/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.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_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 23:36:33,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:36:33,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:36:33,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:36:33,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:36:33,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:36:33,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:36:33,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:36:33,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:36:33,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:36:33,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:36:33,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:36:33,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:36:33,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:36:33,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:36:33,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:36:33,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:36:33,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:36:33,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:36:33,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:36:33,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:36:33,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:36:33,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:36:33,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:36:33,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:36:33,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:36:33,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:36:33,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:36:33,642 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 23:36:33,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:36:33,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:36:33,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:36:33,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:36:33,675 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:36:33,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:36:33,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:36:33,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:36:33,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:36:33,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:36:33,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:36:33,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:36:33,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:36:33,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:36:33,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:36:33,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:36:33,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:36:33,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:36:33,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:36:33,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:36:33,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:36:33,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:36:33,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:36:33,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:36:33,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:36:33,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:36:33,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:36:33,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:36:33,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:36:33,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:36:34,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:36:34,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:36:34,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:36:34,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:36:34,144 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:36:34,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-19 23:36:34,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab478fcc5/f3466b6b63894a7a864e7b45fe81c81d/FLAG126128f33 [2020-07-19 23:36:34,774 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:36:34,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-19 23:36:34,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab478fcc5/f3466b6b63894a7a864e7b45fe81c81d/FLAG126128f33 [2020-07-19 23:36:35,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab478fcc5/f3466b6b63894a7a864e7b45fe81c81d [2020-07-19 23:36:35,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:36:35,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:36:35,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:36:35,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:36:35,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:36:35,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a71685b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35, skipping insertion in model container [2020-07-19 23:36:35,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:36:35,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:36:35,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:36:35,387 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:36:35,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:36:35,417 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:36:35,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35 WrapperNode [2020-07-19 23:36:35,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:36:35,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:36:35,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:36:35,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:36:35,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (1/1) ... [2020-07-19 23:36:35,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:36:35,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:36:35,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:36:35,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:36:35,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (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 23:36:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:36:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:36:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:36:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-19 23:36:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:36:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:36:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:36:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 23:36:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-07-19 23:36:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 23:36:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 23:36:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 23:36:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:36:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:36:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 23:36:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:36:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:36:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:36:35,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:36:35,893 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 23:36:35,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:36:35 BoogieIcfgContainer [2020-07-19 23:36:35,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:36:35,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:36:35,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:36:35,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:36:35,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:36:35" (1/3) ... [2020-07-19 23:36:35,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0029f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:36:35, skipping insertion in model container [2020-07-19 23:36:35,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:36:35" (2/3) ... [2020-07-19 23:36:35,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0029f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:36:35, skipping insertion in model container [2020-07-19 23:36:35,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:36:35" (3/3) ... [2020-07-19 23:36:35,912 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-07-19 23:36:35,933 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:36:35,942 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:36:35,962 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:36:35,996 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:36:35,996 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:36:35,996 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:36:35,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:36:35,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:36:35,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:36:35,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:36:35,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:36:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 23:36:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:36:36,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:36,032 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 23:36:36,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-07-19 23:36:36,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:36,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754720605] [2020-07-19 23:36:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,345 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 23:36:36,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754720605] [2020-07-19 23:36:36,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:36:36,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:36:36,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615947955] [2020-07-19 23:36:36,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:36:36,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:36:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:36:36,376 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-19 23:36:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:36,570 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-07-19 23:36:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:36:36,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-19 23:36:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:36,585 INFO L225 Difference]: With dead ends: 59 [2020-07-19 23:36:36,585 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 23:36:36,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:36:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 23:36:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-07-19 23:36:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 23:36:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-19 23:36:36,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-07-19 23:36:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:36,638 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-19 23:36:36,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:36:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-19 23:36:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:36:36,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:36,640 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 23:36:36,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:36:36,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-07-19 23:36:36,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:36,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24043335] [2020-07-19 23:36:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:36,835 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 23:36:36,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24043335] [2020-07-19 23:36:36,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:36:36,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:36:36,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626294961] [2020-07-19 23:36:36,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:36:36,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:36:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:36:36,840 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-19 23:36:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:37,076 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 