/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:44:30,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:44:30,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:44:30,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:44:30,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:44:30,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:44:30,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:44:30,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:44:30,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:44:30,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:44:30,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:44:30,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:44:30,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:44:30,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:44:30,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:44:30,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:44:30,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:44:30,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:44:30,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:44:30,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:44:30,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:44:30,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:44:30,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:44:30,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:44:30,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:44:31,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:44:31,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:44:31,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:44:31,002 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 [2020-07-19 21:44:31,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:44:31,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:44:31,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:44:31,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:44:31,020 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:44:31,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:44:31,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:44:31,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:44:31,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:44:31,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:44:31,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:44:31,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:44:31,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:44:31,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:44:31,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:44:31,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:44:31,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:44:31,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:44:31,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:44:31,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:44:31,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:44:31,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:31,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:44:31,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:44:31,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:44:31,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:44:31,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:44:31,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:44:31,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:44:31,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:44:31,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:44:31,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:44:31,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:44:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:44:31,393 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:44:31,394 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-19 21:44:31,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89511b043/38f98f274d8a421d8e86a7a784ab771c/FLAGe394a9269 [2020-07-19 21:44:32,186 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:44:32,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-19 21:44:32,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89511b043/38f98f274d8a421d8e86a7a784ab771c/FLAGe394a9269 [2020-07-19 21:44:32,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89511b043/38f98f274d8a421d8e86a7a784ab771c [2020-07-19 21:44:32,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:44:32,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:44:32,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:32,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:44:32,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:44:32,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b8014d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32, skipping insertion in model container [2020-07-19 21:44:32,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:44:32,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:44:32,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:32,689 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:44:32,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:32,727 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:44:32,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32 WrapperNode [2020-07-19 21:44:32,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:32,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:44:32,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:44:32,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:44:32,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (1/1) ... [2020-07-19 21:44:32,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:44:32,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:44:32,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:44:32,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:44:32,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (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 [2020-07-19 21:44:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:44:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:44:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:44:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-19 21:44:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:44:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 21:44:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:44:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:44:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 21:44:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:44:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:44:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:44:33,433 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:44:33,434 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:44:33,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:33 BoogieIcfgContainer [2020-07-19 21:44:33,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:44:33,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:44:33,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:44:33,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:44:33,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:32" (1/3) ... [2020-07-19 21:44:33,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb49771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:33, skipping insertion in model container [2020-07-19 21:44:33,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:32" (2/3) ... [2020-07-19 21:44:33,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb49771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:33, skipping insertion in model container [2020-07-19 21:44:33,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:33" (3/3) ... [2020-07-19 21:44:33,461 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-07-19 21:44:33,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:44:33,487 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:44:33,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:44:33,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:44:33,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:44:33,546 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:44:33,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:44:33,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:44:33,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:44:33,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:44:33,548 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:44:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 21:44:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:44:33,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-07-19 21:44:33,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421602614] [2020-07-19 21:44:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:33,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421602614] [2020-07-19 21:44:33,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:33,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:44:33,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664879728] [2020-07-19 21:44:33,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:44:33,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:44:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:33,987 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-19 21:44:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,182 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-07-19 21:44:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:34,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-19 21:44:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,198 INFO L225 Difference]: With dead ends: 59 [2020-07-19 21:44:34,199 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 21:44:34,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 21:44:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-07-19 21:44:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 21:44:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-19 21:44:34,255 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-07-19 21:44:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,256 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-19 21:44:34,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:44:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-19 21:44:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:44:34,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:44:34,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-07-19 21:44:34,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798584105] [2020-07-19 21:44:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:34,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798584105] [2020-07-19 21:44:34,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:34,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:44:34,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988533266] [2020-07-19 21:44:34,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:44:34,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:44:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:34,459 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-19 21:44:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,730 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 21:44:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:44:34,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 21:44:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,732 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:44:34,732 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:44:34,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:44:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:44:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 21:44:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:44:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-19 21:44:34,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-07-19 21:44:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,746 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-19 21:44:34,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:44:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-19 21:44:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:44:34,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:44:34,750 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-07-19 21:44:34,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504613021] [2020-07-19 21:44:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:35,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504613021] [2020-07-19 21:44:35,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349935176] [2020-07-19 21:44:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:35,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:35,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-07-19 21:44:35,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551519922] [2020-07-19 21:44:35,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:35,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:35,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:35,140 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-07-19 21:44:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:35,184 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-07-19 21:44:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:35,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:44:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:35,189 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:44:35,189 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 21:44:35,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 21:44:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-07-19 21:44:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:44:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-19 21:44:35,202 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-07-19 21:44:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:35,203 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-19 21:44:35,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-19 21:44:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:44:35,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:35,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:35,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:44:35,418 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 413319423, now seen corresponding path program 1 times [2020-07-19 21:44:35,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:35,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524282975] [2020-07-19 21:44:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:35,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524282975] [2020-07-19 21:44:35,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525458128] [2020-07-19 21:44:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:35,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:35,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-19 21:44:35,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171192864] [2020-07-19 21:44:35,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:35,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:35,593 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2020-07-19 21:44:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:35,612 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 21:44:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:35,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-19 21:44:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:35,614 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:44:35,615 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:44:35,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:44:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:44:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:44:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-19 21:44:35,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-19 21:44:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:35,624 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-19 21:44:35,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-19 21:44:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:44:35,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:35,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:35,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:35,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 20292413, now seen corresponding path program 1 times [2020-07-19 21:44:35,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:35,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690556305] [2020-07-19 21:44:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:35,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690556305] [2020-07-19 21:44:35,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545843454] [2020-07-19 21:44:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:36,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:36,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-07-19 21:44:36,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391094074] [2020-07-19 21:44:36,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:44:36,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:44:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:44:36,067 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-07-19 21:44:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:36,351 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-07-19 21:44:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:44:36,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-19 21:44:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:36,354 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:44:36,354 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:44:36,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:44:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-07-19 21:44:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:44:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-07-19 21:44:36,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2020-07-19 21:44:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:36,364 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-07-19 21:44:36,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:44:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-07-19 21:44:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:44:36,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:36,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:36,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:36,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash -40898518, now seen corresponding path program 2 times [2020-07-19 21:44:36,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:36,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20623082] [2020-07-19 21:44:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:36,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20623082] [2020-07-19 21:44:36,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981848349] [2020-07-19 21:44:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:44:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:37,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:37,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-19 21:44:37,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309229020] [2020-07-19 21:44:37,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:44:37,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:44:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:37,106 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2020-07-19 21:44:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:37,513 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-19 21:44:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:44:37,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-07-19 21:44:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:37,514 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:44:37,515 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:44:37,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:44:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-19 21:44:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 21:44:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-07-19 21:44:37,530 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-07-19 21:44:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:37,530 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-07-19 21:44:37,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:44:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-07-19 21:44:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:44:37,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:37,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:37,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:37,733 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -252625236, now seen corresponding path program 3 times [2020-07-19 21:44:37,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:37,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657145836] [2020-07-19 21:44:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:37,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657145836] [2020-07-19 21:44:37,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763185764] [2020-07-19 21:44:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:44:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:38,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-07-19 21:44:38,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235359660] [2020-07-19 21:44:38,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:44:38,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:44:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:38,087 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 14 states. [2020-07-19 21:44:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:38,464 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-07-19 