/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:35:05,779 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 14:35:05,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:35:05,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:35:05,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:35:05,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:35:05,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:35:05,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:35:05,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:35:05,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:35:05,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:35:05,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:35:05,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:35:05,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:35:05,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:35:05,859 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 [2020-07-20 14:35:05,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:35:05,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:35:05,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:35:05,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:35:05,881 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:35:05,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:35:05,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:35:05,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:35:05,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:35:05,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:35:05,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:35:05,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:35:05,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:35:05,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:35:05,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:35:05,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:35:05,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:35:05,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:35:05,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:35:05,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:35:05,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:35:05,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:35:05,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:35:05,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:35:05,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:35:05,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:35:05,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:05,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:35:05,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:35:05,886 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 -> 4 [2020-07-20 14:35:06,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:35:06,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:35:06,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:35:06,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:35:06,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:35:06,263 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-20 14:35:06,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22fa17c1/13a4a3b40f414dcb9031534be4bab6fb/FLAG65e49da1a [2020-07-20 14:35:06,985 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:35:06,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-20 14:35:07,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22fa17c1/13a4a3b40f414dcb9031534be4bab6fb/FLAG65e49da1a [2020-07-20 14:35:07,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a22fa17c1/13a4a3b40f414dcb9031534be4bab6fb [2020-07-20 14:35:07,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:35:07,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:35:07,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:35:07,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:35:07,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:35:07,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518c2b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07, skipping insertion in model container [2020-07-20 14:35:07,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:35:07,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:35:07,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:35:07,743 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:35:07,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:35:07,785 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:35:07,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07 WrapperNode [2020-07-20 14:35:07,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:35:07,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:35:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:35:07,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:35:07,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (1/1) ... [2020-07-20 14:35:07,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:35:07,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:35:07,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:35:07,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:35:07,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (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 [2020-07-20 14:35:08,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:35:08,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:35:08,014 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:35:08,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:35:08,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:35:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:35:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:35:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:35:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:35:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:35:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:35:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:35:08,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:35:08,279 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:35:08,279 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:35:08,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:35:08 BoogieIcfgContainer [2020-07-20 14:35:08,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:35:08,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:35:08,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:35:08,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:35:08,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:35:07" (1/3) ... [2020-07-20 14:35:08,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ea9b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:35:08, skipping insertion in model container [2020-07-20 14:35:08,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:07" (2/3) ... [2020-07-20 14:35:08,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ea9b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:35:08, skipping insertion in model container [2020-07-20 14:35:08,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:35:08" (3/3) ... [2020-07-20 14:35:08,299 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-07-20 14:35:08,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:35:08,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:35:08,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:35:08,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:35:08,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:35:08,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:35:08,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:35:08,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:35:08,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:35:08,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:35:08,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:35:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 14:35:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:35:08,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:08,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:08,412 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-07-20 14:35:08,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:08,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359628319] [2020-07-20 14:35:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:08,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:08,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:08,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:35:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:08,790 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:35:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:08,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:35:08,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359628319] [2020-07-20 14:35:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:35:08,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:35:08,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601757662] [2020-07-20 14:35:08,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:35:08,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:08,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:35:08,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:35:08,881 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-07-20 14:35:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:09,124 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-20 14:35:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:35:09,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-20 14:35:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:09,140 INFO L225 Difference]: With dead ends: 46 [2020-07-20 14:35:09,140 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:35:09,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:35:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:35:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:35:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:35:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 14:35:09,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 14:35:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:09,209 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 14:35:09,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:35:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 14:35:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 14:35:09,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:09,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:09,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:09,427 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-07-20 14:35:09,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:09,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278126625] [2020-07-20 14:35:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:09,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:35:09,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 14:35:09,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:09,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:09,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:09,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278126625] [2020-07-20 14:35:09,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:09,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-20 14:35:09,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024962239] [2020-07-20 14:35:09,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 14:35:09,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 14:35:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 14:35:09,797 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-07-20 14:35:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:10,133 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 14:35:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 14:35:10,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-07-20 14:35:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:10,135 INFO L225 Difference]: With dead ends: 25 [2020-07-20 14:35:10,135 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 14:35:10,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:35:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 14:35:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 14:35:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 14:35:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 14:35:10,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-20 14:35:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:10,145 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 14:35:10,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 14:35:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 14:35:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:35:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:10,147 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:10,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:10,362 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1744767088, now seen corresponding path program 2 times [2020-07-20 14:35:10,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:10,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151497979] [2020-07-20 14:35:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:10,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:10,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 14:35:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:10,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:10,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151497979] [2020-07-20 14:35:10,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:10,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 14:35:10,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726388545] [2020-07-20 14:35:10,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 14:35:10,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 14:35:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:35:10,911 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2020-07-20 14:35:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:11,676 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 14:35:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 14:35:11,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-07-20 14:35:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:11,678 INFO L225 Difference]: With dead ends: 31 [2020-07-20 14:35:11,678 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 14:35:11,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-07-20 14:35:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 14:35:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 14:35:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 14:35:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 14:35:11,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-20 14:35:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:11,690 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 14:35:11,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 14:35:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 14:35:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:35:11,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:11,692 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:11,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:11,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1040440016, now