/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:01:46,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:01:46,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:01:46,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:01:46,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:01:46,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:01:46,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:01:46,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:01:46,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:01:46,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:01:46,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:01:46,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:01:46,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:01:46,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:01:46,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:01:46,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:01:46,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:01:46,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:01:46,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:01:46,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:01:46,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:01:46,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:01:46,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:01:46,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:01:46,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:01:46,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:01:46,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:01:46,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:01:46,671 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 17:01:46,691 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:01:46,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:01:46,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:01:46,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:01:46,694 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:01:46,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:01:46,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:01:46,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:01:46,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:01:46,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:01:46,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:01:46,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:01:46,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:01:46,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:01:46,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:01:46,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:01:46,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:01:46,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:01:46,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:01:46,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:01:46,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:01:46,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:01:46,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:01:46,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:01:46,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:01:46,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:01:46,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:46,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:01:46,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:01:46,700 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_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:01:47,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:01:47,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:01:47,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:01:47,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:01:47,080 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:01:47,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-21 17:01:47,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e50309/cf5da1c7f49b4d078cd748bfd9fd4a52/FLAG0dccfd030 [2020-07-21 17:01:47,964 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:01:47,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-21 17:01:47,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e50309/cf5da1c7f49b4d078cd748bfd9fd4a52/FLAG0dccfd030 [2020-07-21 17:01:48,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367e50309/cf5da1c7f49b4d078cd748bfd9fd4a52 [2020-07-21 17:01:48,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:01:48,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:01:48,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:01:48,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:01:48,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:01:48,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eaf402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48, skipping insertion in model container [2020-07-21 17:01:48,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:01:48,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:01:48,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:01:48,601 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:01:48,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:01:48,847 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:01:48,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48 WrapperNode [2020-07-21 17:01:48,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:01:48,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:01:48,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:01:48,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:01:48,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (1/1) ... [2020-07-21 17:01:48,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:01:48,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:01:48,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:01:48,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:01:48,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (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 17:01:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:01:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:01:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:01:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:01:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-21 17:01:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-21 17:01:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:01:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:01:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 17:01:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 17:01:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 17:01:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 17:01:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 17:01:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:01:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:01:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 17:01:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 17:01:52,171 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:01:52,172 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:01:52,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:01:52 BoogieIcfgContainer [2020-07-21 17:01:52,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:01:52,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:01:52,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:01:52,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:01:52,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:01:48" (1/3) ... [2020-07-21 17:01:52,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4548f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:01:52, skipping insertion in model container [2020-07-21 17:01:52,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:01:48" (2/3) ... [2020-07-21 17:01:52,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4548f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:01:52, skipping insertion in model container [2020-07-21 17:01:52,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:01:52" (3/3) ... [2020-07-21 17:01:52,193 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-07-21 17:01:52,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:01:52,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:01:52,244 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:01:52,285 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:01:52,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:01:52,286 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:01:52,286 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:01:52,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:01:52,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:01:52,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:01:52,287 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:01:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 17:01:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 17:01:52,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:52,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:52,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-07-21 17:01:52,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:52,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130547885] [2020-07-21 17:01:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:52,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:01:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:52,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:01:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:52,883 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 17:01:52,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:01:52,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130547885] [2020-07-21 17:01:52,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:01:52,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:01:52,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913928428] [2020-07-21 17:01:52,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:01:52,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:01:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:01:52,925 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-21 17:01:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:53,033 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-07-21 17:01:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:01:53,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 17:01:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:53,055 INFO L225 Difference]: With dead ends: 38 [2020-07-21 17:01:53,056 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 17:01:53,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:01:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 17:01:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-07-21 17:01:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 17:01:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-21 17:01:53,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-07-21 17:01:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:53,121 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-21 17:01:53,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:01:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-21 17:01:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 17:01:53,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:53,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:53,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:53,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-07-21 17:01:53,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:53,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414725215] [2020-07-21 17:01:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:53,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:01:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:01:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:53,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:53,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414725215] [2020-07-21 17:01:53,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:53,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 17:01:53,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974407479] [2020-07-21 