/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:17:00,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:17:00,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:17:00,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:17:00,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:17:00,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:17:00,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:17:00,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:17:00,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:17:00,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:17:00,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:17:00,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:17:00,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:17:00,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:17:00,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:17:00,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:17:00,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:17:00,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:17:00,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:17:00,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:17:00,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:17:00,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:17:00,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:17:00,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:17:00,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:17:00,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:17:00,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:17:00,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:17:00,655 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 [2020-07-21 14:17:00,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:17:00,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:17:00,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:17:00,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:17:00,686 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:17:00,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:17:00,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:17:00,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:17:00,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:17:00,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:17:00,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:17:00,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:17:00,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:17:00,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:17:00,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:17:00,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:17:00,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:17:00,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:17:00,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:17:00,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:17:00,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:17:00,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:17:00,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:17:00,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:17:00,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:17:00,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:17:00,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:00,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:17:00,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:17:00,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 -> 2 [2020-07-21 14:17:00,988 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:17:01,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:17:01,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:17:01,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:17:01,007 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:17:01,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 14:17:01,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f21f157/c1c8c7d4801f458d951d1b707550c90b/FLAG86b3e9052 [2020-07-21 14:17:01,558 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:17:01,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 14:17:01,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f21f157/c1c8c7d4801f458d951d1b707550c90b/FLAG86b3e9052 [2020-07-21 14:17:01,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f21f157/c1c8c7d4801f458d951d1b707550c90b [2020-07-21 14:17:01,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:17:01,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:17:01,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:01,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:17:01,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:17:01,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:01" (1/1) ... [2020-07-21 14:17:01,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d436f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:01, skipping insertion in model container [2020-07-21 14:17:01,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:01" (1/1) ... [2020-07-21 14:17:01,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:17:01,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:17:02,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:02,187 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:17:02,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:02,212 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:17:02,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02 WrapperNode [2020-07-21 14:17:02,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:02,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:17:02,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:17:02,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:17:02,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:17:02,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:17:02,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:17:02,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:17:02,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (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 [2020-07-21 14:17:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:17:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:17:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:17:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:17:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:17:02,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:17:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:17:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:17:02,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:17:02,617 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:17:02,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:02 BoogieIcfgContainer [2020-07-21 14:17:02,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:17:02,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:17:02,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:17:02,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:17:02,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:17:01" (1/3) ... [2020-07-21 14:17:02,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b54f85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:02, skipping insertion in model container [2020-07-21 14:17:02,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (2/3) ... [2020-07-21 14:17:02,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b54f85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:02, skipping insertion in model container [2020-07-21 14:17:02,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:02" (3/3) ... [2020-07-21 14:17:02,657 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006_variant.i [2020-07-21 14:17:02,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:17:02,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:17:02,707 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:17:02,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:17:02,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:17:02,737 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:17:02,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:17:02,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:17:02,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:17:02,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:17:02,738 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:17:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 14:17:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 14:17:02,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:02,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:02,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:02,773 INFO L82 PathProgramCache]: Analyzing trace with hash -362650722, now seen corresponding path program 1 times [2020-07-21 14:17:02,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:02,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990585268] [2020-07-21 14:17:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:02,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:02,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:17:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:03,022 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:17:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:17:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990585268] [2020-07-21 14:17:03,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:17:03,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 14:17:03,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572044752] [2020-07-21 14:17:03,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:17:03,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:17:03,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:17:03,080 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-07-21 14:17:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:03,261 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-21 14:17:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:17:03,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-07-21 14:17:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:03,273 INFO L225 Difference]: With dead ends: 47 [2020-07-21 14:17:03,273 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 14:17:03,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 14:17:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 14:17:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 14:17:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 14:17:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 14:17:03,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-21 14:17:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:03,323 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 14:17:03,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:17:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 