2020-07-17 11:48:13,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:48:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-17 11:48:18,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294632125] [2020-07-17 11:48:18,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183369267] [2020-07-17 11:48:18,323 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:48:18,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-07-17 11:48:18,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:48:18,401 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-17 11:48:18,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:48:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 9 proven. 458 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-07-17 11:48:23,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:48:23,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 28] total 68 [2020-07-17 11:48:23,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000693808] [2020-07-17 11:48:23,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 11:48:23,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:48:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 11:48:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 11:48:23,882 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 68 states. [2020-07-17 11:48:31,181 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:48:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:48:32,654 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-17 11:48:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:48:32,658 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 135 [2020-07-17 11:48:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:48:32,659 INFO L225 Difference]: With dead ends: 62 [2020-07-17 11:48:32,659 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 11:48:32,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=378, Invalid=7454, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 11:48:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 11:48:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-07-17 11:48:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 11:48:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-17 11:48:32,665 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2020-07-17 11:48:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:48:32,665 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-17 11:48:32,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 11:48:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-17 11:48:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-17 11:48:32,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:48:32,667 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:48:32,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-17 11:48:32,878 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:48:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:48:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 36 times [2020-07-17 11:48:32,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:48:32,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308562427] [2020-07-17 11:48:32,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:48:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-17 11:48:35,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308562427] [2020-07-17 11:48:35,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585212646] [2020-07-17 11:48:35,667 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:48:35,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-17 11:48:35,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:48:35,725 WARN L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 153 conjunts are in the unsatisfiable core [2020-07-17 11:48:35,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:48:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 57 proven. 230 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-07-17 11:48:41,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:48:41,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 64 [2020-07-17 11:48:41,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883511207] [2020-07-17 11:48:41,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 11:48:41,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:48:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 11:48:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 11:48:41,271 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 64 states. [2020-07-17 11:48:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:48:51,384 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-17 11:48:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:48:51,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 100 [2020-07-17 11:48:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:48:51,389 INFO L225 Difference]: With dead ends: 65 [2020-07-17 11:48:51,389 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 11:48:51,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=406, Invalid=7426, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 11:48:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 11:48:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-17 11:48:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:48:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:48:51,397 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2020-07-17 11:48:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:48:51,397 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:48:51,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 11:48:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:48:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 11:48:51,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:48:51,398 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:48:51,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-17 11:48:51,613 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:48:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:48:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 37 times [2020-07-17 11:48:51,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:48:51,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269085334] [2020-07-17 11:48:51,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:48:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-17 11:48:55,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269085334] [2020-07-17 11:48:55,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384794114] [2020-07-17 11:48:55,901 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:48:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:48:55,952 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-17 11:48:55,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:49:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-17 11:49:01,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:49:01,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30] total 62 [2020-07-17 11:49:01,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974094932] [2020-07-17 11:49:01,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 11:49:01,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:49:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 11:49:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3621, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 11:49:01,558 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 62 states. [2020-07-17 11:49:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:49:08,742 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-17 11:49:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:49:08,745 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 107 [2020-07-17 11:49:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:49:08,746 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:49:08,747 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 11:49:08,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=366, Invalid=6774, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 11:49:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 11:49:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 11:49:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:49:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:49:08,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2020-07-17 11:49:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:49:08,754 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:49:08,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 11:49:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:49:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-17 11:49:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:49:08,755 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:49:08,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-17 11:49:08,967 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:49:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:49:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 38 times [2020-07-17 11:49:08,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:49:08,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604735408] [2020-07-17 11:49:08,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:49:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-17 11:49:12,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604735408] [2020-07-17 11:49:12,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015239982] [2020-07-17 11:49:12,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:49:12,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:49:12,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:49:12,275 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-17 11:49:12,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:49:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 10 proven. 319 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-07-17 11:49:17,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:49:17,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30] total 64 [2020-07-17 11:49:17,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147091530] [2020-07-17 11:49:17,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 11:49:17,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:49:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 11:49:17,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3865, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 11:49:17,442 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 64 states. [2020-07-17 11:49:27,428 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-07-17 11:49:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:49:27,430 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-17 11:49:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:49:27,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 114 [2020-07-17 11:49:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:49:27,432 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:49:27,432 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 11:49:27,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=374, Invalid=7108, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 11:49:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 11:49:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 11:49:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:49:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:49:27,437 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2020-07-17 11:49:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:49:27,438 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:49:27,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 11:49:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:49:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 11:49:27,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:49:27,439 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:49:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-17 11:49:27,652 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:49:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:49:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 39 times [2020-07-17 11:49:27,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:49:27,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905500200] [2020-07-17 11:49:27,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:49:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-17 11:49:32,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905500200] [2020-07-17 11:49:32,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471309360] [2020-07-17 11:49:32,653 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:49:32,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-07-17 11:49:32,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:49:32,725 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-17 11:49:32,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:49:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 21 proven. 