17:01:53,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:01:53,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:01:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:01:53,678 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2020-07-21 17:01:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:56,059 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-21 17:01:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 17:01:56,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 17:01:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:56,062 INFO L225 Difference]: With dead ends: 38 [2020-07-21 17:01:56,063 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:01:56,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 17:01:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:01:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-21 17:01:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 17:01:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-21 17:01:56,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2020-07-21 17:01:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:56,078 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-21 17:01:56,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:01:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-21 17:01:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 17:01:56,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:56,080 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:56,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:56,293 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 2 times [2020-07-21 17:01:56,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:56,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681873365] [2020-07-21 17:01:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:02:17,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:02:17,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:02:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 17:02:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:02:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:02:18,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:02:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:02:18,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681873365] [2020-07-21 17:02:18,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:02:18,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 17:02:18,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079196244] [2020-07-21 17:02:18,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 17:02:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:02:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 17:02:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-21 17:02:18,463 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-07-21 17:02:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:02:35,735 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-07-21 17:02:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 17:02:35,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-21 17:02:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:02:35,739 INFO L225 Difference]: With dead ends: 68 [2020-07-21 17:02:35,739 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 17:02:35,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=192, Invalid=456, Unknown=2, NotChecked=0, Total=650 [2020-07-21 17:02:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 17:02:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-07-21 17:02:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 17:02:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-07-21 17:02:35,763 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 32 [2020-07-21 17:02:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:02:35,765 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-07-21 17:02:35,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 17:02:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-07-21 17:02:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 17:02:35,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:02:35,773 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:02:35,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:02:35,986 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:02:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:02:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1772338347, now seen corresponding path program 3 times [2020-07-21 17:02:35,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:02:35,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078280498] [2020-07-21 17:02:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:03:13,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:03:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:03:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 17:03:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:03:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:03:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:03:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 250 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:03:20,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078280498] [2020-07-21 17:03:20,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:03:20,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 17:03:20,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905627489] [2020-07-21 17:03:20,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 17:03:20,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:03:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 17:03:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=477, Unknown=2, NotChecked=0, Total=650 [2020-07-21 17:03:20,594 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 26 states. [2020-07-21 17:03:42,193 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 17:03:44,716 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 17:03:48,073 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 17:03:48,850 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 17:03:52,087 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 17:03:56,927 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-21 17:04:00,687 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-21 17:04:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:04:14,156 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-07-21 17:04:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 17:04:14,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-07-21 17:04:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:04:14,164 INFO L225 Difference]: With dead ends: 128 [2020-07-21 17:04:14,164 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 17:04:14,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=666, Invalid=1780, Unknown=4, NotChecked=0, Total=2450 [2020-07-21 17:04:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 17:04:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-07-21 17:04:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-21 17:04:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-07-21 17:04:14,186 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 62 [2020-07-21 17:04:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:04:14,187 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-07-21 17:04:14,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 17:04:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-07-21 17:04:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 17:04:14,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:04:14,190 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:04:14,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:04:14,392 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:04:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:04:14,393 INFO L82 PathProgramCache]: Analyzing trace with hash -357330133, now seen corresponding path program 4 times [2020-07-21 17:04:14,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:04:14,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505585706] [2020-07-21 17:04:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:08:15,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:08:15,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:08:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-21 17:08:32,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:08:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:08:33,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:09:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1185 refuted. 36 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:09:05,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505585706] [2020-07-21 17:09:05,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:09:05,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 17:09:05,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853431032] [2020-07-21 17:09:05,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 17:09:05,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:09:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 17:09:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1815, Unknown=14, NotChecked=0, Total=2450 [2020-07-21 17:09:05,221 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 50 states. [2020-07-21 17:09:24,040 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-21 17:09:29,794 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-21 17:09:37,590 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-21 17:09:44,507 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-21 17:09:52,974 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-21 17:10:02,413 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-21 17:10:10,553 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-21 17:10:18,138 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-21 17:10:25,139 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-21 17:10:32,714 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 17:10:43,480 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 17:10:57,782 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 17:11:04,917 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 17:11:10,841 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-21 17:11:18,615 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-21 17:11:26,210 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-21 17:11:40,626 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 17:11:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:11:49,707 INFO L93 Difference]: Finished difference Result 228 states and 247 transitions. [2020-07-21 17:11:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 17:11:49,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2020-07-21 17:11:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:11:49,714 INFO L225 Difference]: With dead ends: 228 [2020-07-21 17:11:49,715 INFO L226 Difference]: Without dead ends: 225 [2020-07-21 17:11:49,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 177.1s TimeCoverageRelationStatistics Valid=2176, Invalid=6537, Unknown=29, NotChecked=0, Total=8742 [2020-07-21 17:11:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-21 17:11:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-07-21 17:11:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-21 17:11:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-07-21 17:11:49,750 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 122 [2020-07-21 17:11:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:11:49,752 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-07-21 17:11:49,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 17:11:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-07-21 17:11:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-21 17:11:49,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:11:49,758 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:11:49,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:11:49,973 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:11:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:11:49,974 INFO L82 PathProgramCache]: Analyzing trace with hash -576259925, now seen corresponding path program 5 times [2020-07-21 17:11:49,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:11:49,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36935231] [2020-07-21 17:11:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in