14:17:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:17:03,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:03,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:03,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:03,539 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1126137131, now seen corresponding path program 1 times [2020-07-21 14:17:03,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:03,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930239924] [2020-07-21 14:17:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:03,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:03,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 14:17:03,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:03,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:17:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930239924] [2020-07-21 14:17:03,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:03,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 14:17:03,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433320796] [2020-07-21 14:17:03,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:17:03,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:17:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:17:03,832 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 14:17:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:04,072 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-07-21 14:17:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 14:17:04,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 14:17:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:04,073 INFO L225 Difference]: With dead ends: 26 [2020-07-21 14:17:04,073 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 14:17:04,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-07-21 14:17:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 14:17:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 14:17:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 14:17:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-21 14:17:04,081 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2020-07-21 14:17:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:04,081 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-21 14:17:04,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:17:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-21 14:17:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 14:17:04,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:04,082 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:04,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:04,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1467221666, now seen corresponding path program 2 times [2020-07-21 14:17:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:04,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798575107] [2020-07-21 14:17:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:04,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:04,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:04,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 14:17:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:04,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:04,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:17:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:04,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798575107] [2020-07-21 14:17:04,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:04,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-21 14:17:04,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681783424] [2020-07-21 14:17:04,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 14:17:04,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 14:17:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 14:17:04,668 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2020-07-21 14:17:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:05,234 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-07-21 14:17:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 14:17:05,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2020-07-21 14:17:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:05,236 INFO L225 Difference]: With dead ends: 32 [2020-07-21 14:17:05,236 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 14:17:05,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-07-21 14:17:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 14:17:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 14:17:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 14:17:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-07-21 14:17:05,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-07-21 14:17:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:05,244 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-07-21 14:17:05,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 14:17:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-07-21 14:17:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 14:17:05,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:05,246 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:05,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:05,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2094249470, now seen corresponding path program 3 times [2020-07-21 14:17:05,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:05,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70813606] [2020-07-21 14:17:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:05,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:05,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-21 14:17:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:05,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:05,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:17:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:06,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70813606] [2020-07-21 14:17:06,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:06,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 14:17:06,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444922340] [2020-07-21 14:17:06,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 14:17:06,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 14:17:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-07-21 14:17:06,347 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 30 states. [2020-07-21 14:17:06,901 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 14:17:07,170 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-07-21 14:17:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:08,117 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-07-21 14:17:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 14:17:08,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2020-07-21 14:17:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:08,119 INFO L225 Difference]: With dead ends: 44 [2020-07-21 14:17:08,119 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 14:17:08,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=566, Invalid=1504, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 14:17:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 14:17:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 14:17:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 14:17:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-07-21 14:17:08,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 23 [2020-07-21 14:17:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:08,131 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-07-21 14:17:08,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 14:17:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-07-21 14:17:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 14:17:08,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:08,132 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:08,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:08,348 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash -810203330, now seen corresponding path program 4 times [2020-07-21 14:17:08,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:08,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139523841] [2020-07-21 14:17:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:08,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:08,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 14:17:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:09,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:09,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:17:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:10,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139523841] [2020-07-21 14:17:10,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:10,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2020-07-21 14:17:10,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503118892] [2020-07-21 14:17:10,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-21 14:17:10,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-21 14:17:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2220, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 14:17:10,911 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 54 states. [2020-07-21 14:17:11,874 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 14:17:12,269 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 14:17:12,624 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 14:17:12,964 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-07-21 14:17:13,306 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 14:17:13,705 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 14:17:14,008 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 14:17:14,342 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 14:17:14,628 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 14:17:14,904 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 14:17:15,174 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 14:17:15,446 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 14:17:18,182 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 14:17:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:18,198 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2020-07-21 14:17:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 14:17:18,200 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 35 [2020-07-21 14:17:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:18,201 INFO L225 Difference]: With dead ends: 68 [2020-07-21 14:17:18,202 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 14:17:18,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1958, Invalid=4684, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 14:17:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 14:17:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 