23:36:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:36:37,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 23:36:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:37,079 INFO L225 Difference]: With dead ends: 48 [2020-07-19 23:36:37,079 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:36:37,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:36:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:36:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 23:36:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:36:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-19 23:36:37,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-07-19 23:36:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:37,092 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-19 23:36:37,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:36:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-19 23:36:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:36:37,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:37,094 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 23:36:37,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:36:37,094 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-07-19 23:36:37,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:37,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780460995] [2020-07-19 23:36:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:37,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780460995] [2020-07-19 23:36:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529430813] [2020-07-19 23:36:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cb820bf 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 23:36:37,445 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cb820bf issued 2 check-sat command(s) [2020-07-19 23:36:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:36:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:37,543 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 23:36:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:37,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-19 23:36:37,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420659942] [2020-07-19 23:36:37,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:36:37,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:36:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:36:37,546 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-07-19 23:36:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:37,961 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-19 23:36:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:36:37,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-19 23:36:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:37,962 INFO L225 Difference]: With dead ends: 50 [2020-07-19 23:36:37,963 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:36:37,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:36:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:36:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-19 23:36:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:36:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-19 23:36:37,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-19 23:36:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:37,987 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-19 23:36:37,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:36:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-19 23:36:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:36:37,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:37,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:38,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:36:38,194 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-07-19 23:36:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:38,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347248750] [2020-07-19 23:36:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:38,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347248750] [2020-07-19 23:36:38,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227827192] [2020-07-19 23:36:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71bd5218 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:38,662 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71bd5218 issued 2 check-sat command(s) [2020-07-19 23:36:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:36:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:38,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:38,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-19 23:36:38,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297332977] [2020-07-19 23:36:38,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:36:38,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:36:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:36:38,769 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-07-19 23:36:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:39,190 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-19 23:36:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:36:39,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-07-19 23:36:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:39,192 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:36:39,192 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:36:39,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 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 23:36:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:36:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-19 23:36:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:36:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 23:36:39,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-07-19 23:36:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:39,200 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 23:36:39,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:36:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 23:36:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:36:39,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:39,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:39,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:39,411 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-07-19 23:36:39,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:39,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293447264] [2020-07-19 23:36:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:39,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293447264] [2020-07-19 23:36:39,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340938040] [2020-07-19 23:36:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5965fee1 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 23:36:39,683 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5965fee1 issued 2 check-sat command(s) [2020-07-19 23:36:39,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:36:39,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:39,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:39,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-07-19 23:36:39,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108204903] [2020-07-19 23:36:39,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:36:39,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:36:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:36:39,781 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-07-19 23:36:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:40,238 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-07-19 23:36:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:36:40,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-07-19 23:36:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:40,240 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:36:40,240 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:36:40,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 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 23:36:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:36:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-19 23:36:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:36:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-19 23:36:40,257 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-19 23:36:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:40,258 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-19 23:36:40,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:36:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-19 23:36:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:36:40,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:40,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:40,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:40,479 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-07-19 23:36:40,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:40,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898479862] [2020-07-19 23:36:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:40,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898479862] [2020-07-19 23:36:40,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287629404] [2020-07-19 23:36:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68c5ccc0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:40,854 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@68c5ccc0 issued 3 check-sat command(s) [2020-07-19 23:36:40,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:36:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:40,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:40,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-07-19 23:36:40,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121209463] [2020-07-19 23:36:40,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:36:40,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:40,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:36:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:36:40,978 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-07-19 23:36:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:41,425 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-19 23:36:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:36:41,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-07-19 23:36:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:41,428 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:36:41,428 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 23:36:41,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 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 23:36:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 23:36:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-19 23:36:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 23:36:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-19 23:36:41,444 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-07-19 23:36:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:41,444 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-19 23:36:41,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:36:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-19 23:36:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:36:41,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:41,449 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:41,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:41,650 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-07-19 23:36:41,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:41,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289789223] [2020-07-19 23:36:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:41,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289789223] [2020-07-19 23:36:41,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87771506] [2020-07-19 23:36:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7473052d 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 23:36:42,056 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7473052d issued 3 check-sat command(s) [2020-07-19 23:36:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:36:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:42,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:42,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-07-19 23:36:42,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651235068] [2020-07-19 