21:44:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:44:38,465 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-19 21:44:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:38,466 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:44:38,467 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 21:44:38,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:44:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 21:44:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-19 21:44:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:44:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-19 21:44:38,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2020-07-19 21:44:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:38,478 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-19 21:44:38,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:44:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-19 21:44:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 21:44:38,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:38,481 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:38,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:44:38,695 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1858538322, now seen corresponding path program 4 times [2020-07-19 21:44:38,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:38,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127623254] [2020-07-19 21:44:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:38,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127623254] [2020-07-19 21:44:38,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541716353] [2020-07-19 21:44:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:44:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:39,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:39,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-07-19 21:44:39,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183860575] [2020-07-19 21:44:39,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:44:39,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:44:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:44:39,117 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 16 states. [2020-07-19 21:44:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,601 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-07-19 21:44:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:44:39,602 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-07-19 21:44:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,604 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:44:39,605 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:44:39,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:44:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 21:44:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 21:44:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-19 21:44:39,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-07-19 21:44:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,614 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-19 21:44:39,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:44:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-19 21:44:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:44:39,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:39,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1047212592, now seen corresponding path program 5 times [2020-07-19 21:44:39,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160870185] [2020-07-19 21:44:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:40,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160870185] [2020-07-19 21:44:40,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116942921] [2020-07-19 21:44:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:44:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:40,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:40,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-07-19 21:44:40,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595040037] [2020-07-19 21:44:40,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:44:40,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:40,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:44:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:40,369 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 18 states. [2020-07-19 21:44:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:40,875 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-07-19 21:44:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:44:40,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-07-19 21:44:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:40,876 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:44:40,876 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:44:40,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:44:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:44:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-19 21:44:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 21:44:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-19 21:44:40,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-07-19 21:44:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:40,884 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-19 21:44:40,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:44:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-19 21:44:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:44:40,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:40,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:41,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:41,089 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1745098546, now seen corresponding path program 6 times [2020-07-19 21:44:41,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:41,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989980375] [2020-07-19 21:44:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:41,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989980375] [2020-07-19 21:44:41,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970818776] [2020-07-19 21:44:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:44:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:41,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:41,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-07-19 21:44:41,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034526855] [2020-07-19 21:44:41,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:44:41,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:44:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:44:41,661 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 20 states. [2020-07-19 21:44:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:42,180 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-07-19 21:44:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:44:42,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-07-19 21:44:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:42,181 INFO L225 Difference]: With dead ends: 68 [2020-07-19 21:44:42,181 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:44:42,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:44:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:44:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-19 21:44:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:44:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-19 21:44:42,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2020-07-19 21:44:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:42,197 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-19 21:44:42,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:44:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-19 21:44:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:44:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:42,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:42,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:44:42,406 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:42,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1896365132, now seen corresponding path program 7 times [2020-07-19 21:44:42,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:42,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393670273] [2020-07-19 21:44:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:42,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393670273] [2020-07-19 21:44:42,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439788540] [2020-07-19 21:44:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:44:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:43,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:43,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-19 21:44:43,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356322761] [2020-07-19 21:44:43,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:44:43,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:44:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:44:43,038 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 22 states. [2020-07-19 21:44:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:43,665 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-07-19 21:44:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:44:43,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-07-19 21:44:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:43,667 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:44:43,667 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:44:43,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:44:43,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:44:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-19 21:44:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 21:44:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-07-19 21:44:43,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-07-19 21:44:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:43,677 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-07-19 21:44:43,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:44:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-19 21:44:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 21:44:43,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:43,678 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:43,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:43,892 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -944613450, now seen corresponding path program 8 times [2020-07-19 21:44:43,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:43,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382470848] [2020-07-19 21:44:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:44,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382470848] [2020-07-19 21:44:44,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373123226] [2020-07-19 21:44:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:44:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:44,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:44,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-07-19 21:44:44,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569692605] [2020-07-19 21:44:44,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:44:44,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:44:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:44,600 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 24 states. [2020-07-19 21:44:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:45,305 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-07-19 21:44:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:44:45,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-07-19 21:44:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:45,307 INFO L225 Difference]: With dead ends: 72 [2020-07-19 21:44:45,307 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:44:45,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:44:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:44:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 21:44:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:44:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-07-19 21:44:45,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2020-07-19 21:44:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:45,317 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-07-19 21:44:45,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:44:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-07-19 21:44:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 21:44:45,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:45,318 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:45,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:45,533 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1139281096, now seen corresponding path program 9 times [2020-07-19 21:44:45,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:45,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298721598] [2020-07-19 21:44:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:46,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298721598] [2020-07-19 21:44:46,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696485576] [2020-07-19 21:44:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:44:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:46,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:46,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-07-19 21:44:46,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081568802] [2020-07-19 21:44:46,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:44:46,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:44:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:44:46,345 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 26 states. [2020-07-19 21:44:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:47,130 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-07-19 21:44:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:44:47,130 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-07-19 21:44:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:47,131 INFO L225 Difference]: With dead ends: 74 [2020-07-19 21:44:47,131 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:44:47,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:44:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:44:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-19 21:44:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:44:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-07-19 21:44:47,145 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-07-19 21:44:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:47,148 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-07-19 21:44:47,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:44:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-07-19 21:44:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 21:44:47,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:47,153 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:47,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:44:47,366 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 10 times [2020-07-19 21:44:47,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:47,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888850316] [2020-07-19 21:44:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:47,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888850316] [2020-07-19 21:44:47,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196446716] [2020-07-19 21:44:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:44:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:48,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:48,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-07-19 21:44:48,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732828559] [2020-07-19 21:44:48,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 21:44:48,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:48,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 21:44:48,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:44:48,298 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 28 states. [2020-07-19 21:44:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:49,021 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-19 21:44:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:44:49,022 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-07-19 21:44:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:49,024 INFO L225 Difference]: With dead ends: 76 [2020-07-19 21:44:49,025 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:44:49,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:44:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:44:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-19 21:44:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:44:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-07-19 21:44:49,035 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-07-19 21:44:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:49,035 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-07-19 21:44:49,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 21:44:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-07-19 21:44:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:44:49,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:49,037 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:49,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:44:49,250 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 11 times [2020-07-19 21:44:49,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:49,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503650483] [2020-07-19 21:44:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:49,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503650483] [2020-07-19 21:44:49,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118987240] [2020-07-19 21:44:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:44:49,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:50,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:50,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2020-07-19 21:44:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334277978] [2020-07-19 21:44:50,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 21:44:50,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 21:44:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:44:50,394 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 30 states. [2020-07-19 21:44:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:51,254 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-07-19 21:44:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:44:51,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-07-19 21:44:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:51,255 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:44:51,256 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:44:51,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=499, Invalid=1481, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:44:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:44:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 21:44:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 21:44:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-19 21:44:51,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-07-19 21:44:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:51,264 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-19 21:44:51,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 21:44:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-19 21:44:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:44:51,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:51,265 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:51,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:44:51,479 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 12 times [2020-07-19 21:44:51,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:51,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906856681] [2020-07-19 21:44:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:52,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906856681] [2020-07-19 21:44:52,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764980679] [2020-07-19 21:44:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:44:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:53,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:53,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-07-19 21:44:53,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995754591] [2020-07-19 21:44:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 21:44:53,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 21:44:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:44:53,052 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 32 states. [2020-07-19 21:44:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:54,209 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-07-19 21:44:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:44:54,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-07-19 21:44:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:54,212 INFO L225 Difference]: With dead ends: 80 [2020-07-19 21:44:54,212 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 21:44:54,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:44:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 21:44:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 21:44:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:44:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-19 21:44:54,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-07-19 21:44:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:54,240 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-19 21:44:54,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 21:44:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-19 