353 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-07-17 11:49:40,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:49:40,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 30] total 66 [2020-07-17 11:49:40,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117469485] [2020-07-17 11:49:40,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-17 11:49:40,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:49:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-17 11:49:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4117, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 11:49:40,164 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 66 states. [2020-07-17 11:49:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:49:50,984 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-17 11:49:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:49:50,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 121 [2020-07-17 11:49:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:49:50,985 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:49:50,985 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 11:49:50,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=382, Invalid=7450, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 11:49:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 11:49:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 11:49:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:49:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:49:50,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2020-07-17 11:49:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:49:50,992 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:49:50,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-17 11:49:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:49:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-17 11:49:50,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:49:50,993 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:49:51,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:49:51,206 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:49:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:49:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 40 times [2020-07-17 11:49:51,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:49:51,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616484665] [2020-07-17 11:49:51,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:49:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:49:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-17 11:49:55,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616484665] [2020-07-17 11:49:55,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383761245] [2020-07-17 11:49:55,929 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:49:55,986 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:49:55,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:49:55,991 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-17 11:49:55,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:50:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-07-17 11:50:02,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:50:02,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30] total 68 [2020-07-17 11:50:02,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846910291] [2020-07-17 11:50:02,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 11:50:02,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:50:02,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 11:50:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4377, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 11:50:02,929 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 68 states. [2020-07-17 11:50:13,618 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:50:14,028 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:50:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:50:15,194 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-17 11:50:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:50:15,199 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 128 [2020-07-17 11:50:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:50:15,200 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:50:15,200 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 11:50:15,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 11:50:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 11:50:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 11:50:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:50:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:50:15,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2020-07-17 11:50:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:50:15,208 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:50:15,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 11:50:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:50:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-17 11:50:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:50:15,219 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:50:15,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-17 11:50:15,433 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:50:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:50:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 41 times [2020-07-17 11:50:15,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:50:15,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518778785] [2020-07-17 11:50:15,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:50:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-17 11:50:23,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518778785] [2020-07-17 11:50:23,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208607979] [2020-07-17 11:50:23,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:50:23,682 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-07-17 11:50:23,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:50:23,699 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-17 11:50:23,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:50:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-17 11:50:33,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:50:33,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30] total 70 [2020-07-17 11:50:33,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281938585] [2020-07-17 11:50:33,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-17 11:50:33,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:50:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-17 11:50:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4645, Unknown=0, NotChecked=0, Total=4830 [2020-07-17 11:50:33,774 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 70 states. [2020-07-17 11:50:37,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:50:40,625 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:50:47,681 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:50:51,567 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:50:52,164 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:50:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:50:53,179 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-07-17 11:50:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:50:53,190 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 135 [2020-07-17 11:50:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:50:53,191 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:50:53,191 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 11:50:53,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=398, Invalid=8158, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 11:50:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 11:50:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-17 11:50:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:50:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:50:53,199 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2020-07-17 11:50:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:50:53,199 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:50:53,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-17 11:50:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:50:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-17 11:50:53,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:50:53,200 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:50:53,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:50:53,409 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:50:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:50:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 42 times [2020-07-17 11:50:53,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:50:53,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348566843] [2020-07-17 11:50:53,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:50:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:50:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-17 11:51:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348566843] [2020-07-17 11:51:02,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262249601] [2020-07-17 11:51:02,995 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:51:03,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-07-17 11:51:03,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:51:03,081 WARN L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-17 11:51:03,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:51:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-17 11:51:17,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:51:17,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 30] total 72 [2020-07-17 11:51:17,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979066871] [2020-07-17 11:51:17,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-17 11:51:17,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:51:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-17 11:51:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4921, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 11:51:17,184 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 72 states. [2020-07-17 11:51:31,647 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:51:32,147 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:51:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:51:33,518 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-17 11:51:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:51:33,526 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-07-17 11:51:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:51:33,527 INFO L225 Difference]: With dead ends: 65 [2020-07-17 