23:36:42,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:36:42,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:42,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:36:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:36:42,194 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-07-19 23:36:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:42,739 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-19 23:36:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:36:42,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-07-19 23:36:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:42,741 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:36:42,742 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 23:36:42,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 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 23:36:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 23:36:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-19 23:36:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:36:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-19 23:36:42,750 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-07-19 23:36:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:42,751 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-19 23:36:42,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:36:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-19 23:36:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 23:36:42,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:42,752 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:42,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:36:42,956 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-07-19 23:36:42,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:42,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038524379] [2020-07-19 23:36:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:43,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038524379] [2020-07-19 23:36:43,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136999593] [2020-07-19 23:36:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a1387 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:43,646 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a1387 issued 3 check-sat command(s) [2020-07-19 23:36:43,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:36:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:43,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-07-19 23:36:43,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115180980] [2020-07-19 23:36:43,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:36:43,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:36:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:36:43,849 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-07-19 23:36:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:44,398 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-19 23:36:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:36:44,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-07-19 23:36:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:44,400 INFO L225 Difference]: With dead ends: 60 [2020-07-19 23:36:44,401 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:36:44,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 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 23:36:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:36:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 23:36:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 23:36:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-19 23:36:44,409 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-07-19 23:36:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:44,410 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-19 23:36:44,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:36:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-19 23:36:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:36:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:44,411 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:44,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:44,622 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-07-19 23:36:44,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:44,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943218409] [2020-07-19 23:36:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:45,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943218409] [2020-07-19 23:36:45,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970535526] [2020-07-19 23:36:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c312387 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 23:36:45,149 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c312387 issued 3 check-sat command(s) [2020-07-19 23:36:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:36:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:45,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:45,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-19 23:36:45,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864504835] [2020-07-19 23:36:45,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:36:45,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:36:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:36:45,357 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2020-07-19 23:36:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:45,941 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-19 23:36:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:36:45,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-07-19 23:36:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:45,942 INFO L225 Difference]: With dead ends: 62 [2020-07-19 23:36:45,943 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 23:36:45,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 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 23:36:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 23:36:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-19 23:36:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 23:36:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-07-19 23:36:45,950 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-07-19 23:36:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:45,950 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-07-19 23:36:45,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:36:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-07-19 23:36:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 23:36:45,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:45,952 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:46,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:46,158 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-07-19 23:36:46,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:46,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031934126] [2020-07-19 23:36:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:46,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031934126] [2020-07-19 23:36:46,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961574587] [2020-07-19 23:36:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16e9d4fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:47,136 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16e9d4fe issued 3 check-sat command(s) [2020-07-19 23:36:47,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:36:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:36:47,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:47,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-07-19 23:36:47,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829906604] [2020-07-19 23:36:47,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:36:47,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:36:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:36:47,410 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 24 states. [2020-07-19 23:36:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:48,042 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-19 23:36:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:36:48,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-07-19 23:36:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:48,044 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:36:48,044 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 23:36:48,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 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 23:36:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 23:36:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-19 23:36:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:36:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-19 23:36:48,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-19 23:36:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:48,052 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-19 23:36:48,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:36:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-19 23:36:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 23:36:48,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:48,053 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:36:48,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:36:48,267 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-07-19 23:36:48,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:48,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807025378] [2020-07-19 23:36:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-19 23:36:48,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807025378] [2020-07-19 23:36:48,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:36:48,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:36:48,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801419222] [2020-07-19 23:36:48,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:36:48,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:36:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:36:48,357 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-07-19 23:36:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:48,450 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-07-19 23:36:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:36:48,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-19 23:36:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:48,455 INFO L225 Difference]: With dead ends: 65 [2020-07-19 23:36:48,456 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 23:36:48,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:36:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 23:36:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-07-19 23:36:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:36:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-19 23:36:48,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-07-19 23:36:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:48,481 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-19 23:36:48,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:36:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-19 23:36:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 23:36:48,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:48,483 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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 23:36:48,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 23:36:48,484 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-07-19 23:36:48,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:48,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216167932] [2020-07-19 23:36:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-19 23:36:48,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216167932] [2020-07-19 23:36:48,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102059653] [2020-07-19 23:36:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37963a8c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:48,798 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37963a8c issued 2 check-sat command(s) [2020-07-19 23:36:48,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:48,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 23:36:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-19 23:36:48,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:36:48,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-19 