seen corresponding path program 3 times [2020-07-20 14:35:11,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:11,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699176082] [2020-07-20 14:35:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:11,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:11,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 14:35:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:12,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:12,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:12,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699176082] [2020-07-20 14:35:12,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:12,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-20 14:35:12,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479162116] [2020-07-20 14:35:12,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 14:35:12,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 14:35:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-07-20 14:35:12,898 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 29 states. [2020-07-20 14:35:13,564 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-20 14:35:13,852 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-07-20 14:35:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:14,889 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-07-20 14:35:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 14:35:14,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 22 [2020-07-20 14:35:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:14,891 INFO L225 Difference]: With dead ends: 43 [2020-07-20 14:35:14,891 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:35:14,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 14:35:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:35:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 14:35:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 14:35:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-20 14:35:14,906 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-20 14:35:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:14,906 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-20 14:35:14,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 14:35:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-20 14:35:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 14:35:14,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:14,908 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:15,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:15,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash -276146064, now seen corresponding path program 4 times [2020-07-20 14:35:15,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:15,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135790487] [2020-07-20 14:35:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:15,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:15,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 14:35:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:16,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:16,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:17,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135790487] [2020-07-20 14:35:17,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:17,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-20 14:35:17,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132852178] [2020-07-20 14:35:17,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 14:35:17,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 14:35:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=2119, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 14:35:17,733 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 53 states. [2020-07-20 14:35:18,819 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 14:35:19,267 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-20 14:35:19,634 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:35:20,005 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-07-20 14:35:20,359 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:35:20,799 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 14:35:21,134 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 14:35:21,490 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 14:35:21,801 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 14:35:22,109 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 14:35:22,414 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 14:35:22,707 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 14:35:25,558 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:35:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:25,580 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-20 14:35:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-20 14:35:25,581 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 34 [2020-07-20 14:35:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:25,583 INFO L225 Difference]: With dead ends: 67 [2020-07-20 14:35:25,583 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 14:35:25,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1952, Invalid=4528, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 14:35:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 14:35:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 14:35:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 14:35:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-20 14:35:25,620 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-20 14:35:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:25,621 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-20 14:35:25,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 14:35:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-20 14:35:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 14:35:25,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:25,635 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:25,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:25,850 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:25,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2111955216, now seen corresponding path program 5 times [2020-07-20 14:35:25,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:25,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448992435] [2020-07-20 14:35:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:35:25,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:25,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-20 14:35:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:28,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:28,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:35,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448992435] [2020-07-20 14:35:35,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:35,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-20 14:35:35,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772791452] [2020-07-20 14:35:35,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-20 14:35:35,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-20 14:35:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2413, Invalid=7687, Unknown=0, NotChecked=0, Total=10100 [2020-07-20 14:35:35,592 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 101 states. [2020-07-20 14:35:39,204 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 14:35:40,385 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-20 14:35:41,817 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 14:35:42,801 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 193 [2020-07-20 14:35:44,220 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 14:35:45,863 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-20 14:35:47,270 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-20 14:35:48,623 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 14:35:49,953 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-20 14:35:51,315 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 14:35:52,642 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 14:35:53,936 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 14:35:55,181 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-20 14:35:56,417 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 14:35:57,614 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-20 14:35:58,615 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 14:35:59,722 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 14:36:00,750 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-20 14:36:01,902 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-20 14:36:03,046 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-20 14:36:04,016 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-20 14:36:05,064 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-20 14:36:06,141 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 14:36:07,167 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-20 14:36:08,160 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 14:36:09,146 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-20 14:36:10,095 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 14:36:11,033 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 14:36:11,927 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:36:12,794 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 14:36:13,659 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 14:36:14,493 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 14:36:15,283 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 14:36:16,041 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 14:36:16,791 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 14:36:17,474 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 14:36:18,525 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 14:36:25,322 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 14:36:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:36:25,348 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-07-20 14:36:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-20 14:36:25,350 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 58 [2020-07-20 14:36:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:36:25,352 INFO L225 Difference]: With dead ends: 115 [2020-07-20 14:36:25,352 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 14:36:25,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=7328, Invalid=15928, Unknown=0, NotChecked=0, Total=23256 [2020-07-20 14:36:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 14:36:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 14:36:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 14:36:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-20 14:36:25,395 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-20 14:36:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:36:25,400 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-20 14:36:25,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-20 14:36:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-20 14:36:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 14:36:25,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:36:25,416 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:36:25,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:36:25,630 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:36:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:36:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash -236770320, now seen corresponding path program 6 times [2020-07-20 14:36:25,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:36:25,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917523389] [2020-07-20 14:36:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 14:36:25,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:36:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:36:25,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-20 14:36:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:36:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:36:39,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:36:39,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:37:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:37:26,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917523389] [2020-07-20 14:37:26,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:37:26,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-20 14:37:26,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444303675] [2020-07-20 14:37:26,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-20 14:37:26,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:37:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-20 14:37:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9421, Invalid=29191, Unknown=0, NotChecked=0, Total=38612 [2020-07-20 14:37:26,034 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 197 states. [2020-07-20 14:38:05,172 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-20 14:38:11,519 WARN L193 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-20 14:38:31,687 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-20 14:38:37,816 WARN L193 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 479 DAG size of output: 385 [2020-07-20 14:38:56,446 WARN L193 SmtUtils]: Spent 3.49 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-20 14:39:17,119 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-20 14:39:40,414 WARN L193 SmtUtils]: Spent 3.94 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-20 14:40:06,010 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-20 14:40:31,620 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-20 14:40:59,271 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-20 14:41:24,519 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-20 14:41:53,320 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-20 14:42:19,679 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-20 14:42:50,681 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 14:43:21,307 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-20 14:43:51,866 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-20 14:44:18,993 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-20 14:44:37,810 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-20 14:44:56,924 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 14:45:16,761 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 14:45:36,789 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 14:45:57,000 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-20 14:46:17,035 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 14:46:37,660 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-20 14:46:58,380 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 14:47:19,234 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-20 14:47:40,325 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-20 14:48:01,603 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-20 14:48:23,266 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-20 14:48:45,129 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-20 14:49:07,026 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-20 14:49:28,896 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 337