21:44:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 21:44:54,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:54,242 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:54,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:54,451 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 13 times [2020-07-19 21:44:54,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:54,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145106518] [2020-07-19 21:44:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:55,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145106518] [2020-07-19 21:44:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657043549] [2020-07-19 21:44:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:44:55,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:55,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:55,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-07-19 21:44:55,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478169819] [2020-07-19 21:44:55,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 21:44:55,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 21:44:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:44:55,885 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 34 states. [2020-07-19 21:44:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:56,936 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-07-19 21:44:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:44:56,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-07-19 21:44:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:56,938 INFO L225 Difference]: With dead ends: 82 [2020-07-19 21:44:56,939 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 21:44:56,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=648, Invalid=1902, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 21:44:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 21:44:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-19 21:44:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:44:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-19 21:44:56,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-07-19 21:44:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:56,945 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-19 21:44:56,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 21:44:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-19 21:44:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:44:56,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:56,946 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:57,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:44:57,151 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 14 times [2020-07-19 21:44:57,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:57,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041848288] [2020-07-19 21:44:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:57,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041848288] [2020-07-19 21:44:57,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709665261] [2020-07-19 21:44:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:44:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:44:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:44:58,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:58,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2020-07-19 21:44:58,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342263308] [2020-07-19 21:44:58,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 21:44:58,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 21:44:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 21:44:58,533 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 36 states. [2020-07-19 21:44:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:59,753 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-07-19 21:44:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:44:59,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-07-19 21:44:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:59,755 INFO L225 Difference]: With dead ends: 84 [2020-07-19 21:44:59,755 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 21:44:59,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:44:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 21:44:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-19 21:44:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:44:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-07-19 21:44:59,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-07-19 21:44:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:59,766 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-07-19 21:44:59,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 21:44:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-07-19 21:44:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:44:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:59,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:59,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:44:59,969 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 15 times [2020-07-19 21:44:59,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:59,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661322459] [2020-07-19 21:44:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:44:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:00,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661322459] [2020-07-19 21:45:00,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966844278] [2020-07-19 21:45:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:45:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:01,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:01,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2020-07-19 21:45:01,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626284507] [2020-07-19 21:45:01,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 21:45:01,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 21:45:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:45:01,514 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 38 states. [2020-07-19 21:45:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:02,831 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-07-19 21:45:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:45:02,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-07-19 21:45:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:02,834 INFO L225 Difference]: With dead ends: 86 [2020-07-19 21:45:02,834 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 21:45:02,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-07-19 21:45:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 21:45:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-07-19 21:45:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:45:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-07-19 21:45:02,839 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-07-19 21:45:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:02,840 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-07-19 21:45:02,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 21:45:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-07-19 21:45:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 21:45:02,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:02,841 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:03,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:03,043 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 16 times [2020-07-19 21:45:03,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:03,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039020654] [2020-07-19 21:45:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:03,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039020654] [2020-07-19 21:45:03,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277507303] [2020-07-19 21:45:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:45:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:04,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:04,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2020-07-19 21:45:04,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739595257] [2020-07-19 21:45:04,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 21:45:04,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:04,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 21:45:04,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 21:45:04,833 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-07-19 21:45:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:06,254 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-07-19 21:45:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:45:06,254 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-19 21:45:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:06,256 INFO L225 Difference]: With dead ends: 88 [2020-07-19 21:45:06,256 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:45:06,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=909, Invalid=2631, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:45:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:45:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-19 21:45:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 21:45:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-07-19 21:45:06,262 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-07-19 21:45:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:06,262 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-07-19 21:45:06,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 21:45:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-07-19 21:45:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-19 21:45:06,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:06,264 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:06,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:06,465 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 17 times [2020-07-19 21:45:06,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:06,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141093414] [2020-07-19 21:45:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:07,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141093414] [2020-07-19 21:45:07,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714256350] [2020-07-19 21:45:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:45:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:08,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:08,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2020-07-19 21:45:08,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496748142] [2020-07-19 21:45:08,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 21:45:08,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 21:45:08,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 21:45:08,470 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 42 states. [2020-07-19 21:45:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:09,916 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-19 21:45:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:45:09,917 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-07-19 21:45:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:09,917 INFO L225 Difference]: With dead ends: 90 [2020-07-19 21:45:09,918 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 21:45:09,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 21:45:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 21:45:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-19 21:45:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 21:45:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-07-19 21:45:09,923 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-07-19 21:45:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:09,924 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-07-19 21:45:09,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 21:45:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-07-19 21:45:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 21:45:09,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:09,925 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:10,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:10,135 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 18 times [2020-07-19 21:45:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112924008] [2020-07-19 21:45:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:11,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112924008] [2020-07-19 21:45:11,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646116539] [2020-07-19 21:45:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:11,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:45:11,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:12,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:12,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2020-07-19 21:45:12,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56550601] [2020-07-19 21:45:12,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 21:45:12,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 21:45:12,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:45:12,044 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 44 states. [2020-07-19 21:45:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:13,569 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-07-19 21:45:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:45:13,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 62 [2020-07-19 21:45:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:13,574 INFO L225 Difference]: With dead ends: 92 [2020-07-19 21:45:13,574 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 21:45:13,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1108, Invalid=3182, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 21:45:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 21:45:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-19 21:45:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 21:45:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-07-19 21:45:13,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-07-19 21:45:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:13,580 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-07-19 21:45:13,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 21:45:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-07-19 21:45:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 21:45:13,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:13,581 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:13,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:45:13,783 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 19 times [2020-07-19 21:45:13,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:13,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346639654] [2020-07-19 21:45:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:14,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346639654] [2020-07-19 21:45:14,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59471430] [2020-07-19 21:45:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:45:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:15,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:15,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-07-19 21:45:15,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285766967] [2020-07-19 21:45:15,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 21:45:15,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 21:45:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 21:45:15,791 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 46 states. [2020-07-19 21:45:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:17,456 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-07-19 21:45:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:45:17,457 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2020-07-19 21:45:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:17,458 INFO L225 Difference]: With dead ends: 94 [2020-07-19 21:45:17,458 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 21:45:17,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2020-07-19 21:45:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 21:45:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-19 21:45:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 21:45:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-07-19 21:45:17,464 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-07-19 21:45:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:17,464 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-07-19 21:45:17,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 21:45:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-07-19 21:45:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 21:45:17,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:17,465 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:17,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:45:17,671 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:17,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 20 times [2020-07-19 21:45:17,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:17,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780309808] [2020-07-19 21:45:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:19,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780309808] [2020-07-19 21:45:19,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606449228] [2020-07-19 21:45:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:19,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:45:19,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:20,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:20,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-07-19 21:45:20,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488177173] [2020-07-19 21:45:20,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-19 21:45:20,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-19 21:45:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1742, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 21:45:20,271 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 48 states. [2020-07-19 21:45:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:22,020 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-07-19 21:45:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:45:22,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-07-19 21:45:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:22,022 INFO L225 Difference]: With dead ends: 96 [2020-07-19 21:45:22,022 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 21:45:22,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1327, Invalid=3785, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 21:45:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 21:45:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-07-19 21:45:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-19 21:45:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-07-19 21:45:22,029 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-07-19 21:45:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:22,029 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-07-19 21:45:22,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-19 21:45:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-07-19 21:45:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:45:22,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:22,030 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:22,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:22,235 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:22,236 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 21 times [2020-07-19 21:45:22,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:22,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505334041] [2020-07-19 21:45:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:23,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505334041] [2020-07-19 21:45:23,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981298096] [2020-07-19 21:45:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:45:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:24,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:24,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 50 [2020-07-19 21:45:24,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830334353] [2020-07-19 21:45:24,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-19 21:45:24,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-19 21:45:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1890, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 21:45:24,764 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 50 states. [2020-07-19 21:45:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:26,912 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-07-19 21:45:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:45:26,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 68 [2020-07-19 21:45:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:26,915 INFO L225 Difference]: With dead ends: 98 [2020-07-19 21:45:26,915 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 21:45:26,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1444, Invalid=4106, Unknown=0, NotChecked=0, Total=5550 [2020-07-19 21:45:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 21:45:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-07-19 21:45:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 21:45:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-07-19 21:45:26,921 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-07-19 21:45:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:26,922 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-07-19 21:45:26,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-19 21:45:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-07-19 21:45:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-19 