14:17:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 14:17:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-07-21 14:17:18,221 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 35 [2020-07-21 14:17:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:18,221 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-07-21 14:17:18,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-21 14:17:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-07-21 14:17:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 14:17:18,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:18,224 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:18,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:18,439 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 404277694, now seen corresponding path program 5 times [2020-07-21 14:17:18,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:18,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152595148] [2020-07-21 14:17:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:18,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:18,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 289 conjunts are in the unsatisfiable core [2020-07-21 14:17:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:21,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:21,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:17:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:27,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152595148] [2020-07-21 14:17:27,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:27,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 102 [2020-07-21 14:17:27,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862869754] [2020-07-21 14:17:27,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-21 14:17:27,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-21 14:17:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=7884, Unknown=0, NotChecked=0, Total=10302 [2020-07-21 14:17:27,496 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 102 states. [2020-07-21 14:17:31,112 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 14:17:32,209 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 14:17:33,616 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 14:17:34,579 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 195 [2020-07-21 14:17:35,974 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-07-21 14:17:37,471 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 14:17:38,817 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-07-21 14:17:40,128 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-07-21 14:17:41,433 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 14:17:42,694 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-07-21 14:17:43,937 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 14:17:45,143 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-07-21 14:17:46,356 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-07-21 14:17:47,519 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 14:17:48,674 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 14:17:49,794 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-07-21 14:17:50,898 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-07-21 14:17:51,982 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-07-21 14:17:53,031 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 14:17:54,083 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 14:17:55,094 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 14:17:56,092 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 14:17:57,061 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 14:17:57,985 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 14:17:58,911 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-21 14:17:59,829 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 14:18:00,691 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 14:18:01,535 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 14:18:02,350 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 14:18:03,142 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 14:18:03,916 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 14:18:04,688 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 14:18:05,392 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 14:18:06,115 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 14:18:06,787 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 14:18:07,429 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 14:18:08,054 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 14:18:08,712 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 14:18:09,287 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 14:18:15,268 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 14:18:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:18:15,293 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2020-07-21 14:18:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 14:18:15,295 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 59 [2020-07-21 14:18:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:18:15,297 INFO L225 Difference]: With dead ends: 116 [2020-07-21 14:18:15,297 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 14:18:15,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=7334, Invalid=16228, Unknown=0, NotChecked=0, Total=23562 [2020-07-21 14:18:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 14:18:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 14:18:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 14:18:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-07-21 14:18:15,339 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 59 [2020-07-21 14:18:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:18:15,339 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-07-21 14:18:15,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-21 14:18:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-07-21 14:18:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 14:18:15,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:18:15,344 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:18:15,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:18:15,545 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:18:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:18:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1109479102, now seen corresponding path program 6 times [2020-07-21 14:18:15,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:18:15,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146914027] [2020-07-21 14:18:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:18:15,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:18:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:18:15,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 577 conjunts are in the unsatisfiable core [2020-07-21 14:18:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:18:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:18:28,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:18:29,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:19:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:19:16,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146914027] [2020-07-21 14:19:16,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:19:16,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 198 [2020-07-21 14:19:16,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328759713] [2020-07-21 14:19:16,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2020-07-21 14:19:16,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:19:16,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2020-07-21 14:19:16,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9426, Invalid=29580, Unknown=0, NotChecked=0, Total=39006 [2020-07-21 14:19:16,744 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 198 states. [2020-07-21 14:19:56,710 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 484 [2020-07-21 14:20:02,437 WARN L193 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 14:20:22,861 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 479 [2020-07-21 14:20:28,554 WARN L193 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 481 DAG size of output: 387 [2020-07-21 14:20:50,553 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 474 [2020-07-21 14:21:15,473 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 469 [2020-07-21 14:21:40,656 WARN L193 SmtUtils]: Spent 4.61 s on a formula simplification that was a NOOP. DAG size: 464 [2020-07-21 14:22:06,422 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification that was a NOOP. DAG size: 459 [2020-07-21 14:22:33,306 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification that was a NOOP. DAG size: 454 [2020-07-21 14:23:01,365 WARN L193 SmtUtils]: Spent 5.02 s on a formula simplification that was a NOOP. DAG size: 449 [2020-07-21 14:23:30,577 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification that was a NOOP. DAG size: 444 [2020-07-21 14:24:00,947 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification that was a NOOP. DAG size: 439 [2020-07-21 14:24:31,430 WARN L193 SmtUtils]: Spent 4.98 s on a formula simplification that was a NOOP. DAG size: 434 [2020-07-21 14:25:03,208 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification that was a NOOP. DAG size: 429 [2020-07-21 14:25:35,949 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification that was a NOOP. DAG size: 424 [2020-07-21 14:26:09,143 WARN L193 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 419 [2020-07-21 14:26:43,031 WARN L193 SmtUtils]: Spent 5.50 s on a formula simplification that was a NOOP. DAG size: 414 [2020-07-21 14:27:16,544 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification that was a NOOP. DAG size: 409 [2020-07-21 14:27:48,105 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification that was a NOOP. DAG size: 404 [2020-07-21 14:28:13,839 WARN L193 SmtUtils]: Spent 4.57 s on a formula simplification that was a NOOP. DAG size: 399 [2020-07-21 14:28:40,882 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification that was a NOOP. DAG size: 394 [2020-07-21 14:29:07,987 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 389 [2020-07-21 14:29:35,321 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification that was a NOOP. DAG size: 384 [2020-07-21 14:30:03,008 WARN L193 SmtUtils]: Spent 4.75 s on a formula simplification that was a NOOP. DAG size: 379 [2020-07-21 14:30:31,197 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification that was a NOOP. DAG size: 374 [2020-07-21 14:30:58,890 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification that was a NOOP. DAG size: 369 [2020-07-21 14:31:26,904 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification that was a NOOP. DAG size: 364