11:51:33,527 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 11:51:33,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=406, Invalid=8524, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 11:51:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 11:51:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-17 11:51:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 11:51:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-17 11:51:33,532 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2020-07-17 11:51:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:51:33,533 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-17 11:51:33,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-17 11:51:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-17 11:51:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 11:51:33,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:51:33,534 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:51:33,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:51:33,746 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:51:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:51:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2017391546, now seen corresponding path program 43 times [2020-07-17 11:51:33,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:51:33,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296994930] [2020-07-17 11:51:33,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:51:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-07-17 11:51:37,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296994930] [2020-07-17 11:51:37,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817779235] [2020-07-17 11:51:37,047 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:51:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:37,095 WARN L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-17 11:51:37,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:51:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 2 proven. 207 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-17 11:51:42,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:51:42,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26] total 54 [2020-07-17 11:51:42,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39764080] [2020-07-17 11:51:42,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 11:51:42,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:51:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 11:51:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 11:51:42,987 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 54 states. [2020-07-17 11:51:48,118 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:51:55,528 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:51:56,026 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:51:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:51:56,030 INFO L93 Difference]: Finished difference Result 67 states and 99 transitions. [2020-07-17 11:51:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:51:56,031 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 93 [2020-07-17 11:51:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:51:56,032 INFO L225 Difference]: With dead ends: 67 [2020-07-17 11:51:56,032 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 11:51:56,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=322, Invalid=5228, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 11:51:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 11:51:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-17 11:51:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:51:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2020-07-17 11:51:56,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 93 [2020-07-17 11:51:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:51:56,039 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2020-07-17 11:51:56,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 11:51:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2020-07-17 11:51:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-17 11:51:56,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:51:56,041 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:51:56,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-07-17 11:51:56,249 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:51:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:51:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1270577827, now seen corresponding path program 44 times [2020-07-17 11:51:56,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:51:56,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787416245] [2020-07-17 11:51:56,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:51:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:51:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-17 11:52:05,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787416245] [2020-07-17 11:52:05,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099174279] [2020-07-17 11:52:05,736 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:52:05,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:52:05,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:52:05,812 WARN L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-17 11:52:05,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:52:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 9 proven. 511 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-17 11:52:16,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:52:16,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 28] total 70 [2020-07-17 11:52:16,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416950520] [2020-07-17 11:52:16,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-17 11:52:16,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:52:16,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-17 11:52:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4643, Unknown=0, NotChecked=0, Total=4830 [2020-07-17 11:52:16,744 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 70 states. [2020-07-17 11:52:31,807 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:52:32,562 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:52:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:52:32,565 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-07-17 11:52:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 11:52:32,566 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 142 [2020-07-17 11:52:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:52:32,567 INFO L225 Difference]: With dead ends: 65 [2020-07-17 11:52:32,567 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 11:52:32,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=386, Invalid=7804, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 11:52:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 11:52:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-17 11:52:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 11:52:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-07-17 11:52:32,573 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 142 [2020-07-17 11:52:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:52:32,573 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-07-17 11:52:32,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-17 11:52:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-07-17 11:52:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-17 11:52:32,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:52:32,575 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:52:32,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-17 11:52:32,782 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:52:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:52:32,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 45 times [2020-07-17 11:52:32,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:52:32,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144201422] [2020-07-17 11:52:32,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:52:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:52:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-07-17 11:52:41,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144201422] [2020-07-17 11:52:41,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833551907] [2020-07-17 11:52:41,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:52:41,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-07-17 11:52:41,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:52:41,548 WARN L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-17 11:52:41,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:52:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 21 proven. 559 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-07-17 11:52:52,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:52:52,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30] total 74 [2020-07-17 11:52:52,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407726272] [2020-07-17 11:52:52,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 11:52:52,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:52:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 11:52:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5205, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 11:52:52,951 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 74 states. [2020-07-17 11:53:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:53:07,867 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-17 11:53:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:53:07,873 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 149 [2020-07-17 11:53:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:53:07,875 INFO L225 Difference]: With dead ends: 65 [2020-07-17 11:53:07,875 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 11:53:07,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 162 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=414, Invalid=8898, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 11:53:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 11:53:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-07-17 11:53:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 11:53:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-17 11:53:07,881 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2020-07-17 11:53:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:53:07,881 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-17 11:53:07,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 11:53:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-17 11:53:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 11:53:07,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:53:07,883 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:53:08,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-17 11:53:08,096 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:53:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:53:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 46 times [2020-07-17 11:53:08,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:53:08,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296068612] [2020-07-17 11:53:08,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:53:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-17 11:53:12,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296068612] [2020-07-17 11:53:12,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186109329] [2020-07-17 11:53:12,875 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:53:12,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:53:12,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:53:12,931 WARN L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-17 11:53:12,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:53:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 62 proven. 