21:45:26,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:26,923 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:27,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 21:45:27,125 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 22 times [2020-07-19 21:45:27,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:27,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546495071] [2020-07-19 21:45:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:28,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546495071] [2020-07-19 21:45:28,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839089612] [2020-07-19 21:45:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:45:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:29,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:29,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2020-07-19 21:45:29,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629119509] [2020-07-19 21:45:29,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-19 21:45:29,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-19 21:45:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 21:45:29,820 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 52 states. [2020-07-19 21:45:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:31,800 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-07-19 21:45:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 21:45:31,801 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 70 [2020-07-19 21:45:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:31,802 INFO L225 Difference]: With dead ends: 100 [2020-07-19 21:45:31,802 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:45:31,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1566, Invalid=4440, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:45:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:45:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-19 21:45:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 21:45:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-07-19 21:45:31,806 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-07-19 21:45:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:31,806 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-07-19 21:45:31,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-19 21:45:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-07-19 21:45:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-19 21:45:31,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:31,807 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:32,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:32,017 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 23 times [2020-07-19 21:45:32,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:32,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791975396] [2020-07-19 21:45:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:33,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791975396] [2020-07-19 21:45:33,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825269264] [2020-07-19 21:45:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:45:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:35,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:35,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2020-07-19 21:45:35,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104005758] [2020-07-19 21:45:35,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-19 21:45:35,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-19 21:45:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 21:45:35,157 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 54 states. [2020-07-19 21:45:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:37,367 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-07-19 21:45:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 21:45:37,368 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-07-19 21:45:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:37,370 INFO L225 Difference]: With dead ends: 102 [2020-07-19 21:45:37,370 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 21:45:37,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1693, Invalid=4787, Unknown=0, NotChecked=0, Total=6480 [2020-07-19 21:45:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 21:45:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-07-19 21:45:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-19 21:45:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-07-19 21:45:37,377 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-07-19 21:45:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:37,377 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-07-19 21:45:37,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-19 21:45:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-07-19 21:45:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-19 21:45:37,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:37,379 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:37,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 21:45:37,586 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 24 times [2020-07-19 21:45:37,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:37,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100602678] [2020-07-19 21:45:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:39,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100602678] [2020-07-19 21:45:39,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767904177] [2020-07-19 21:45:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:45:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:41,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:41,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 56 [2020-07-19 21:45:41,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498658814] [2020-07-19 21:45:41,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-19 21:45:41,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-19 21:45:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=2370, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 21:45:41,617 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 56 states. [2020-07-19 21:45:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:44,009 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-07-19 21:45:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 21:45:44,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2020-07-19 21:45:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:44,011 INFO L225 Difference]: With dead ends: 104 [2020-07-19 21:45:44,011 INFO L226 Difference]: Without dead ends: 82 [2020-07-19 21:45:44,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1825, Invalid=5147, Unknown=0, NotChecked=0, Total=6972 [2020-07-19 21:45:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-19 21:45:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-07-19 21:45:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 21:45:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-07-19 21:45:44,017 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-07-19 21:45:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:44,017 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-07-19 21:45:44,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-19 21:45:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-07-19 21:45:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-19 21:45:44,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:44,019 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:44,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:45:44,222 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 25 times [2020-07-19 21:45:44,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:44,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708651097] [2020-07-19 21:45:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:46,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708651097] [2020-07-19 21:45:46,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842532241] [2020-07-19 21:45:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:46,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 21:45:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:47,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:47,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2020-07-19 21:45:47,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888808288] [2020-07-19 21:45:47,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-19 21:45:47,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-19 21:45:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=2542, Unknown=0, NotChecked=0, Total=3306 [2020-07-19 21:45:47,753 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 58 states. [2020-07-19 21:45:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:50,267 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-07-19 21:45:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 21:45:50,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-07-19 21:45:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:50,268 INFO L225 Difference]: With dead ends: 106 [2020-07-19 21:45:50,269 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 21:45:50,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1962, Invalid=5520, Unknown=0, NotChecked=0, Total=7482 [2020-07-19 21:45:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 21:45:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-19 21:45:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 21:45:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-07-19 21:45:50,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-07-19 21:45:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:50,274 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-07-19 21:45:50,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-19 21:45:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-07-19 21:45:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-19 21:45:50,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:50,275 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:50,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:45:50,479 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 26 times [2020-07-19 21:45:50,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:50,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440591215] [2020-07-19 21:45:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:52,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440591215] [2020-07-19 21:45:52,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255753061] [2020-07-19 21:45:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 21:45:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:54,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:54,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 60 [2020-07-19 21:45:54,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060111644] [2020-07-19 21:45:54,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-19 21:45:54,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:54,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-19 21:45:54,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2720, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 21:45:54,141 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 60 states. [2020-07-19 21:45:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:57,082 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-07-19 21:45:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 21:45:57,083 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-07-19 21:45:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:57,084 INFO L225 Difference]: With dead ends: 108 [2020-07-19 21:45:57,084 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 21:45:57,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2104, Invalid=5906, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 21:45:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 21:45:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-19 21:45:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 21:45:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-07-19 21:45:57,091 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-07-19 21:45:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:57,091 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-07-19 21:45:57,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-19 21:45:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-07-19 21:45:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 21:45:57,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:57,092 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:57,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:57,306 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 27 times [2020-07-19 21:45:57,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:57,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479204270] [2020-07-19 21:45:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:45:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:45:59,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479204270] [2020-07-19 21:45:59,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353527733] [2020-07-19 21:45:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:45:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 21:45:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:01,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:01,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 62 [2020-07-19 21:46:01,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623701392] [2020-07-19 21:46:01,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-19 21:46:01,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-19 21:46:01,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=2904, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:46:01,442 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 62 states. [2020-07-19 21:46:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:04,297 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-07-19 21:46:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 21:46:04,298 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-07-19 21:46:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:04,300 INFO L225 Difference]: With dead ends: 110 [2020-07-19 21:46:04,300 INFO L226 Difference]: Without dead ends: 88 [2020-07-19 21:46:04,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2251, Invalid=6305, Unknown=0, NotChecked=0, Total=8556 [2020-07-19 21:46:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-19 21:46:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-07-19 21:46:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:46:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-07-19 21:46:04,307 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-07-19 21:46:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:04,307 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-07-19 21:46:04,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-19 21:46:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-07-19 21:46:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 21:46:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:04,309 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-07-19 21:46:04,514 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 28 times [2020-07-19 21:46:04,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:04,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989560913] [2020-07-19 21:46:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:06,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989560913] [2020-07-19 21:46:06,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633112434] [2020-07-19 21:46:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:46:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 21:46:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:09,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:09,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2020-07-19 21:46:09,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230086305] [2020-07-19 21:46:09,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-19 21:46:09,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-19 21:46:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=3094, Unknown=0, NotChecked=0, Total=4032 [2020-07-19 21:46:09,010 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 64 states. [2020-07-19 21:46:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:12,206 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-07-19 21:46:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 21:46:12,207 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 82 [2020-07-19 21:46:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:12,208 INFO L225 Difference]: With dead ends: 112 [2020-07-19 21:46:12,208 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 21:46:12,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2403, Invalid=6717, Unknown=0, NotChecked=0, Total=9120 [2020-07-19 21:46:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 21:46:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-07-19 21:46:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 21:46:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-07-19 21:46:12,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-07-19 21:46:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:12,214 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-07-19 21:46:12,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-19 21:46:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-07-19 21:46:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-19 21:46:12,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:12,215 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:12,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:12,418 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 29 times [2020-07-19 21:46:12,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:12,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737064728] [2020-07-19 21:46:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:14,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737064728] [2020-07-19 21:46:14,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452745402] [2020-07-19 21:46:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:46:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 21:46:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:17,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:17,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2020-07-19 21:46:17,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683795475] [2020-07-19 21:46:17,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-19 21:46:17,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-19 21:46:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 21:46:17,379 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 66 states. [2020-07-19 21:46:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:21,729 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-07-19 21:46:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 21:46:21,730 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 84 [2020-07-19 21:46:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:21,732 INFO L225 Difference]: With dead ends: 114 [2020-07-19 21:46:21,732 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 21:46:21,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2560, Invalid=7142, Unknown=0, NotChecked=0, Total=9702 [2020-07-19 21:46:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 21:46:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-07-19 21:46:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 21:46:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-07-19 21:46:21,738 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-07-19 21:46:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:21,738 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-07-19 21:46:21,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-19 21:46:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-07-19 21:46:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-19 21:46:21,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:21,739 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:21,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-19 21:46:21,945 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 30 times [2020-07-19 21:46:21,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:21,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61542178] [2020-07-19 21:46:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:24,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61542178] [2020-07-19 21:46:24,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481362346] [2020-07-19 21:46:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:46:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:24,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 21:46:24,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:27,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:27,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2020-07-19 21:46:27,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046543420] [2020-07-19 21:46:27,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-19 21:46:27,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-19 21:46:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=3492, Unknown=0, NotChecked=0, Total=4556 [2020-07-19 21:46:27,476 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 68 states. [2020-07-19 21:46:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:31,993 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-07-19 21:46:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 21:46:31,995 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 86 [2020-07-19 21:46:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:31,997 INFO L225 Difference]: With dead ends: 116 [2020-07-19 21:46:31,997 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 