23:36:48,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53596062] [2020-07-19 23:36:48,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:36:48,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:48,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:36:48,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:36:48,818 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-07-19 23:36:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:48,826 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-19 23:36:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:36:48,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-19 23:36:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:48,828 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:36:48,828 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 23:36:48,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 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 23:36:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 23:36:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-19 23:36:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:36:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-19 23:36:48,835 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 41 [2020-07-19 23:36:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:48,835 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-19 23:36:48,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:36:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-19 23:36:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 23:36:48,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:48,836 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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 23:36:49,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:49,050 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1446948051, now seen corresponding path program 1 times [2020-07-19 23:36:49,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:49,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364210392] [2020-07-19 23:36:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-19 23:36:49,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364210392] [2020-07-19 23:36:49,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424772436] [2020-07-19 23:36:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@423aeb67 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 23:36:49,663 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@423aeb67 issued 3 check-sat command(s) [2020-07-19 23:36:49,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:36:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:36:49,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:49,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-07-19 23:36:49,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051535744] [2020-07-19 23:36:49,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:36:49,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:49,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:36:49,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:36:49,891 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 17 states. [2020-07-19 23:36:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:50,161 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-07-19 23:36:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:36:50,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-07-19 23:36:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:50,163 INFO L225 Difference]: With dead ends: 83 [2020-07-19 23:36:50,163 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 23:36:50,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:36:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 23:36:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-07-19 23:36:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:36:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-07-19 23:36:50,171 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2020-07-19 23:36:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:50,171 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-07-19 23:36:50,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:36:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-07-19 23:36:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 23:36:50,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:50,173 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 23:36:50,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:50,380 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-07-19 23:36:50,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:50,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914249497] [2020-07-19 23:36:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:50,930 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 23:36:50,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914249497] [2020-07-19 23:36:50,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976403437] [2020-07-19 23:36:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3474bd1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:51,393 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3474bd1e issued 3 check-sat command(s) [2020-07-19 23:36:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:36:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:51,740 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 23:36:51,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:51,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-07-19 23:36:51,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293678640] [2020-07-19 23:36:51,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:36:51,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:36:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:36:51,743 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 28 states. [2020-07-19 23:36:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:52,573 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-19 23:36:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:36:52,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-07-19 23:36:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:52,575 INFO L225 Difference]: With dead ends: 76 [2020-07-19 23:36:52,576 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:36:52,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:36:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:36:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-19 23:36:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 23:36:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-07-19 23:36:52,583 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-07-19 23:36:52,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:52,584 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-07-19 23:36:52,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:36:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-07-19 23:36:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 23:36:52,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:52,585 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 23:36:52,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:36:52,800 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-07-19 23:36:52,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:52,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488881889] [2020-07-19 23:36:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:36:53,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488881889] [2020-07-19 23:36:53,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788210314] [2020-07-19 23:36:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@582bc336 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 23:36:54,502 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@582bc336 issued 3 check-sat command(s) [2020-07-19 23:36:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 23:36:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:54,875 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 23:36:54,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:54,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2020-07-19 23:36:54,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965302924] [2020-07-19 23:36:54,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:36:54,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:36:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:36:54,878 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 30 states. [2020-07-19 23:36:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:55,818 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-07-19 23:36:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:36:55,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-07-19 23:36:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:55,819 INFO L225 Difference]: With dead ends: 78 [2020-07-19 23:36:55,819 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 23:36:55,821 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 23:36:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 23:36:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 23:36:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 23:36:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-19 23:36:55,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-07-19 23:36:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:55,839 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-19 23:36:55,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:36:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-19 23:36:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 23:36:55,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:55,844 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 23:36:56,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 23:36:56,057 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-07-19 23:36:56,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:56,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112303775] [2020-07-19 23:36:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:56,643 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 23:36:56,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112303775] [2020-07-19 23:36:56,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77333184] [2020-07-19 23:36:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36201779 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:36:57,171 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36201779 issued 3 check-sat command(s) [2020-07-19 23:36:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:36:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:36:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:36:57,616 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 23:36:57,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:36:57,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-07-19 23:36:57,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099865186] [2020-07-19 23:36:57,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 23:36:57,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:36:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 23:36:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:36:57,619 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 32 states. [2020-07-19 23:36:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:36:58,578 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-07-19 23:36:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:36:58,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-07-19 23:36:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:36:58,580 INFO L225 Difference]: With dead ends: 80 [2020-07-19 23:36:58,581 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 23:36:58,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 23:36:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 23:36:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 23:36:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:36:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-19 23:36:58,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-07-19 23:36:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:36:58,589 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-19 23:36:58,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 