269 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-07-17 11:53:23,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:53:23,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 69 [2020-07-17 11:53:23,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686070004] [2020-07-17 11:53:23,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-17 11:53:23,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:53:23,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-17 11:53:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4507, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 11:53:23,070 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 69 states. [2020-07-17 11:53:33,287 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:53:34,058 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:53:38,898 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-17 11:53:39,301 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-17 11:53:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:53:40,986 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-07-17 11:53:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:53:40,997 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 107 [2020-07-17 11:53:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:53:40,998 INFO L225 Difference]: With dead ends: 68 [2020-07-17 11:53:40,998 INFO L226 Difference]: Without dead ends: 64 [2020-07-17 11:53:40,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=465, Invalid=8655, Unknown=0, NotChecked=0, Total=9120 [2020-07-17 11:53:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-17 11:53:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-07-17 11:53:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:53:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:53:41,006 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2020-07-17 11:53:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:53:41,006 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:53:41,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-17 11:53:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:53:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-17 11:53:41,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:53:41,008 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:53:41,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:53:41,221 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:53:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:53:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 47 times [2020-07-17 11:53:41,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:53:41,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424103722] [2020-07-17 11:53:41,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:53:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:41,876 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-17 11:53:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:53:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-07-17 11:53:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424103722] [2020-07-17 11:53:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241066565] [2020-07-17 11:53:49,023 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:53:49,090 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-07-17 11:53:49,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:53:49,095 WARN L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-17 11:53:49,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:54:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 23 proven. 310 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2020-07-17 11:54:00,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:54:00,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32] total 66 [2020-07-17 11:54:00,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070654911] [2020-07-17 11:54:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-17 11:54:00,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:54:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-17 11:54:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4119, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 11:54:00,798 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 66 states. [2020-07-17 11:54:03,342 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-17 11:54:06,314 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:54:07,241 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-17 11:54:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:54:21,058 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-17 11:54:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:54:21,069 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 114 [2020-07-17 11:54:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:54:21,070 INFO L225 Difference]: With dead ends: 70 [2020-07-17 11:54:21,070 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:54:21,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=394, Invalid=7796, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 11:54:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:54:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-17 11:54:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:54:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:54:21,078 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 114 [2020-07-17 11:54:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:54:21,079 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:54:21,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-17 11:54:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:54:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 11:54:21,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:54:21,081 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:54:21,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-07-17 11:54:21,294 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:54:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:54:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1164219276, now seen corresponding path program 48 times [2020-07-17 11:54:21,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:54:21,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958252320] [2020-07-17 11:54:21,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:54:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:54:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-17 11:54:29,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958252320] [2020-07-17 11:54:29,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494031626] [2020-07-17 11:54:29,465 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:54:29,533 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-17 11:54:29,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:54:29,540 WARN L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-17 11:54:29,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:54:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 354 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-07-17 11:54:42,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:54:42,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 68 [2020-07-17 11:54:42,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218212392] [2020-07-17 11:54:42,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 11:54:42,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:54:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 11:54:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4379, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 11:54:42,231 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 68 states. [2020-07-17 11:54:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:54:59,647 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-17 11:54:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:54:59,656 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 121 [2020-07-17 11:54:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:54:59,657 INFO L225 Difference]: With dead ends: 70 [2020-07-17 11:54:59,657 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:54:59,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=402, Invalid=8154, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 11:54:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:54:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-17 11:54:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:54:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:54:59,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 121 [2020-07-17 11:54:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:54:59,665 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:54:59,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 11:54:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:54:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-17 11:54:59,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:54:59,667 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:54:59,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-17 11:54:59,880 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:54:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:54:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash 325513663, now seen corresponding path program 49 times [2020-07-17 11:54:59,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:54:59,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293510197] [2020-07-17 11:54:59,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:54:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-07-17 11:55:09,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293510197] [2020-07-17 11:55:09,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308687240] [2020-07-17 11:55:09,336 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:55:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:09,398 WARN L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-17 11:55:09,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:55:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 11 proven. 412 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2020-07-17 11:55:21,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:55:21,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 70 [2020-07-17 11:55:21,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616816894] [2020-07-17 11:55:21,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-17 11:55:21,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:55:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-17 11:55:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4647, Unknown=0, NotChecked=0, Total=4830 [2020-07-17 11:55:21,042 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 70 states. [2020-07-17 11:55:36,885 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-17 11:55:37,704 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-17 11:55:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:55:41,098 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-17 11:55:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:55:41,106 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 128 [2020-07-17 11:55:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:55:41,108 INFO L225 Difference]: With dead ends: 70 [2020-07-17 11:55:41,108 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:55:41,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=410, Invalid=8520, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 11:55:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:55:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-17 11:55:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:55:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:55:41,115 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 128 [2020-07-17 11:55:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:55:41,116 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:55:41,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-17 11:55:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:55:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-17 11:55:41,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:55:41,117 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:55:41,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:55:41,332 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:55:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:55:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash 634544554, now seen corresponding path program 50 times [2020-07-17 11:55:41,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:55:41,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368935015] [2020-07-17 11:55:41,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:55:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:55:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-07-17 11:55:50,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368935015] [2020-07-17 11:55:50,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276872026] [2020-07-17 11:55:50,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:55:50,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:55:50,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:55:50,943 WARN L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-17 11:55:50,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:56:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 11 proven. 