21:46:31,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2722, Invalid=7580, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:46:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 21:46:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-07-19 21:46:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 21:46:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-07-19 21:46:32,003 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-07-19 21:46:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:32,003 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-07-19 21:46:32,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-19 21:46:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-07-19 21:46:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-19 21:46:32,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:32,004 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:32,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 21:46:32,205 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 740735460, now seen corresponding path program 31 times [2020-07-19 21:46:32,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:32,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894496942] [2020-07-19 21:46:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:35,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894496942] [2020-07-19 21:46:35,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747649203] [2020-07-19 21:46:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:46:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 21:46:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:37,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:37,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 70 [2020-07-19 21:46:37,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315041770] [2020-07-19 21:46:37,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-19 21:46:37,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-19 21:46:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=3700, Unknown=0, NotChecked=0, Total=4830 [2020-07-19 21:46:37,610 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 70 states. [2020-07-19 21:46:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:41,845 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-07-19 21:46:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 21:46:41,847 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 88 [2020-07-19 21:46:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:41,849 INFO L225 Difference]: With dead ends: 118 [2020-07-19 21:46:41,849 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 21:46:41,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2889, Invalid=8031, Unknown=0, NotChecked=0, Total=10920 [2020-07-19 21:46:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 21:46:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-07-19 21:46:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-19 21:46:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-07-19 21:46:41,858 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-07-19 21:46:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:41,858 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-07-19 21:46:41,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-19 21:46:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-07-19 21:46:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-19 21:46:41,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:41,859 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:42,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 21:46:42,070 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash -721649178, now seen corresponding path program 32 times [2020-07-19 21:46:42,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:42,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748386560] [2020-07-19 21:46:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:46,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748386560] [2020-07-19 21:46:46,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224641999] [2020-07-19 21:46:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:46:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 21:46:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:46:50,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:50,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36] total 72 [2020-07-19 21:46:50,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138791919] [2020-07-19 21:46:50,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-19 21:46:50,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-19 21:46:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=3914, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 21:46:50,940 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 72 states. [2020-07-19 21:46:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:56,945 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-07-19 21:46:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 21:46:56,947 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2020-07-19 21:46:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:56,951 INFO L225 Difference]: With dead ends: 120 [2020-07-19 21:46:56,952 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 21:46:56,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3061, Invalid=8495, Unknown=0, NotChecked=0, Total=11556 [2020-07-19 21:46:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 21:46:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-07-19 21:46:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-19 21:46:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-07-19 21:46:56,959 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-07-19 21:46:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:56,960 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-07-19 21:46:56,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-19 21:46:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-07-19 21:46:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 21:46:56,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:56,961 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:57,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 21:46:57,175 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1618980504, now seen corresponding path program 33 times [2020-07-19 21:46:57,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:57,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464579244] [2020-07-19 21:46:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:46:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:01,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464579244] [2020-07-19 21:47:01,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550470640] [2020-07-19 21:47:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:47:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 21:47:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:04,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:04,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37] total 74 [2020-07-19 21:47:04,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875028725] [2020-07-19 21:47:04,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-19 21:47:04,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-19 21:47:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=4134, Unknown=0, NotChecked=0, Total=5402 [2020-07-19 21:47:04,671 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 74 states. [2020-07-19 21:47:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:08,885 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-07-19 21:47:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 21:47:08,886 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 92 [2020-07-19 21:47:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:08,888 INFO L225 Difference]: With dead ends: 122 [2020-07-19 21:47:08,888 INFO L226 Difference]: Without dead ends: 100 [2020-07-19 21:47:08,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3238, Invalid=8972, Unknown=0, NotChecked=0, Total=12210 [2020-07-19 21:47:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-19 21:47:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-07-19 21:47:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 21:47:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-07-19 21:47:08,899 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-07-19 21:47:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:08,900 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-07-19 21:47:08,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-19 21:47:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-07-19 21:47:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 21:47:08,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:08,902 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:09,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 21:47:09,115 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:09,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:09,115 INFO L82 PathProgramCache]: Analyzing trace with hash -665958294, now seen corresponding path program 34 times [2020-07-19 21:47:09,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:09,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856055944] [2020-07-19 21:47:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:47:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856055944] [2020-07-19 21:47:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072841720] [2020-07-19 21:47:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:47:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 21:47:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:15,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:15,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 76 [2020-07-19 21:47:15,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287966341] [2020-07-19 21:47:15,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-19 21:47:15,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-19 21:47:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1340, Invalid=4360, Unknown=0, NotChecked=0, Total=5700 [2020-07-19 21:47:15,426 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 76 states. [2020-07-19 21:47:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:19,628 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-07-19 21:47:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 21:47:19,629 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2020-07-19 21:47:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:19,630 INFO L225 Difference]: With dead ends: 124 [2020-07-19 21:47:19,630 INFO L226 Difference]: Without dead ends: 102 [2020-07-19 21:47:19,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3420, Invalid=9462, Unknown=0, NotChecked=0, Total=12882 [2020-07-19 21:47:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-19 21:47:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-07-19 21:47:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 21:47:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-07-19 21:47:19,635 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-07-19 21:47:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:19,636 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-07-19 21:47:19,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-19 21:47:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-07-19 21:47:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 21:47:19,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:19,637 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:19,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 21:47:19,849 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:19,849 INFO L82 PathProgramCache]: Analyzing trace with hash 360351468, now seen corresponding path program 35 times [2020-07-19 21:47:19,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:19,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891528630] [2020-07-19 21:47:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:47:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891528630] [2020-07-19 21:47:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31875756] [2020-07-19 21:47:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:47:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 21:47:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:26,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:26,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 78 [2020-07-19 21:47:26,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269046609] [2020-07-19 21:47:26,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-19 21:47:26,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-19 21:47:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1414, Invalid=4592, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 21:47:26,693 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 78 states. [2020-07-19 21:47:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:31,572 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-07-19 21:47:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-19 21:47:31,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 96 [2020-07-19 21:47:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:31,574 INFO L225 Difference]: With dead ends: 126 [2020-07-19 21:47:31,575 INFO L226 Difference]: Without dead ends: 104 [2020-07-19 21:47:31,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3607, Invalid=9965, Unknown=0, NotChecked=0, Total=13572 [2020-07-19 21:47:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-19 21:47:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-07-19 21:47:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-19 21:47:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-07-19 21:47:31,581 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-07-19 21:47:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:31,581 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-07-19 21:47:31,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-19 21:47:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-07-19 21:47:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 21:47:31,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:31,582 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:31,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 21:47:31,796 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1198445330, now seen corresponding path program 36 times [2020-07-19 21:47:31,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:31,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978071458] [2020-07-19 21:47:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:47:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:35,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978071458] [2020-07-19 21:47:35,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919141008] [2020-07-19 21:47:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:47:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 21:47:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:39,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:39,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40] total 80 [2020-07-19 21:47:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419199566] [2020-07-19 21:47:39,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-19 21:47:39,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-19 21:47:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=4830, Unknown=0, NotChecked=0, Total=6320 [2020-07-19 21:47:39,487 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 80 states. [2020-07-19 21:47:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:44,745 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-07-19 21:47:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 21:47:44,747 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2020-07-19 21:47:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:44,748 INFO L225 Difference]: With dead ends: 128 [2020-07-19 21:47:44,748 INFO L226 Difference]: Without dead ends: 106 [2020-07-19 21:47:44,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3799, Invalid=10481, Unknown=0, NotChecked=0, Total=14280 [2020-07-19 21:47:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-19 21:47:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-07-19 21:47:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 21:47:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-07-19 21:47:44,753 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-07-19 21:47:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:44,753 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-07-19 21:47:44,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-19 21:47:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-07-19 21:47:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 21:47:44,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:44,754 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:44,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 21:47:44,955 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:44,955 INFO L82 PathProgramCache]: Analyzing trace with hash -258581904, now seen corresponding path program 37 times [2020-07-19 21:47:44,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:44,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613690454] [2020-07-19 21:47:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:47:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:48,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613690454] [2020-07-19 21:47:48,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089861103] [2020-07-19 21:47:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:47:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 21:47:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:47:53,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:53,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41] total 82 [2020-07-19 21:47:53,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373367773] [2020-07-19 21:47:53,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-19 21:47:53,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:53,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-19 21:47:53,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1568, Invalid=5074, Unknown=0, NotChecked=0, Total=6642 [2020-07-19 21:47:53,320 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 82 states. [2020-07-19 21:47:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:58,975 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-07-19 21:47:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-19 21:47:58,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 100 [2020-07-19 21:47:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:58,977 INFO L225 Difference]: With dead ends: 130 [2020-07-19 21:47:58,978 INFO L226 Difference]: Without dead ends: 108 [2020-07-19 21:47:58,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3996, Invalid=11010, Unknown=0, NotChecked=0, Total=15006 [2020-07-19 21:47:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-19 21:47:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-07-19 21:47:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-19 21:47:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-07-19 21:47:58,983 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-07-19 21:47:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:58,984 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-07-19 21:47:58,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-19 21:47:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-07-19 21:47:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 21:47:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:58,985 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:59,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:59,187 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038322, now seen corresponding path program 38 times [2020-07-19 21:47:59,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:59,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749899223] [2020-07-19 21:47:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:47:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:03,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749899223] [2020-07-19 21:48:03,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364635025] [2020-07-19 21:48:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:48:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 21:48:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:08,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:08,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42] total 84 [2020-07-19 21:48:08,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022278515] [2020-07-19 21:48:08,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-19 21:48:08,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-19 21:48:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1648, Invalid=5324, Unknown=0, NotChecked=0, Total=6972 [2020-07-19 21:48:08,365 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 84 states. [2020-07-19 21:48:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:14,404 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-07-19 21:48:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 21:48:14,406 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 102 [2020-07-19 21:48:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:14,407 INFO L225 Difference]: With dead ends: 132 [2020-07-19 21:48:14,407 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 21:48:14,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4198, Invalid=11552, Unknown=0, NotChecked=0, Total=15750 [2020-07-19 21:48:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 21:48:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-07-19 21:48:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-19 21:48:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-07-19 21:48:14,413 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2020-07-19 21:48:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:14,414 