/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:35:50,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:35:50,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:35:50,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 14:35:50,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:35:50,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:35:50,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:35:50,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:35:50,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:35:50,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:35:50,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:35:50,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:35:50,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:35:50,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:35:50,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:35:50,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:35:50,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:35:50,947 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 14:35:50,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:35:50,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:35:50,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:35:50,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:35:50,968 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:35:50,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:35:50,969 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:35:50,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:35:50,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:35:50,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:35:50,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:35:50,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:35:50,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:35:50,970 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:35:50,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:35:50,971 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:35:50,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:35:50,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:35:50,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:35:50,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:35:50,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:35:50,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:35:50,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:35:50,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:35:50,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:35:50,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:35:50,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:50,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:35:50,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:35:50,974 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 14:35:51,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:35:51,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:35:51,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:35:51,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:35:51,428 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:35:51,429 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-20 14:35:51,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3971ff4a1/362a69ef369f4ff09c135b50fb17de45/FLAG0cb6818c4 [2020-07-20 14:35:52,038 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:35:52,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-20 14:35:52,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3971ff4a1/362a69ef369f4ff09c135b50fb17de45/FLAG0cb6818c4 [2020-07-20 14:35:52,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3971ff4a1/362a69ef369f4ff09c135b50fb17de45 [2020-07-20 14:35:52,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:35:52,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:35:52,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:35:52,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:35:52,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:35:52,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7addd38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52, skipping insertion in model container [2020-07-20 14:35:52,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:35:52,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:35:52,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:35:52,627 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:35:52,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:35:52,666 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:35:52,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52 WrapperNode [2020-07-20 14:35:52,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:35:52,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:35:52,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:35:52,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:35:52,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (1/1) ... [2020-07-20 14:35:52,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:35:52,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:35:52,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:35:52,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:35:52,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (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 14:35:52,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:35:52,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:35:52,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:35:52,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:35:52,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:35:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:35:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:35:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:35:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:35:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:35:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:35:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:35:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:35:53,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:35:53,129 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:35:53,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:35:53 BoogieIcfgContainer [2020-07-20 14:35:53,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:35:53,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:35:53,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:35:53,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:35:53,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:35:52" (1/3) ... [2020-07-20 14:35:53,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6755b988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:35:53, skipping insertion in model container [2020-07-20 14:35:53,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:35:52" (2/3) ... [2020-07-20 14:35:53,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6755b988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:35:53, skipping insertion in model container [2020-07-20 14:35:53,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:35:53" (3/3) ... [2020-07-20 14:35:53,145 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-20 14:35:53,158 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:35:53,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:35:53,185 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:35:53,215 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:35:53,215 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:35:53,215 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:35:53,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:35:53,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:35:53,216 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:35:53,217 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:35:53,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:35:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 14:35:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:35:53,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:53,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:53,249 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-20 14:35:53,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:53,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731731367] [2020-07-20 14:35:53,264 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 14:35:53,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:35:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:35:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:53,444 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 14:35:53,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:35:53,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731731367] [2020-07-20 14:35:53,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:35:53,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:35:53,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900655348] [2020-07-20 14:35:53,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:35:53,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:35:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:35:53,480 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 14:35:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:53,508 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 14:35:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:35:53,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 14:35:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:53,520 INFO L225 Difference]: With dead ends: 33 [2020-07-20 14:35:53,521 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:35:53,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:35:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:35:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:35:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:35:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-20 14:35:53,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-20 14:35:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:53,572 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-20 14:35:53,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:35:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-20 14:35:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:35:53,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:53,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:53,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:53,775 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-20 14:35:53,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:53,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710766295] [2020-07-20 14:35:53,778 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 14:35:53,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:53,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:35:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:53,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:35:53,967 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 14:35:53,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:35:53,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710766295] [2020-07-20 14:35:53,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:35:53,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:35:53,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212445734] [2020-07-20 14:35:53,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:35:53,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:35:53,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:35:53,973 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-20 14:35:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:54,096 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 14:35:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:35:54,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-20 14:35:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:54,101 INFO L225 Difference]: With dead ends: 26 [2020-07-20 14:35:54,101 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 14:35:54,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:35:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 14:35:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-20 14:35:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 14:35:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 14:35:54,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-20 14:35:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:54,112 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 14:35:54,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:35:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 14:35:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 14:35:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:54,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:54,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:54,329 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-20 14:35:54,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:54,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288769947] [2020-07-20 14:35:54,332 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 14:35:54,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:35:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:35:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:54,475 