23:36:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-19 23:36:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 23:36:58,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:36:58,590 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 23:36:58,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:36:58,801 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:36:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:36:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-07-19 23:36:58,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:36:58,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694677130] [2020-07-19 23:36:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:36:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:36:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:36:59,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694677130] [2020-07-19 23:36:59,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684142110] [2020-07-19 23:36:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a0edb4f 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 23:37:00,607 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a0edb4f issued 3 check-sat command(s) [2020-07-19 23:37:00,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 23:37:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:01,081 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 23:37:01,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:01,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-07-19 23:37:01,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833560215] [2020-07-19 23:37:01,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 23:37:01,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 23:37:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:37:01,083 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 34 states. [2020-07-19 23:37:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:02,081 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-07-19 23:37:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:37:02,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-07-19 23:37:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:02,083 INFO L225 Difference]: With dead ends: 82 [2020-07-19 23:37:02,083 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:37:02,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=648, Invalid=1902, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 23:37:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:37:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-19 23:37:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 23:37:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-19 23:37:02,092 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-07-19 23:37:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:02,092 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-19 23:37:02,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 23:37:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-19 23:37:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 23:37:02,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:02,094 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 23:37:02,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:02,309 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-07-19 23:37:02,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:02,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992911275] [2020-07-19 23:37:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:03,015 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 23:37:03,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992911275] [2020-07-19 23:37:03,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833353784] [2020-07-19 23:37:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1102d775 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:04,704 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1102d775 issued 3 check-sat command(s) [2020-07-19 23:37:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:37:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:05,243 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 23:37:05,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:05,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2020-07-19 23:37:05,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612957390] [2020-07-19 23:37:05,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 23:37:05,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 23:37:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:37:05,246 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 36 states. [2020-07-19 23:37:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:06,403 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-07-19 23:37:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:37:06,404 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-07-19 23:37:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:06,405 INFO L225 Difference]: With dead ends: 84 [2020-07-19 23:37:06,405 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 23:37:06,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 23:37:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 23:37:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-19 23:37:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 23:37:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-07-19 23:37:06,412 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-07-19 23:37:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:06,413 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-07-19 23:37:06,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 23:37:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-07-19 23:37:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 23:37:06,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:06,414 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 23:37:06,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:37:06,622 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-07-19 23:37:06,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:06,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178117585] [2020-07-19 23:37:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:37:07,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178117585] [2020-07-19 23:37:07,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788462922] [2020-07-19 23:37:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b39cbad 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 23:37:10,335 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b39cbad issued 3 check-sat command(s) [2020-07-19 23:37:10,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:37:10,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:10,982 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 23:37:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:10,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2020-07-19 23:37:10,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435178612] [2020-07-19 23:37:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 23:37:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 23:37:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:37:10,984 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 38 states. [2020-07-19 23:37:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:12,227 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-07-19 23:37:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:37:12,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-07-19 23:37:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:12,228 INFO L225 Difference]: With dead ends: 86 [2020-07-19 23:37:12,229 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 23:37:12,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-07-19 23:37:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 23:37:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-07-19 23:37:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 23:37:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-07-19 23:37:12,236 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-07-19 23:37:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:12,236 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-07-19 23:37:12,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 23:37:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-07-19 23:37:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 23:37:12,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:12,237 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 23:37:12,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:12,449 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-07-19 23:37:12,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:12,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116858586] [2020-07-19 23:37:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:13,464 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 23:37:13,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116858586] [2020-07-19 23:37:13,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988470849] [2020-07-19 23:37:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2749937 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:17,219 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2749937 issued 3 check-sat command(s) [2020-07-19 23:37:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:37:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:17,915 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 23:37:17,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:17,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2020-07-19 23:37:17,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576658568] [2020-07-19 23:37:17,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 23:37:17,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:17,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 23:37:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:37:17,918 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-07-19 23:37:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:19,171 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-07-19 23:37:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:37:19,172 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-19 23:37:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:19,173 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:37:19,173 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:37:19,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=909, Invalid=2631, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 23:37:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:37:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-19 23:37:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 23:37:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-07-19 23:37:19,181 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-07-19 23:37:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:19,181 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-07-19 23:37:19,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 23:37:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-07-19 23:37:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-19 23:37:19,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:19,183 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 23:37:19,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:19,398 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-07-19 23:37:19,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:19,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462734368] [2020-07-19 23:37:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:37:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462734368] [2020-07-19 23:37:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580718597] [2020-07-19 23:37:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e6c9219 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 23:37:24,234 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e6c9219 issued 3 check-sat command(s) [2020-07-19 23:37:24,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 23:37:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:24,973 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 23:37:24,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:24,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2020-07-19 23:37:24,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110563524] [2020-07-19 