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-07-19 21:48:14,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-19 21:48:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-07-19 21:48:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-19 21:48:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:14,415 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:14,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:14,622 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1792330740, now seen corresponding path program 39 times [2020-07-19 21:48:14,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:14,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980156235] [2020-07-19 21:48:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:48:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:19,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980156235] [2020-07-19 21:48:19,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146936764] [2020-07-19 21:48:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:48:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 21:48:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:23,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:23,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43] total 86 [2020-07-19 21:48:24,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585487960] [2020-07-19 21:48:24,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-19 21:48:24,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-19 21:48:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2020-07-19 21:48:24,001 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 86 states. [2020-07-19 21:48:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:30,435 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-07-19 21:48:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 21:48:30,437 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 104 [2020-07-19 21:48:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:30,438 INFO L225 Difference]: With dead ends: 134 [2020-07-19 21:48:30,439 INFO L226 Difference]: Without dead ends: 112 [2020-07-19 21:48:30,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=4405, Invalid=12107, Unknown=0, NotChecked=0, Total=16512 [2020-07-19 21:48:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-19 21:48:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-07-19 21:48:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-19 21:48:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-07-19 21:48:30,449 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2020-07-19 21:48:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:30,450 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-07-19 21:48:30,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-19 21:48:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-07-19 21:48:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 21:48:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:30,452 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:30,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-07-19 21:48:30,652 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash 544100342, now seen corresponding path program 40 times [2020-07-19 21:48:30,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:30,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051336455] [2020-07-19 21:48:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:48:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:35,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051336455] [2020-07-19 21:48:35,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275671197] [2020-07-19 21:48:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:48:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 21:48:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:40,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:40,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44] total 88 [2020-07-19 21:48:40,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287730681] [2020-07-19 21:48:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-19 21:48:40,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-19 21:48:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1814, Invalid=5842, Unknown=0, NotChecked=0, Total=7656 [2020-07-19 21:48:40,974 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 88 states. [2020-07-19 21:48:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:47,617 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-07-19 21:48:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 21:48:47,619 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 106 [2020-07-19 21:48:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:47,621 INFO L225 Difference]: With dead ends: 136 [2020-07-19 21:48:47,621 INFO L226 Difference]: Without dead ends: 114 [2020-07-19 21:48:47,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=4617, Invalid=12675, Unknown=0, NotChecked=0, Total=17292 [2020-07-19 21:48:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-19 21:48:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-07-19 21:48:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-19 21:48:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-07-19 21:48:47,626 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2020-07-19 21:48:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:47,626 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-07-19 21:48:47,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-19 21:48:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-07-19 21:48:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 21:48:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:47,627 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:47,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:47,827 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash -709436552, now seen corresponding path program 41 times [2020-07-19 21:48:47,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:47,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639648385] [2020-07-19 21:48:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:48:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:53,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639648385] [2020-07-19 21:48:53,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033876795] [2020-07-19 21:48:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:48:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-19 21:48:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:48:58,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:48:58,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45] total 90 [2020-07-19 21:48:58,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539396445] [2020-07-19 21:48:58,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-19 21:48:58,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-19 21:48:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=6110, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 21:48:58,896 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 90 states. [2020-07-19 21:49:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:05,407 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-07-19 21:49:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-19 21:49:05,408 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 108 [2020-07-19 21:49:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:05,409 INFO L225 Difference]: With dead ends: 138 [2020-07-19 21:49:05,409 INFO L226 Difference]: Without dead ends: 116 [2020-07-19 21:49:05,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=4834, Invalid=13256, Unknown=0, NotChecked=0, Total=18090 [2020-07-19 21:49:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-19 21:49:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-07-19 21:49:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-19 21:49:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-07-19 21:49:05,415 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2020-07-19 21:49:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:05,415 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-07-19 21:49:05,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-19 21:49:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-07-19 21:49:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-19 21:49:05,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:05,416 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:05,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:49:05,617 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1527418490, now seen corresponding path program 42 times [2020-07-19 21:49:05,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:05,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836420764] [2020-07-19 21:49:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:49:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:10,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836420764] [2020-07-19 21:49:10,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534780242] [2020-07-19 21:49:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:49:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:11,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 21:49:11,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:16,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:49:16,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46] total 92 [2020-07-19 21:49:16,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853726065] [2020-07-19 21:49:16,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-19 21:49:16,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-19 21:49:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1988, Invalid=6384, Unknown=0, NotChecked=0, Total=8372 [2020-07-19 21:49:16,681 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 92 states. [2020-07-19 21:49:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:24,722 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-07-19 21:49:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 21:49:24,724 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 110 [2020-07-19 21:49:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:24,726 INFO L225 Difference]: With dead ends: 140 [2020-07-19 21:49:24,726 INFO L226 Difference]: Without dead ends: 118 [2020-07-19 21:49:24,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=5056, Invalid=13850, Unknown=0, NotChecked=0, Total=18906 [2020-07-19 21:49:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-19 21:49:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-07-19 21:49:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-19 21:49:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-07-19 21:49:24,732 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2020-07-19 21:49:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:24,732 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-07-19 21:49:24,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-19 21:49:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-07-19 21:49:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-19 21:49:24,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:24,734 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:24,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-19 21:49:24,947 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -633501444, now seen corresponding path program 43 times [2020-07-19 21:49:24,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:24,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716938702] [2020-07-19 21:49:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:49:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:31,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716938702] [2020-07-19 21:49:31,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973471970] [2020-07-19 21:49:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:49:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-19 21:49:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:38,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:49:38,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47] total 94 [2020-07-19 21:49:38,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483250238] [2020-07-19 21:49:38,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-19 21:49:38,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-19 21:49:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=6664, Unknown=0, NotChecked=0, Total=8742 [2020-07-19 21:49:38,677 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 94 states. [2020-07-19 21:49:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:47,705 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-07-19 21:49:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-19 21:49:47,707 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 112 [2020-07-19 21:49:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:47,709 INFO L225 Difference]: With dead ends: 142 [2020-07-19 21:49:47,709 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 21:49:47,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3146 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=5283, Invalid=14457, Unknown=0, NotChecked=0, Total=19740 [2020-07-19 21:49:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 21:49:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-07-19 21:49:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-19 21:49:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-07-19 21:49:47,715 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2020-07-19 21:49:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:47,716 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-07-19 21:49:47,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-19 21:49:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-07-19 21:49:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-19 21:49:47,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:47,717 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:47,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-07-19 21:49:47,930 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1486613246, now seen corresponding path program 44 times [2020-07-19 21:49:47,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:47,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164212302] [2020-07-19 21:49:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:49:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:49:55,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164212302] [2020-07-19 21:49:55,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136363010] [2020-07-19 21:49:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:49:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 21:49:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:03,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:50:03,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48] total 96 [2020-07-19 21:50:03,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454533344] [2020-07-19 21:50:03,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-19 21:50:03,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-19 21:50:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=6950, Unknown=0, NotChecked=0, Total=9120 [2020-07-19 21:50:03,156 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 96 states. [2020-07-19 21:50:03,768 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:50:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:13,050 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-07-19 21:50:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-19 21:50:13,052 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 114 [2020-07-19 21:50:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:13,053 INFO L225 Difference]: With dead ends: 144 [2020-07-19 21:50:13,053 INFO L226 Difference]: Without dead ends: 122 [2020-07-19 21:50:13,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3285 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=5515, Invalid=15077, Unknown=0, NotChecked=0, Total=20592 [2020-07-19 21:50:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-19 21:50:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-07-19 21:50:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-19 21:50:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-07-19 21:50:13,060 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2020-07-19 21:50:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:13,060 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-07-19 21:50:13,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-19 21:50:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-07-19 21:50:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-19 21:50:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:13,061 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:13,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-07-19 21:50:13,273 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1192635264, now seen corresponding path program 45 times [2020-07-19 21:50:13,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:13,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679570439] [2020-07-19 21:50:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:50:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:21,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679570439] [2020-07-19 21:50:21,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662423750] [2020-07-19 21:50:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:50:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:21,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-19 21:50:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:29,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:50:29,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49] total 98 [2020-07-19 21:50:29,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926581858] [2020-07-19 21:50:29,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-07-19 21:50:29,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-07-19 21:50:29,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2264, Invalid=7242, Unknown=0, NotChecked=0, Total=9506 [2020-07-19 21:50:29,289 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 98 states. [2020-07-19 21:50:29,955 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:50:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:40,105 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-07-19 21:50:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-19 21:50:40,107 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 116 [2020-07-19 21:50:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:40,108 INFO L225 Difference]: With dead ends: 146 [2020-07-19 21:50:40,109 INFO L226 Difference]: Without dead ends: 124 [2020-07-19 21:50:40,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=5752, Invalid=15710, Unknown=0, NotChecked=0, Total=21462 [2020-07-19 21:50:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-19 21:50:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-07-19 21:50:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-19 21:50:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-07-19 21:50:40,115 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2020-07-19 21:50:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:40,116 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-07-19 21:50:40,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-07-19 21:50:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-07-19 21:50:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-19 21:50:40,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:40,117 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:40,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:50:40,331 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1029924226, now seen corresponding path program 46 times [2020-07-19 21:50:40,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:40,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665638115] [2020-07-19 21:50:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:50:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:49,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665638115] [2020-07-19 21:50:49,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844201489] [2020-07-19 21:50:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:50:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:50:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-19 21:50:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:50:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:50:58,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:50:58,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50] total 100 [2020-07-19 21:50:58,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165686572] [2020-07-19 21:50:58,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-07-19 21:50:58,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-07-19 21:50:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2360, Invalid=7540, Unknown=0, NotChecked=0, Total=9900 [2020-07-19 21:50:58,009 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 100 states. [2020-07-19 21:50:58,505 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:51:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:09,135 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-07-19 21:51:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-19 21:51:09,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 118 [2020-07-19 21:51:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:09,139 INFO L225 Difference]: With dead ends: 148 [2020-07-19 21:51:09,139 INFO L226 Difference]: Without dead ends: 126 [2020-07-19 21:51:09,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=5994, Invalid=16356, Unknown=0, NotChecked=0, Total=22350 [2020-07-19 21:51:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-19 21:51:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-07-19 21:51:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-19 