/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 BIGGEST_EQUIVALENCE_CLASS --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/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:59:37,990 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:59:38,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:59:38,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:59:38,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:59:38,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:59:38,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:59:38,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:59:38,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:59:38,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:59:38,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:59:38,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:59:38,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:59:38,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:59:38,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:59:38,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:59:38,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:59:38,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:59:38,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:59:38,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:59:38,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:59:38,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:59:38,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:59:38,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:59:38,059 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:59:38,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:59:38,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:59:38,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:59:38,062 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:59:38,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:59:38,062 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:59:38,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:59:38,063 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:59:38,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:59:38,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:59:38,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:59:38,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:59:38,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:59:38,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:59:38,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:59:38,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:59:38,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:59:38,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:59:38,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:59:38,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:59:38,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:38,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:59:38,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:59:38,067 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:59:38,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:59:38,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:59:38,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:59:38,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:59:38,413 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:59:38,414 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 00:59:38,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f17287d/d3ade2758224453f8dff800f5a110f39/FLAG596fcfdd3 [2020-07-21 00:59:39,025 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:59:39,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 00:59:39,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f17287d/d3ade2758224453f8dff800f5a110f39/FLAG596fcfdd3 [2020-07-21 00:59:39,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f17287d/d3ade2758224453f8dff800f5a110f39 [2020-07-21 00:59:39,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:59:39,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:59:39,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:39,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:59:39,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:59:39,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae33627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39, skipping insertion in model container [2020-07-21 00:59:39,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:59:39,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:59:39,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:39,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:59:39,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:39,610 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:59:39,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39 WrapperNode [2020-07-21 00:59:39,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:39,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:59:39,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:59:39,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:59:39,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... [2020-07-21 00:59:39,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:59:39,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:59:39,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:59:39,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:59:39,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:59:39,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:59:39,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:59:39,819 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 00:59:39,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:59:39,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 00:59:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:59:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 00:59:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:59:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:59:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:59:40,020 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:59:40,020 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:59:40,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:40 BoogieIcfgContainer [2020-07-21 00:59:40,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:59:40,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:59:40,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:59:40,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:59:40,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:59:39" (1/3) ... [2020-07-21 00:59:40,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa56cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:40, skipping insertion in model container [2020-07-21 00:59:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:39" (2/3) ... [2020-07-21 00:59:40,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa56cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:40, skipping insertion in model container [2020-07-21 00:59:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:40" (3/3) ... [2020-07-21 00:59:40,034 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-07-21 00:59:40,045 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:59:40,053 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:59:40,068 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:59:40,096 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:59:40,096 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:59:40,097 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:59:40,097 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:59:40,097 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:59:40,097 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:59:40,097 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:59:40,098 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:59:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 00:59:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:59:40,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:40,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:40,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 00:59:40,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:40,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327518672] [2020-07-21 00:59:40,142 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 [2020-07-21 00:59:40,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:59:40,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:59:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:59:40,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:59:40,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327518672] [2020-07-21 00:59:40,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:59:40,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:59:40,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448368543] [2020-07-21 00:59:40,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:59:40,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:59:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:59:40,378 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 00:59:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:40,459 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 00:59:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:59:40,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:59:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:40,473 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:59:40,473 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 00:59:40,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:59:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 00:59:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 00:59:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 00:59:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 00:59:40,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 00:59:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:40,527 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 00:59:40,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:59:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 00:59:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:59:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:40,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:40,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:40,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 00:59:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:40,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467953574] [2020-07-21 00:59:40,753 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 [2020-07-21 00:59:40,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:40,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:59:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 00:59:40,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 00:59:41,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467953574] [2020-07-21 00:59:41,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:41,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 00:59:41,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584504322] [2020-07-21 00:59:41,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:59:41,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:59:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:59:41,067 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 00:59:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:41,125 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 00:59:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:59:41,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 00:59:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:41,127 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:59:41,128 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:59:41,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:59:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:59:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:59:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:59:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 