23:37:24,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 23:37:24,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 23:37:24,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:37:24,984 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 42 states. [2020-07-19 23:37:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:26,282 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-19 23:37:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:37:26,282 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-07-19 23:37:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:26,284 INFO L225 Difference]: With dead ends: 90 [2020-07-19 23:37:26,284 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 23:37:26,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-07-19 23:37:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 23:37:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-19 23:37:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 23:37:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-07-19 23:37:26,300 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-07-19 23:37:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:26,300 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-07-19 23:37:26,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 23:37:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-07-19 23:37:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 23:37:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:26,301 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 23:37:26,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 23:37:26,502 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-07-19 23:37:26,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:26,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632743329] [2020-07-19 23:37:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:27,536 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 23:37:27,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632743329] [2020-07-19 23:37:27,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30356576] [2020-07-19 23:37:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9c2eac2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:34,968 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9c2eac2 issued 3 check-sat command(s) [2020-07-19 23:37:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:37:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:35,791 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 23:37:35,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:35,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2020-07-19 23:37:35,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797214230] [2020-07-19 23:37:35,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 23:37:35,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 23:37:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:37:35,793 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 44 states. [2020-07-19 23:37:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:37,303 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-07-19 23:37:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:37:37,306 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 62 [2020-07-19 23:37:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:37,307 INFO L225 Difference]: With dead ends: 92 [2020-07-19 23:37:37,307 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 23:37:37,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1108, Invalid=3182, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 23:37:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 23:37:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-19 23:37:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 23:37:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-07-19 23:37:37,313 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-07-19 23:37:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-07-19 23:37:37,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 23:37:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-07-19 23:37:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 23:37:37,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:37,314 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 23:37:37,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:37,518 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-07-19 23:37:37,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:37,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090902243] [2020-07-19 23:37:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:37:38,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090902243] [2020-07-19 23:37:38,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861088234] [2020-07-19 23:37:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7737aaf 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 23:37:45,265 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7737aaf issued 4 check-sat command(s) [2020-07-19 23:37:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 23:37:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:46,211 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 23:37:46,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:46,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-07-19 23:37:46,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120381610] [2020-07-19 23:37:46,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 23:37:46,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 23:37:46,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:37:46,214 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 46 states. [2020-07-19 23:37:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:47,684 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-07-19 23:37:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:37:47,685 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2020-07-19 23:37:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:47,686 INFO L225 Difference]: With dead ends: 94 [2020-07-19 23:37:47,686 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 23:37:47,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2020-07-19 23:37:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 23:37:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-19 23:37:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 23:37:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-07-19 23:37:47,694 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-07-19 23:37:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:47,694 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-07-19 23:37:47,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 23:37:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-07-19 23:37:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 23:37:47,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:47,695 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 23:37:47,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 23:37:47,899 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-07-19 23:37:47,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:47,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552024060] [2020-07-19 23:37:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:49,143 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 23:37:49,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552024060] [2020-07-19 23:37:49,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257523365] [2020-07-19 23:37:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e8d9d65 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:37:55,848 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e8d9d65 issued 3 check-sat command(s) [2020-07-19 23:37:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:37:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:37:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:37:56,837 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 23:37:56,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:37:56,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-07-19 23:37:56,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801278804] [2020-07-19 23:37:56,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-19 23:37:56,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:37:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-19 23:37:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1742, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 23:37:56,840 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 48 states. [2020-07-19 23:37:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:37:58,544 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-07-19 23:37:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:37:58,545 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-07-19 23:37:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:37:58,546 INFO L225 Difference]: With dead ends: 96 [2020-07-19 23:37:58,546 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 23:37:58,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1327, Invalid=3785, Unknown=0, NotChecked=0, Total=5112 [2020-07-19 23:37:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 23:37:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-07-19 23:37:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-19 23:37:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-07-19 23:37:58,554 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-07-19 23:37:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:37:58,554 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-07-19 23:37:58,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-19 23:37:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-07-19 23:37:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 23:37:58,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:37:58,555 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 23:37:58,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 23:37:58,759 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:37:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:37:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-07-19 23:37:58,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:37:58,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562281100] [2020-07-19 23:37:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:37:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:37:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:38:00,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562281100] [2020-07-19 23:38:00,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999188869] [2020-07-19 23:38:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e30de4e 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 23:38:11,023 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e30de4e issued 4 check-sat command(s) [2020-07-19 23:38:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 23:38:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:12,144 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 23:38:12,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:12,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 50 [2020-07-19 23:38:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731110234] [2020-07-19 23:38:12,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-19 23:38:12,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-19 23:38:12,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1890, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 23:38:12,147 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 50 states. [2020-07-19 23:38:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:13,847 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-07-19 23:38:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:38:13,848 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 68 [2020-07-19 23:38:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:13,849 INFO L225 Difference]: With dead ends: 98 [2020-07-19 23:38:13,850 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 23:38:13,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1444, Invalid=4106, Unknown=0, NotChecked=0, Total=5550 [2020-07-19 23:38:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 23:38:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-07-19 23:38:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 