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 14:35:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:54,540 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 14:35:54,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288769947] [2020-07-20 14:35:54,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:54,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-20 14:35:54,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868812409] [2020-07-20 14:35:54,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 14:35:54,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 14:35:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:35:54,544 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-20 14:35:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:54,687 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-20 14:35:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:35:54,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-20 14:35:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:54,690 INFO L225 Difference]: With dead ends: 31 [2020-07-20 14:35:54,690 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 14:35:54,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:35:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 14:35:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-20 14:35:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 14:35:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 14:35:54,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-20 14:35:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:54,699 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 14:35:54,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 14:35:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 14:35:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 14:35:54,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:54,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:54,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:54,915 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-20 14:35:54,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:54,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539334483] [2020-07-20 14:35:54,917 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 14:35:54,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:54,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 14:35:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:55,117 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:35:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:55,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:55,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539334483] [2020-07-20 14:35:55,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:55,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 14:35:55,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301438853] [2020-07-20 14:35:55,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 14:35:55,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 14:35:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:35:55,545 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-20 14:35:56,026 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 14:35:56,167 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2020-07-20 14:35:56,538 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-20 14:35:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:56,750 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-20 14:35:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 14:35:56,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-20 14:35:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:56,753 INFO L225 Difference]: With dead ends: 46 [2020-07-20 14:35:56,754 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 14:35:56,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-20 14:35:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 14:35:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-20 14:35:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 14:35:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 14:35:56,772 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-20 14:35:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:56,773 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 14:35:56,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 14:35:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 14:35:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 14:35:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:56,776 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:56,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:56,978 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-20 14:35:56,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:56,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655050129] [2020-07-20 14:35:56,980 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 14:35:57,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:35:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 14:35:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:57,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 14:35:57,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655050129] [2020-07-20 14:35:57,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:57,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-07-20 14:35:57,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587483781] [2020-07-20 14:35:57,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 14:35:57,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:57,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 14:35:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:35:57,300 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 17 states. [2020-07-20 14:35:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:35:57,685 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 14:35:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 14:35:57,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-07-20 14:35:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:35:57,692 INFO L225 Difference]: With dead ends: 48 [2020-07-20 14:35:57,692 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:35:57,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-07-20 14:35:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:35:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-20 14:35:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 14:35:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-20 14:35:57,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-20 14:35:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:35:57,711 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-20 14:35:57,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 14:35:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-20 14:35:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 14:35:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:35:57,714 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:35:57,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:35:57,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:35:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:35:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-20 14:35:57,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:35:57,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824673813] [2020-07-20 14:35:57,917 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 14:35:57,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:35:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:35:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 14:35:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:35:58,142 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:35:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:35:58,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:58,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824673813] [2020-07-20 14:35:58,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:58,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-20 14:35:58,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054727202] [2020-07-20 14:35:58,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 14:35:58,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 14:35:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-20 14:35:58,987 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-20 14:36:00,025 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-20 14:36:00,363 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-20 14:36:00,931 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-20 14:36:01,143 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:01,336 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 14:36:01,722 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-20 14:36:01,915 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-20 14:36:02,090 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-07-20 14:36:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:36:02,452 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-20 14:36:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 14:36:02,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-20 14:36:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:36:02,454 INFO L225 Difference]: With dead ends: 62 [2020-07-20 14:36:02,454 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 14:36:02,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 14:36:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 14:36:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 14:36:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 14:36:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-20 14:36:02,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-20 14:36:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:36:02,469 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-20 14:36:02,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 14:36:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-20 14:36:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 14:36:02,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:36:02,472 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:36:02,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:36:02,686 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:36:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:36:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-20 14:36:02,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:36:02,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634098150] [2020-07-20 14:36:02,688 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 14:36:02,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:36:02,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:36:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 14:36:02,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:36:03,301 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:36:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:36:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:36:03,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:36:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:36:05,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634098150] [2020-07-20 14:36:05,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:36:05,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-20 14:36:05,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272370486] [2020-07-20 14:36:05,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 14:36:05,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:36:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 14:36:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=2356, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 14:36:05,565 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-20 14:36:12,436 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 14:36:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:36:12,489 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-07-20 14:36:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-20 14:36:12,492 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-20 14:36:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:36:12,494 INFO L225 Difference]: With dead ends: 108 [2020-07-20 14:36:12,494 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 14:36:12,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1705, Invalid=10727, Unknown=0, NotChecked=0, Total=12432 [2020-07-20 14:36:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 14:36:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-07-20 14:36:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 14:36:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-07-20 14:36:12,516 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 53 [2020-07-20 14:36:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:36:12,517 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-07-20 14:36:12,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 14:36:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-07-20 14:36:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 14:36:12,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:36:12,521 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:36:12,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:36:12,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:36:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:36:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1569132688, now