00:59:41,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 00:59:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:41,138 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 00:59:41,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:59:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 00:59:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:59:41,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:41,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:41,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:41,357 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 00:59:41,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:41,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35909517] [2020-07-21 00:59:41,360 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 [2020-07-21 00:59:41,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:41,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:59:41,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 00:59:41,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 00:59:41,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35909517] [2020-07-21 00:59:41,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:41,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 00:59:41,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481017315] [2020-07-21 00:59:41,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:59:41,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:59:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:59:41,999 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 00:59:44,384 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 00:59:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:44,475 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 00:59:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 00:59:44,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 00:59:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:44,478 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:59:44,478 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 00:59:44,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:59:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 00:59:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 00:59:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:59:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 00:59:44,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 00:59:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:44,489 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 00:59:44,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:59:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 00:59:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 00:59:44,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:44,492 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:44,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:44,706 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 00:59:44,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:44,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314491127] [2020-07-21 00:59:44,708 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 [2020-07-21 00:59:44,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:44,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 00:59:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 00:59:45,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 69 refuted. 8 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 00:59:59,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314491127] [2020-07-21 00:59:59,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:59,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 00:59:59,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306384409] [2020-07-21 00:59:59,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:59:59,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:59:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1070, Unknown=6, NotChecked=0, Total=1260 [2020-07-21 00:59:59,128 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 01:00:01,825 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 01:00:06,725 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 01:00:09,200 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 01:00:16,658 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 01:00:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:00:17,189 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 01:00:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 01:00:17,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 01:00:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:00:17,194 INFO L225 Difference]: With dead ends: 66 [2020-07-21 01:00:17,195 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 01:00:17,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=381, Invalid=1867, Unknown=8, NotChecked=0, Total=2256 [2020-07-21 01:00:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 01:00:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 01:00:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 01:00:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 01:00:17,214 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 01:00:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:00:17,215 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 01:00:17,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 01:00:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 01:00:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 01:00:17,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:00:17,219 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:00:17,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:00:17,423 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:00:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:00:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 01:00:17,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:00:17,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214199259] [2020-07-21 01:00:17,425 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 [2020-07-21 01:00:21,076 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:00:21,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:00:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 01:00:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:00:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 01:00:21,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 334 refuted. 11 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 01:00:43,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214199259] [2020-07-21 01:00:43,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:43,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 01:00:43,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047686293] [2020-07-21 01:00:43,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 01:00:43,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 01:00:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3932, Unknown=8, NotChecked=0, Total=4556 [2020-07-21 01:00:43,695 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 01:00:47,740 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 01:00:54,318 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 01:00:58,433 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 01:01:07,400 WARN L193 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 01:01:10,361 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 01:01:13,958 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 01:01:25,453 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-21 01:01:29,308 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 01:01:34,512 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 01:01:39,179 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 01:01:43,918 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 01:01:50,840 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 01:02:00,780 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 01:02:03,467 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 01:02:05,338 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 01:02:26,835 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 01:02:32,272 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 01:02:46,492 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 01:03:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:03:10,485 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 01:03:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 01:03:10,487 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 01:03:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:03:10,490 INFO L225 Difference]: With dead ends: 114 [2020-07-21 01:03:10,490 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 01:03:10,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 162.2s TimeCoverageRelationStatistics Valid=1522, Invalid=7575, Unknown=23, NotChecked=0, Total=9120 [2020-07-21 01:03:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 01:03:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 01:03:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 01:03:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 01:03:10,511 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 01:03:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:03:10,512 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 01:03:10,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 01:03:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 01:03:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 01:03:10,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:03:10,517 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:03:10,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:03:10,724 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:03:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:03:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 01:03:10,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:03:10,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985459120] [2020-07-21 01:03:10,726 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 [2020-07-21 01:04:15,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:04:15,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:04:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-21 01:04:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:04:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 01:04:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:06:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1418 refuted. 39 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 01:06:04,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985459120] [2020-07-21 01:06:04,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:06:04,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 01:06:04,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780255250] [2020-07-21 01:06:04,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 01:06:04,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:06:04,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 01:06:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=15006, Unknown=38, NotChecked=0, Total=17292 [2020-07-21 01:06:04,478 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 01:06:53,169 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-21 01:07:38,031 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-21 01:08:28,152 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-21 01:09:18,369 WARN L193 SmtUtils]: Spent 4.94 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-21 01:10:10,234 WARN L193 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 01:11:06,485 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-21 01:11:55,040 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-21 01:12:40,609 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 141 DAG size of output: 11 [2020-07-21 01:13:27,433 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 138 DAG size of output: 13 [2020-07-21 01:14:13,604 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 136 DAG size of output: 11