23:38:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-07-19 23:38:13,856 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-07-19 23:38:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:13,857 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-07-19 23:38:13,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-19 23:38:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-07-19 23:38:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-19 23:38:13,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:13,857 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 23:38:14,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:14,070 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-07-19 23:38:14,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:14,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523843789] [2020-07-19 23:38:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:38:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:15,443 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 23:38:15,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523843789] [2020-07-19 23:38:15,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884715611] [2020-07-19 23:38:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56be0fc5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:31,616 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56be0fc5 issued 4 check-sat command(s) [2020-07-19 23:38:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:38:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:32,962 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 23:38:32,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:32,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2020-07-19 23:38:32,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253938831] [2020-07-19 23:38:32,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-19 23:38:32,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-19 23:38:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 23:38:32,965 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 52 states. [2020-07-19 23:38:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:35,002 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-07-19 23:38:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:38:35,003 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 70 [2020-07-19 23:38:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:35,004 INFO L225 Difference]: With dead ends: 100 [2020-07-19 23:38:35,005 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 23:38:35,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1566, Invalid=4440, Unknown=0, NotChecked=0, Total=6006 [2020-07-19 23:38:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 23:38:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-19 23:38:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 23:38:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-07-19 23:38:35,010 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-07-19 23:38:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:35,010 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-07-19 23:38:35,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-19 23:38:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-07-19 23:38:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-19 23:38:35,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:35,011 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 23:38:35,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 23:38:35,219 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-07-19 23:38:35,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:35,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893127461] [2020-07-19 23:38:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:38:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:38:36,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893127461] [2020-07-19 23:38:36,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471518324] [2020-07-19 23:38:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@139795d8 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 23:38:49,646 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@139795d8 issued 4 check-sat command(s) [2020-07-19 23:38:49,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:38:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 23:38:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:38:51,006 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 23:38:51,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:38:51,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2020-07-19 23:38:51,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034096430] [2020-07-19 23:38:51,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-19 23:38:51,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:38:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-19 23:38:51,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2020-07-19 23:38:51,008 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 54 states. [2020-07-19 23:38:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:38:53,110 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-07-19 23:38:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:38:53,111 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-07-19 23:38:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:38:53,112 INFO L225 Difference]: With dead ends: 102 [2020-07-19 23:38:53,113 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 23:38:53,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1693, Invalid=4787, Unknown=0, NotChecked=0, Total=6480 [2020-07-19 23:38:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 23:38:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-07-19 23:38:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-19 23:38:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-07-19 23:38:53,120 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-07-19 23:38:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:38:53,120 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-07-19 23:38:53,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-19 23:38:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-07-19 23:38:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-19 23:38:53,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:38:53,121 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 23:38:53,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:38:53,322 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:38:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:38:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-07-19 23:38:53,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:38:53,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394042255] [2020-07-19 23:38:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:38:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:38:55,002 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 23:38:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394042255] [2020-07-19 23:38:55,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538578089] [2020-07-19 23:38:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45d9f89 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:23,608 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45d9f89 issued 4 check-sat command(s) [2020-07-19 23:39:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:39:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:25,321 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 23:39:25,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:25,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 56 [2020-07-19 23:39:25,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418794971] [2020-07-19 23:39:25,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-19 23:39:25,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-19 23:39:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=2370, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 23:39:25,323 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 56 states. [2020-07-19 23:39:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:27,503 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-07-19 23:39:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:39:27,504 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2020-07-19 23:39:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:27,505 INFO L225 Difference]: With dead ends: 104 [2020-07-19 23:39:27,505 INFO L226 Difference]: Without dead ends: 82 [2020-07-19 23:39:27,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1825, Invalid=5147, Unknown=0, NotChecked=0, Total=6972 [2020-07-19 23:39:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-19 23:39:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-07-19 23:39:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 23:39:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-07-19 23:39:27,511 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-07-19 23:39:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-07-19 23:39:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-19 23:39:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-07-19 23:39:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-19 23:39:27,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:27,512 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 23:39:27,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 23:39:27,720 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-07-19 23:39:27,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:27,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148255007] [2020-07-19 23:39:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:39:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:39:29,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148255007] [2020-07-19 23:39:29,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254891591] [2020-07-19 23:39:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48c0342a 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 23:39:41,538 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48c0342a issued 4 check-sat command(s) [2020-07-19 23:39:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 23:39:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:43,076 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 23:39:43,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:43,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2020-07-19 23:39:43,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149758665] [2020-07-19 23:39:43,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-19 23:39:43,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-19 23:39:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=2542, Unknown=0, NotChecked=0, Total=3306 [2020-07-19 23:39:43,078 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 58 states. [2020-07-19 23:39:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:45,392 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-07-19 23:39:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:39:45,392 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-07-19 23:39:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:45,393 INFO L225 Difference]: With dead ends: 106 [2020-07-19 23:39:45,393 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 23:39:45,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1962, Invalid=5520, Unknown=0, NotChecked=0, Total=7482 [2020-07-19 23:39:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 23:39:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-19 23:39:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 23:39:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-07-19 23:39:45,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-07-19 23:39:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:45,400 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-07-19 23:39:45,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-19 23:39:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-07-19 23:39:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-19 23:39:45,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:45,401 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 23:39:45,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 23:39:45,610 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-07-19 