seen corresponding path program 5 times [2020-07-20 14:36:12,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:36:12,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093226561] [2020-07-20 14:36:12,732 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:36:12,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:36:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:36:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 92 conjunts are in the unsatisfiable core [2020-07-20 14:36:12,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:36:14,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:36:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:36:14,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:36:15,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:36:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:36:23,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093226561] [2020-07-20 14:36:23,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:36:23,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 95 [2020-07-20 14:36:23,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916114413] [2020-07-20 14:36:23,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-20 14:36:23,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:36:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-20 14:36:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1889, Invalid=7041, Unknown=0, NotChecked=0, Total=8930 [2020-07-20 14:36:23,482 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2020-07-20 14:36:28,350 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 14:36:28,908 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 14:36:29,174 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-20 14:36:29,677 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 14:36:30,477 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:30,827 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:31,160 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:31,528 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:31,851 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:32,203 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:32,541 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 14:36:32,930 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:33,243 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:33,591 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:36:33,926 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:36:34,332 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:36:34,693 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 14:36:35,081 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:36:35,393 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 14:36:35,753 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:36,089 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:36,450 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:36,779 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:37,243 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:37,580 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:37,949 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:38,300 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:38,702 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:39,080 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:39,509 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:39,878 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:40,254 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:40,632 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:41,068 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:41,476 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:41,896 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:42,267 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:42,678 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:43,088 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:43,539 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:43,961 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:44,429 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:44,817 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:45,235 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:45,643 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:46,109 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:46,540 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:47,014 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:47,429 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:47,895 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:48,335 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:48,834 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:49,302 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:36:49,815 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:36:50,269 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:50,748 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:51,201 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:36:51,756 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:36:52,285 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 14:36:52,821 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:36:53,301 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:36:53,811 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 14:36:54,290 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 14:36:54,848 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:36:55,332 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 14:36:55,904 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:36:56,399 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 14:36:56,936 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:36:57,465 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:36:58,110 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:36:58,802 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 14:36:59,435 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 14:36:59,965 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 14:37:00,530 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 14:37:01,114 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 14:37:01,791 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 14:37:02,407 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 14:37:03,679 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-20 14:37:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:37:03,721 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2020-07-20 14:37:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-07-20 14:37:03,724 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2020-07-20 14:37:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:37:03,726 INFO L225 Difference]: With dead ends: 205 [2020-07-20 14:37:03,727 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 14:37:03,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10623 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=8773, Invalid=34699, Unknown=0, NotChecked=0, Total=43472 [2020-07-20 14:37:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 14:37:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-07-20 14:37:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-20 14:37:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2020-07-20 14:37:03,771 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 95 [2020-07-20 14:37:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:37:03,772 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2020-07-20 14:37:03,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-07-20 14:37:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2020-07-20 14:37:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-20 14:37:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:37:03,777 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:37:03,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:37:03,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:37:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:37:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1757446034, now seen corresponding path program 6 times [2020-07-20 14:37:03,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:37:03,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401565260] [2020-07-20 14:37:03,994 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:37:04,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:37:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:37:04,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 182 conjunts are in the unsatisfiable core [2020-07-20 14:37:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:37:15,870 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:37:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:37:16,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:37:17,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:37:18,534 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 14:38:15,207 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:38:16,381 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:38:19,033 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:38:20,138 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:38:23,664 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:38:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:38:28,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401565260] [2020-07-20 14:38:28,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:38:28,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 185 [2020-07-20 14:38:28,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180327496] [2020-07-20 14:38:28,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 185 states [2020-07-20 14:38:28,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:38:28,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2020-07-20 14:38:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7574, Invalid=26466, Unknown=0, NotChecked=0, Total=34040 [2020-07-20 14:38:28,525 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 185 states. [2020-07-20 14:39:16,074 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-07-20 14:39:16,872 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-07-20 14:39:18,387 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 14:39:19,763 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 14:39:21,023 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 14:39:22,418 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-07-20 14:39:23,460 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 14:39:24,605 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 14:39:25,625 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 14:39:26,892 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-20 14:39:28,345 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:39:29,907 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:39:31,235 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:39:32,621 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:39:34,227 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:39:35,950 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:39:37,419 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 14:39:39,233 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:39:40,602 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:39:42,293 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:39:43,834 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:39:45,640 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:39:47,381 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 14:39:49,350 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:39:50,985 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 14:39:52,935 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:39:54,730 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:39:56,688 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:39:59,184 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:40:01,206 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:03,068 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:40:04,743 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:06,262 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:08,171 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:09,796 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:40:11,539 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:13,007 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:40:14,689 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:16,278 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:18,083 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:20,030 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:40:21,990 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:23,595 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:40:25,472 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:27,435 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:29,609 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:32,431 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:40:34,651 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:36,367 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:40:38,401 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:40,502 