21:51:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-07-19 21:51:09,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2020-07-19 21:51:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:09,145 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-07-19 21:51:09,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-07-19 21:51:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-07-19 21:51:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-19 21:51:09,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:09,147 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:09,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-07-19 21:51:09,360 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1984119292, now seen corresponding path program 47 times [2020-07-19 21:51:09,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:09,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878265454] [2020-07-19 21:51:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:51:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878265454] [2020-07-19 21:51:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182441910] [2020-07-19 21:51:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:51:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-19 21:51:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:51:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:29,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:51:29,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51] total 102 [2020-07-19 21:51:29,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767073836] [2020-07-19 21:51:29,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-19 21:51:29,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:51:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-19 21:51:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2458, Invalid=7844, Unknown=0, NotChecked=0, Total=10302 [2020-07-19 21:51:29,102 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 102 states. [2020-07-19 21:51:29,864 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:51:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:41,390 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2020-07-19 21:51:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-19 21:51:41,393 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 120 [2020-07-19 21:51:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:41,395 INFO L225 Difference]: With dead ends: 150 [2020-07-19 21:51:41,395 INFO L226 Difference]: Without dead ends: 128 [2020-07-19 21:51:41,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=6241, Invalid=17015, Unknown=0, NotChecked=0, Total=23256 [2020-07-19 21:51:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-19 21:51:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-07-19 21:51:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-19 21:51:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-07-19 21:51:41,402 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2020-07-19 21:51:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:41,402 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-07-19 21:51:41,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-19 21:51:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-07-19 21:51:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 21:51:41,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:41,403 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:41,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:51:41,604 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:41,605 INFO L82 PathProgramCache]: Analyzing trace with hash 622984710, now seen corresponding path program 48 times [2020-07-19 21:51:41,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:41,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640137941] [2020-07-19 21:51:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:51:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:51:51,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640137941] [2020-07-19 21:51:51,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324564480] [2020-07-19 21:51:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:51:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:51:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-19 21:51:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:52:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:02,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:52:02,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52] total 104 [2020-07-19 21:52:02,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037090132] [2020-07-19 21:52:02,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-19 21:52:02,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:52:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-19 21:52:02,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=8154, Unknown=0, NotChecked=0, Total=10712 [2020-07-19 21:52:02,047 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 104 states. [2020-07-19 21:52:02,925 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:52:14,591 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:52:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:52:15,560 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-07-19 21:52:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-19 21:52:15,563 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 122 [2020-07-19 21:52:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:52:15,564 INFO L225 Difference]: With dead ends: 152 [2020-07-19 21:52:15,565 INFO L226 Difference]: Without dead ends: 130 [2020-07-19 21:52:15,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=6493, Invalid=17687, Unknown=0, NotChecked=0, Total=24180 [2020-07-19 21:52:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-19 21:52:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-07-19 21:52:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-19 21:52:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-07-19 21:52:15,571 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2020-07-19 21:52:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:52:15,572 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-07-19 21:52:15,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-19 21:52:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-07-19 21:52:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-19 21:52:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:52:15,573 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:52:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:52:15,784 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:52:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:52:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2083997064, now seen corresponding path program 49 times [2020-07-19 21:52:15,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:52:15,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202574792] [2020-07-19 21:52:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:52:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:26,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202574792] [2020-07-19 21:52:26,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121397576] [2020-07-19 21:52:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:52:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 53 conjunts are in the unsatisfiable core [2020-07-19 21:52:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:52:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:52:38,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:52:38,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53] total 106 [2020-07-19 21:52:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658345259] [2020-07-19 21:52:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-07-19 21:52:38,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:52:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-07-19 21:52:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2660, Invalid=8470, Unknown=0, NotChecked=0, Total=11130 [2020-07-19 21:52:38,025 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 106 states. [2020-07-19 21:52:38,784 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:52:51,376 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:52:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:52:52,232 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-07-19 21:52:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-19 21:52:52,235 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 124 [2020-07-19 21:52:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:52:52,236 INFO L225 Difference]: With dead ends: 154 [2020-07-19 21:52:52,236 INFO L226 Difference]: Without dead ends: 132 [2020-07-19 21:52:52,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4025 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=6750, Invalid=18372, Unknown=0, NotChecked=0, Total=25122 [2020-07-19 21:52:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-19 21:52:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-07-19 21:52:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-19 21:52:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-07-19 21:52:52,242 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2020-07-19 21:52:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:52:52,242 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-07-19 21:52:52,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-07-19 21:52:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-07-19 21:52:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-19 21:52:52,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:52:52,243 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:52:52,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-07-19 21:52:52,444 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:52:52,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:52:52,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1662563466, now seen corresponding path program 50 times [2020-07-19 21:52:52,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:52:52,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678534122] [2020-07-19 21:52:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:52:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:52:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2505 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:04,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678534122] [2020-07-19 21:53:04,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802061210] [2020-07-19 21:53:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:53:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 54 conjunts are in the unsatisfiable core [2020-07-19 21:53:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2505 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:16,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:53:16,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54] total 108 [2020-07-19 21:53:16,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556677807] [2020-07-19 21:53:16,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-19 21:53:16,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:53:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-19 21:53:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2764, Invalid=8792, Unknown=0, NotChecked=0, Total=11556 [2020-07-19 21:53:16,455 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 108 states. [2020-07-19 21:53:17,371 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:53:31,222 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:53:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:53:32,261 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-07-19 21:53:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-19 21:53:32,265 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 126 [2020-07-19 21:53:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:53:32,265 INFO L225 Difference]: With dead ends: 156 [2020-07-19 21:53:32,265 INFO L226 Difference]: Without dead ends: 134 [2020-07-19 21:53:32,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4182 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=7012, Invalid=19070, Unknown=0, NotChecked=0, Total=26082 [2020-07-19 21:53:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-19 21:53:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-07-19 21:53:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-19 21:53:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-07-19 21:53:32,272 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2020-07-19 21:53:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:53:32,272 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-07-19 21:53:32,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-07-19 21:53:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-07-19 21:53:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-19 21:53:32,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:53:32,274 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:53:32,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:53:32,486 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:53:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:53:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash 391801612, now seen corresponding path program 51 times [2020-07-19 21:53:32,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:53:32,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791787824] [2020-07-19 21:53:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:53:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:40,707 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:41,751 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:53:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:46,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791787824] [2020-07-19 21:53:46,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402303642] [2020-07-19 21:53:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 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 [2020-07-19 21:53:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:53:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-19 21:53:46,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:53:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:53:58,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:53:58,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55] total 110 [2020-07-19 21:53:58,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415708355] [2020-07-19 21:53:58,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-19 21:53:58,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:53:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-19 21:53:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2870, Invalid=9120, Unknown=0, NotChecked=0, Total=11990 [2020-07-19 21:53:58,936 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 110 states. [2020-07-19 21:54:00,072 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:54:15,351 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:54:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:54:16,608 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2020-07-19 21:54:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-19 21:54:16,612 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 128 [2020-07-19 21:54:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:54:16,613 INFO L225 Difference]: With dead ends: 158 [2020-07-19 21:54:16,613 INFO L226 Difference]: Without dead ends: 136 [2020-07-19 21:54:16,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=7279, Invalid=19781, Unknown=0, NotChecked=0, Total=27060 [2020-07-19 21:54:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-19 21:54:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-07-19 21:54:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-19 21:54:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-07-19 21:54:16,619 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2020-07-19 21:54:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:54:16,619 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-07-19 21:54:16,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-19 21:54:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-07-19 21:54:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-19 21:54:16,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:54:16,620 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:54:16,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-07-19 21:54:16,821 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:54:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:54:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1039628018, now seen corresponding path program 52 times [2020-07-19 21:54:16,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:54:16,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602499949] [2020-07-19 21:54:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:54:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:20,942 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:27,579 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:27,983 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:28,403 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:54:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:54:31,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602499949] [2020-07-19 21:54:31,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99486090] [2020-07-19 21:54:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:54:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:54:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-19 21:54:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:54:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:54:46,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:54:46,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56] total 112 [2020-07-19 21:54:46,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827427456] [2020-07-19 21:54:46,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-07-19 21:54:46,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:54:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-07-19 21:54:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2978, Invalid=9454, Unknown=0, NotChecked=0, Total=12432 [2020-07-19 21:54:46,365 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 112 states. [2020-07-19 21:54:47,401 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:55:02,893 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:04,188 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:55:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:55:05,345 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2020-07-19 21:55:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-19 21:55:05,349 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 130 [2020-07-19 21:55:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:55:05,350 INFO L225 Difference]: With dead ends: 160 [2020-07-19 21:55:05,350 INFO L226 Difference]: Without dead ends: 138 [2020-07-19 21:55:05,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4505 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=7551, Invalid=20505, Unknown=0, NotChecked=0, Total=28056 [2020-07-19 21:55:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-19 21:55:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-07-19 21:55:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-19 21:55:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-07-19 21:55:05,356 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2020-07-19 21:55:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:55:05,356 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-07-19 21:55:05,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-07-19 21:55:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-07-19 21:55:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-19 21:55:05,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:55:05,357 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:55:05,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-07-19 21:55:05,558 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:55:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:55:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2040999568, now seen corresponding path program 53 times [2020-07-19 21:55:05,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:55:05,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81350202] [2020-07-19 21:55:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:55:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:05,893 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,021 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,170 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,321 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,633 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,799 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:06,975 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,153 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,340 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,546 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,748 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:07,967 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,180 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,399 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,623 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:08,863 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,103 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,348 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:09,840 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,106 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,390 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,674 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:10,972 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,283 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,594 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:11,920 