23:39:45,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:45,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688372281] [2020-07-19 23:39:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:39:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:47,341 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 23:39:47,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688372281] [2020-07-19 23:39:47,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120528336] [2020-07-19 23:39:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fddbb29 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:40:05,702 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fddbb29 issued 4 check-sat command(s) [2020-07-19 23:40:05,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:40:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:40:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:40:07,510 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 23:40:07,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:40:07,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 60 [2020-07-19 23:40:07,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587297898] [2020-07-19 23:40:07,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-19 23:40:07,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-19 23:40:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2720, Unknown=0, NotChecked=0, Total=3540 [2020-07-19 23:40:07,516 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 60 states. [2020-07-19 23:40:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:10,410 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-07-19 23:40:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 23:40:10,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-07-19 23:40:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:10,412 INFO L225 Difference]: With dead ends: 108 [2020-07-19 23:40:10,412 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 23:40:10,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2104, Invalid=5906, Unknown=0, NotChecked=0, Total=8010 [2020-07-19 23:40:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 23:40:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-19 23:40:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 23:40:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-07-19 23:40:10,418 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-07-19 23:40:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:10,418 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-07-19 23:40:10,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-19 23:40:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-07-19 23:40:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 23:40:10,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:10,419 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 23:40:10,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:40:10,629 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-07-19 23:40:10,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:10,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828221313] [2020-07-19 23:40:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:40:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:40:12,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828221313] [2020-07-19 23:40:12,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461409263] [2020-07-19 23:40:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b0a7758 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 23:42:09,676 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b0a7758 issued 4 check-sat command(s) [2020-07-19 23:42:09,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 23:42:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:15,369 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 23:42:15,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:15,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 62 [2020-07-19 23:42:15,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831642713] [2020-07-19 23:42:15,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-19 23:42:15,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-19 23:42:15,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=2904, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 23:42:15,371 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 62 states. [2020-07-19 23:42:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:18,039 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-07-19 23:42:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 23:42:18,040 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-07-19 23:42:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:18,041 INFO L225 Difference]: With dead ends: 110 [2020-07-19 23:42:18,041 INFO L226 Difference]: Without dead ends: 88 [2020-07-19 23:42:18,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2251, Invalid=6305, Unknown=0, NotChecked=0, Total=8556 [2020-07-19 23:42:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-19 23:42:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-07-19 23:42:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 23:42:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-07-19 23:42:18,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-07-19 23:42:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:18,047 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-07-19 23:42:18,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-19 23:42:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-07-19 23:42:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 23:42:18,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:18,048 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 23:42:18,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:18,250 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-07-19 23:42:18,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:18,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836515717] [2020-07-19 23:42:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:42:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:20,239 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 23:42:20,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836515717] [2020-07-19 23:42:20,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039450821] [2020-07-19 23:42:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@422272d5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:09,778 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@422272d5 issued 4 check-sat command(s) [2020-07-19 23:43:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:43:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:12,754 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 23:43:12,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:12,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2020-07-19 23:43:12,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100860409] [2020-07-19 23:43:12,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-19 23:43:12,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-19 23:43:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=3094, Unknown=0, NotChecked=0, Total=4032 [2020-07-19 23:43:12,756 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 64 states. [2020-07-19 23:43:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:15,556 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-07-19 23:43:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 23:43:15,557 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 82 [2020-07-19 23:43:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:15,558 INFO L225 Difference]: With dead ends: 112 [2020-07-19 23:43:15,559 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 23:43:15,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2403, Invalid=6717, Unknown=0, NotChecked=0, Total=9120 [2020-07-19 23:43:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 23:43:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-07-19 23:43:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 23:43:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-07-19 23:43:15,564 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-07-19 23:43:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:15,565 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-07-19 23:43:15,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-19 23:43:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-07-19 23:43:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-19 23:43:15,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:15,566 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 23:43:15,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-19 23:43:15,771 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-07-19 23:43:15,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:15,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817161586] [2020-07-19 23:43:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:43:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:43:17,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817161586] [2020-07-19 23:43:17,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895918356] [2020-07-19 23:43:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26c5693b 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 23:44:15,490 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26c5693b issued 4 check-sat command(s) [2020-07-19 23:44:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:44:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 23:44:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:44:19,001 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 23:44:19,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:44:19,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2020-07-19 23:44:19,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309452246] [2020-07-19 23:44:19,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-19 23:44:19,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:44:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-19 23:44:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2020-07-19 23:44:19,004 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 66 states. [2020-07-19 23:44:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:44:21,993 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-07-19 23:44:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 23:44:21,994 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 84 [2020-07-19 23:44:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:44:21,995 INFO L225 Difference]: With dead ends: 114 [2020-07-19 23:44:21,995 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 23:44:21,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2560, Invalid=7142, Unknown=0, NotChecked=0, Total=9702 [2020-07-19 23:44:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 23:44:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-07-19 23:44:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 23:44:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-07-19 23:44:22,001 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-07-19 23:44:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:44:22,001 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-07-19 23:44:22,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-19 23:44:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-07-19 23:44:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-19 23:44:22,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:44:22,002 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 23:44:22,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:44:22,210 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:44:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:44:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-07-19 23:44:22,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:44:22,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356545033] [2020-07-19 23:44:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a7924b0 [2020-07-19 23:44:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:24,542 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 23:44:24,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356545033] [2020-07-19 23:44:24,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041859917] [2020-07-19 23:44:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@acab4c4 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