463 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-07-17 11:56:07,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:56:07,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 32] total 72 [2020-07-17 11:56:07,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66585359] [2020-07-17 11:56:07,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-17 11:56:07,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:56:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-17 11:56:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4923, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 11:56:07,695 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 72 states. [2020-07-17 11:56:08,858 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-07-17 11:56:11,470 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:12,560 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:13,132 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:14,477 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:15,443 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:16,243 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:17,125 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:18,059 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:19,240 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:20,000 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:21,201 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:22,000 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:23,229 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:24,031 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:25,284 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:26,210 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:27,539 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:56:28,488 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:56:35,063 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:56:36,566 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:56:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:56:37,388 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-17 11:56:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:56:37,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 135 [2020-07-17 11:56:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:56:37,408 INFO L225 Difference]: With dead ends: 70 [2020-07-17 11:56:37,408 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:56:37,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=418, Invalid=8894, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 11:56:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:56:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-17 11:56:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:56:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:56:37,418 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 135 [2020-07-17 11:56:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:56:37,418 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:56:37,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-17 11:56:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:56:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-17 11:56:37,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:56:37,420 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:56:37,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-07-17 11:56:37,636 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:56:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:56:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1864653815, now seen corresponding path program 51 times [2020-07-17 11:56:37,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:56:37,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156557941] [2020-07-17 11:56:37,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:56:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:38,251 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-07-17 11:56:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:41,108 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-17 11:56:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:54,373 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-17 11:56:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:56:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-07-17 11:56:57,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156557941] [2020-07-17 11:56:57,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836416024] [2020-07-17 11:56:57,700 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:56:57,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-07-17 11:56:57,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:56:57,793 WARN L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-17 11:56:57,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:57:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 11 proven. 515 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2020-07-17 11:57:20,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:57:20,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 32] total 74 [2020-07-17 11:57:20,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045333460] [2020-07-17 11:57:20,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 11:57:20,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:57:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 11:57:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=5207, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 11:57:20,335 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 74 states. [2020-07-17 11:57:21,518 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-07-17 11:57:22,739 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-07-17 11:57:23,496 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-17 11:57:24,568 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-07-17 11:57:25,319 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:26,650 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:27,353 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:28,360 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:29,041 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:30,073 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:30,777 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:31,813 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:32,522 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:33,578 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:34,617 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:35,944 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:36,679 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:37,763 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:38,493 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:39,580 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:40,316 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:41,404 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-17 11:57:42,155 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-07-17 11:57:45,422 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:57:46,349 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-17 11:57:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:57:48,113 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-17 11:57:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 11:57:48,123 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 142 [2020-07-17 11:57:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:57:48,124 INFO L225 Difference]: With dead ends: 70 [2020-07-17 11:57:48,124 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:57:48,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=426, Invalid=9276, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 11:57:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:57:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-07-17 11:57:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 11:57:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-07-17 11:57:48,131 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 142 [2020-07-17 11:57:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:57:48,131 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-07-17 11:57:48,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 11:57:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-07-17 11:57:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-17 11:57:48,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:57:48,133 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:57:48,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:57:48,347 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:57:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:57:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1103515680, now seen corresponding path program 52 times [2020-07-17 11:57:48,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:57:48,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951693260] [2020-07-17 11:57:48,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:57:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:57:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-07-17 11:57:59,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951693260] [2020-07-17 11:57:59,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876615279] [2020-07-17 11:57:59,794 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:57:59,869 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:57:59,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:57:59,873 WARN L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-17 11:57:59,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 11 proven. 571 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-07-17 11:58:12,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:12,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 32] total 76 [2020-07-17 11:58:12,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679424186] [2020-07-17 11:58:12,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-17 11:58:12,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-17 11:58:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=5499, Unknown=0, NotChecked=0, Total=5700 [2020-07-17 11:58:12,694 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 76 states.