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:12,247 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:12,564 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,216 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,551 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:13,893 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,251 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,616 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:14,980 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:15,347 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:15,725 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:16,111 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:16,510 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:16,908 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:17,302 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:17,712 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:18,133 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:18,568 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:19,003 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:19,461 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:19,909 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:20,367 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:20,813 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:21,266 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:21,735 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:22,220 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:55:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:55:22,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81350202] [2020-07-19 21:55:22,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883310702] [2020-07-19 21:55:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:55:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-19 21:55:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:55:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:55:38,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:55:38,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57] total 114 [2020-07-19 21:55:38,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021504894] [2020-07-19 21:55:38,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-19 21:55:38,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:55:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-19 21:55:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=9794, Unknown=0, NotChecked=0, Total=12882 [2020-07-19 21:55:38,339 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 114 states. [2020-07-19 21:55:39,673 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:55:41,356 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:55:58,199 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:55:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:55:59,679 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2020-07-19 21:55:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-19 21:55:59,683 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 132 [2020-07-19 21:55:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:55:59,684 INFO L225 Difference]: With dead ends: 162 [2020-07-19 21:55:59,685 INFO L226 Difference]: Without dead ends: 140 [2020-07-19 21:55:59,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4671 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=7828, Invalid=21242, Unknown=0, NotChecked=0, Total=29070 [2020-07-19 21:55:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-19 21:55:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-07-19 21:55:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-19 21:55:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-07-19 21:55:59,690 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2020-07-19 21:55:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:55:59,691 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-07-19 21:55:59,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-19 21:55:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-07-19 21:55:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 21:55:59,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:55:59,692 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:55:59,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:55:59,897 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:55:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:55:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1003324526, now seen corresponding path program 54 times [2020-07-19 21:55:59,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:55:59,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440980534] [2020-07-19 21:55:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:55:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:55:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:00,193 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:00,328 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:00,474 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:00,632 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:00,794 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:00,960 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:01,136 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:01,331 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:01,520 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:01,713 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:01,922 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:02,136 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:02,353 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:02,571 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:02,804 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:03,045 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:03,290 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:03,537 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:03,803 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:04,065 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:04,341 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:04,624 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:04,909 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:05,204 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:05,507 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:05,813 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,129 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,453 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:06,779 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,111 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,450 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:07,790 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,140 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,499 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:08,871 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,251 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:09,638 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,044 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,443 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:10,849 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:11,261 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:11,686 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:12,145 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:12,605 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:13,088 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:13,567 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:14,066 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:14,542 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,022 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,495 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:15,971 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:16,471 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:16,980 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:17,556 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:18,079 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2921 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:56:18,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440980534] [2020-07-19 21:56:18,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816807989] [2020-07-19 21:56:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:56:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 58 conjunts are in the unsatisfiable core [2020-07-19 21:56:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:56:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2921 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:56:35,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:56:35,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 58] total 116 [2020-07-19 21:56:35,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300373394] [2020-07-19 21:56:35,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-07-19 21:56:35,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:56:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-07-19 21:56:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3200, Invalid=10140, Unknown=0, NotChecked=0, Total=13340 [2020-07-19 21:56:35,590 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 116 states. [2020-07-19 21:56:36,890 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:56:41,089 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:43,692 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:44,448 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:45,237 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:45,656 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:46,091 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:46,956 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:56:56,720 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:56:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:56:58,104 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-19 21:56:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-19 21:56:58,109 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 134 [2020-07-19 21:56:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:56:58,110 INFO L225 Difference]: With dead ends: 164 [2020-07-19 21:56:58,110 INFO L226 Difference]: Without dead ends: 142 [2020-07-19 21:56:58,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4840 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=8110, Invalid=21992, Unknown=0, NotChecked=0, Total=30102 [2020-07-19 21:56:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-19 21:56:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-07-19 21:56:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-19 21:56:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-07-19 21:56:58,115 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2020-07-19 21:56:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:56:58,116 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-07-19 21:56:58,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-07-19 21:56:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-07-19 21:56:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 21:56:58,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:56:58,117 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:56:58,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-07-19 21:56:58,317 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:56:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:56:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1726050284, now seen corresponding path program 55 times [2020-07-19 21:56:58,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:56:58,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182664182] [2020-07-19 21:56:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:56:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:56:58,641 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:58,785 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:58,934 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:59,088 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:59,249 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:59,421 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:59,600 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:56:59,801 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:00,007 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:00,222 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:00,443 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:00,673 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:00,915 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:01,159 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:01,411 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:01,670 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:01,946 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:02,208 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:02,476 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:02,781 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:03,066 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:03,349 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:03,639 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:03,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:04,257 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:04,588 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:04,914 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:05,248 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:05,591 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:05,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:06,298 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:06,662 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:07,050 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:07,428 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:07,810 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:08,201 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:08,597 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:09,000 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:09,413 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:09,835 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:10,280 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:10,748 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,209 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:11,663 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,122 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:12,604 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,089 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:13,588 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,066 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:14,591 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:15,124 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:15,669 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:16,223 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:16,760 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:17,326 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:17,851 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:57:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3030 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:57:18,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182664182] [2020-07-19 21:57:18,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057193562] [2020-07-19 21:57:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:57:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:57:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 59 conjunts are in the unsatisfiable core [2020-07-19 21:57:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:57:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3030 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:57:36,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:57:36,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59] total 118 [2020-07-19 21:57:36,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253985203] [2020-07-19 21:57:36,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-19 21:57:36,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:57:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-19 21:57:36,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3314, Invalid=10492, Unknown=0, NotChecked=0, Total=13806 [2020-07-19 21:57:36,354 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 118 states. [2020-07-19 21:57:37,610 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-19 21:57:38,394 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:38,579 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:38,775 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:38,978 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:39,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:39,405 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:40,334 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:41,676 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:41,973 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:42,925 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:43,279 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:43,650 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:44,031 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:44,423 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:44,810 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:45,196 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:45,605 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:46,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:47,228 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:47,661 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:48,102 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:48,548 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:49,003 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:49,461 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:49,935 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:50,879 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:53,940 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:54,486 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:55,036 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:55,595 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:56,172 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:57,340 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,555 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-07-19 21:57:58,868 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-19 21:58:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:58:00,294 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-07-19 21:58:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-19 21:58:00,299 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 136 [2020-07-19 21:58:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:58:00,300 INFO L225 Difference]: With dead ends: 166 [2020-07-19 21:58:00,300 INFO L226 Difference]: Without dead ends: 144 [2020-07-19 21:58:00,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5012 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=8397, Invalid=22755, Unknown=0, NotChecked=0, Total=31152 [2020-07-19 21:58:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-19 21:58:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-07-19 21:58:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-19 21:58:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-07-19 21:58:00,306 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 136 [2020-07-19 21:58:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:58:00,306 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-07-19 21:58:00,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-19 21:58:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-07-19 21:58:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-19 21:58:00,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:58:00,307 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:58:00,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:58:00,508 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:58:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:58:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash -480801770, now seen corresponding path program 56 times [2020-07-19 21:58:00,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:58:00,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632464652] [2020-07-19 21:58:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@253e67a5 [2020-07-19 21:58:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:58:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:58:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:58:00,861 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,014 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,174 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,342 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,513 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,692 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:01,884 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:02,087 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:02,296 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:02,513 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:02,733 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:02,959 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:03,192 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:03,431 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:03,679 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:03,938 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:04,201 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:04,477 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-07-19 21:58:04,764 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12