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:42,902 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:45,031 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:40:47,332 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:49,227 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:40:51,647 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:53,935 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:40:56,393 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:40:59,696 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:41:01,843 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:03,521 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:41:05,507 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:07,615 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:10,293 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:13,835 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:41:16,494 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:18,110 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:41:20,222 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:22,104 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:24,659 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:26,941 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:41:29,557 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:31,315 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:41:33,498 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:35,393 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:38,044 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:40,286 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:41:42,987 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:45,183 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:41:47,600 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:49,782 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:41:52,520 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:54,809 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:41:57,289 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:41:59,512 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:42:01,603 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:04,141 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:06,965 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:09,659 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:42:12,092 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:14,216 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:42:16,839 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:19,238 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:22,014 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:25,152 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:42:27,986 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:29,974 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:42:32,895 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:35,670 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:38,739 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:42,115 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:42:45,740 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:48,077 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:42:50,711 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:52,931 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:42:55,629 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:42:58,189 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:43:01,070 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:03,443 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:43:06,050 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:08,314 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:11,177 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:14,014 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:43:16,566 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:18,828 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:43:21,384 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:23,785 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:26,273 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:29,055 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:43:31,989 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:34,532 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:43:36,963 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:39,354 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:41,980 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:44,795 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:43:47,542 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:43:50,033 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:43:52,794 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:55,587 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:43:58,624 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:01,526 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:44:04,257 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:06,648 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:44:09,576 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:12,210 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:14,603 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:17,186 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:44:19,389 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:21,343 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:44:23,751 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:25,920 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:28,361 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:31,107 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:44:33,611 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:35,699 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:44:38,270 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:40,598 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:43,134 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:45,869 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 14:44:48,606 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 14:44:50,533 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:44:53,230 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:55,516 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 14:44:58,344 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:45:01,207 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 14:45:03,834 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:45:06,162 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 14:45:08,919 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 14:45:11,020 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 14:45:13,809 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:45:16,553 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 14:45:19,644 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 14:45:22,200 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 14:45:25,033 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:45:27,763 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 14:45:31,019 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 14:45:35,392 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 14:45:38,499 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 14:45:41,122 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 14:45:44,012 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 14:45:46,861 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 14:45:50,121 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 14:45:53,415 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 14:45:54,855 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 14:45:55,912 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 14:45:57,689 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 14:45:59,689 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-20 14:45:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:45:59,789 INFO L93 Difference]: Finished difference Result 400 states and 429 transitions. [2020-07-20 14:45:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2020-07-20 14:45:59,799 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 185 [2020-07-20 14:45:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:45:59,802 INFO L225 Difference]: With dead ends: 400 [2020-07-20 14:45:59,802 INFO L226 Difference]: Without dead ends: 366 [2020-07-20 14:45:59,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44163 ImplicationChecksByTransitivity, 486.4s TimeCoverageRelationStatistics Valid=35743, Invalid=139399, Unknown=0, NotChecked=0, Total=175142 [2020-07-20 14:45:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-20 14:45:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2020-07-20 14:45:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-07-20 14:45:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 366 transitions. [2020-07-20 14:45:59,878 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 366 transitions. Word has length 185 [2020-07-20 14:45:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:45:59,895 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 366 transitions. [2020-07-20 14:45:59,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 185 states. [2020-07-20 14:45:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 366 transitions. [2020-07-20 14:45:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-07-20 14:45:59,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:45:59,906 INFO L422 BasicCegarLoop]: trace histogram [118, 118, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:46:00,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:46:00,107 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:46:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:46:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1265712214, now seen corresponding path program 7 times [2020-07-20 14:46:00,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:46:00,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843585958] [2020-07-20 14:46:00,109 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:46:00,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:46:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:46:00,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 362 conjunts are in the unsatisfiable core [2020-07-20 14:46:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:08,515 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:48:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20827 backedges. 0 proven. 20827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:48:12,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:48:16,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:48:25,442 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 14:48:27,952 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 14:48:30,435 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 14:48:32,952 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 14:48:35,545 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 14:48:38,088 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 14:48:40,736 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 14:48:43,082 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 14:48:45,477 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:48:48,074 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:48:50,614 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:48:53,188 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:48:55,902 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:48:58,472 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:01,111 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:03,849 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:06,381 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:08,966 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:11,793 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:14,462 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:17,189 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:20,134 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:22,910 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:25,696 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:28,537 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:31,426 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:33,798 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:36,036 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:38,090 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:40,135 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:42,307 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:44,365 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:46,468 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:48,717 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:50,800 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:52,926 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:55,206 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:57,333 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:49:59,497 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:50:01,847 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:50:03,955 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:50:06,126 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 14:50:08,576 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 24