/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_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:59:08,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:59:08,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:59:08,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:59:08,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:59:08,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:59:08,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:59:08,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:59:08,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:59:08,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:59:08,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:59:08,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:59:08,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:59:08,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:59:08,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:59:08,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:59:08,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:59:08,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:59:08,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:59:08,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:59:08,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:59:08,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:59:08,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:59:08,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:59:08,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:59:08,751 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 00:59:08,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:59:08,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:59:08,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:59:08,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:59:08,769 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:59:08,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:59:08,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:59:08,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:59:08,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:59:08,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:59:08,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:59:08,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:59:08,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:59:08,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:59:08,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:59:08,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:59:08,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:59:08,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:59:08,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:59:08,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:59:08,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:59:08,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:59:08,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:59:08,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:59:08,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:59:08,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:59:08,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:08,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:59:08,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:59:08,774 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 00:59:09,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:59:09,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:59:09,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:59:09,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:59:09,079 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:59:09,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2020-07-21 00:59:09,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4c7fb7/1ceaafaa7f824290ae8818bd2eca0655/FLAGcad332cd9 [2020-07-21 00:59:09,667 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:59:09,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o100.c [2020-07-21 00:59:09,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4c7fb7/1ceaafaa7f824290ae8818bd2eca0655/FLAGcad332cd9 [2020-07-21 00:59:09,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b4c7fb7/1ceaafaa7f824290ae8818bd2eca0655 [2020-07-21 00:59:10,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:59:10,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:59:10,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:10,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:59:10,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:59:10,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:09" (1/1) ... [2020-07-21 00:59:10,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcd975e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10, skipping insertion in model container [2020-07-21 00:59:10,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:59:09" (1/1) ... [2020-07-21 00:59:10,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:59:10,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:59:10,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:10,269 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:59:10,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:59:10,296 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:59:10,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10 WrapperNode [2020-07-21 00:59:10,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:59:10,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:59:10,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:59:10,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:59:10,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (1/1) ... [2020-07-21 00:59:10,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:59:10,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:59:10,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:59:10,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:59:10,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (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 00:59:10,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:59:10,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:59:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 00:59:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:59:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 00:59:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:59:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 00:59:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:59:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:59:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:59:10,633 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:59:10,634 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:59:10,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:10 BoogieIcfgContainer [2020-07-21 00:59:10,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:59:10,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:59:10,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:59:10,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:59:10,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:59:09" (1/3) ... [2020-07-21 00:59:10,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa3cf7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:10, skipping insertion in model container [2020-07-21 00:59:10,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:59:10" (2/3) ... [2020-07-21 00:59:10,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa3cf7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:59:10, skipping insertion in model container [2020-07-21 00:59:10,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:59:10" (3/3) ... [2020-07-21 00:59:10,645 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2020-07-21 00:59:10,653 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:59:10,659 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:59:10,674 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:59:10,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:59:10,699 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:59:10,699 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:59:10,699 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:59:10,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:59:10,699 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:59:10,700 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:59:10,700 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:59:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 00:59:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:59:10,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:10,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:59:10,727 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 00:59:10,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:10,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45046878] [2020-07-21 00:59:10,739 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 00:59:10,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:59:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:59:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:10,924 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 00:59:10,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:59:10,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45046878] [2020-07-21 00:59:10,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:59:10,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:59:10,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448702837] [2020-07-21 00:59:10,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:59:10,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:59:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:59:10,956 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 00:59:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:11,061 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 00:59:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:59:11,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:59:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:11,073 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:59:11,074 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 00:59:11,078 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 00:59:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 00:59:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 00:59:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 00:59:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 00:59:11,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 00:59:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:11,125 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 00:59:11,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:59:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 00:59:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:59:11,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:11,128 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 00:59:11,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:11,344 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 00:59:11,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:11,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60425595] [2020-07-21 00:59:11,347 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 00:59:11,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:11,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:59:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:11,445 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 00:59:11,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:11,642 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 00:59:11,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60425595] [2020-07-21 00:59:11,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:11,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 00:59:11,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724306400] [2020-07-21 00:59:11,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:59:11,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:59:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:59:11,647 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 00:59:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:11,750 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 00:59:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:59:11,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 00:59:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:11,752 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:59:11,752 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:59:11,754 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 00:59:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:59:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:59:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:59:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 00:59:11,761 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 00:59:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:11,762 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 00:59:11,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:59:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 00:59:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 00:59:11,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:11,764 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 00:59:11,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:11,965 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 00:59:11,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507963359] [2020-07-21 00:59:11,968 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 00:59:12,009 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:59:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:12,125 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 00:59:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 00:59:14,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507963359] [2020-07-21 00:59:14,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:14,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 00:59:14,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472917172] [2020-07-21 00:59:14,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:59:14,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:59:14,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=315, Unknown=1, NotChecked=0, Total=380 [2020-07-21 00:59:14,723 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 00:59:15,086 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-07-21 00:59:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:19,522 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 00:59:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 00:59:19,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 00:59:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:19,526 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:59:19,526 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 00:59:19,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=98, Invalid=451, Unknown=3, NotChecked=0, Total=552 [2020-07-21 00:59:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 00:59:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 00:59:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:59:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 00:59:19,536 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 00:59:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:19,536 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 00:59:19,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:59:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 00:59:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 00:59:19,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:19,539 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 00:59:19,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:19,741 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 00:59:19,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:19,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055523442] [2020-07-21 00:59:19,743 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 00:59:19,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 00:59:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:20,057 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 00:59:20,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:59:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 74 refuted. 3 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 00:59:30,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055523442] [2020-07-21 00:59:30,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:59:30,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 00:59:30,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457603511] [2020-07-21 00:59:30,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:59:30,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:59:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:59:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1072, Unknown=4, NotChecked=0, Total=1260 [2020-07-21 00:59:30,087 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 00:59:31,382 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 00:59:40,578 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-21 00:59:45,596 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-07-21 00:59:47,935 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 00:59:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:59:48,040 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 00:59:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 00:59:48,042 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 00:59:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:59:48,044 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:59:48,044 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 00:59:48,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=380, Invalid=1870, Unknown=6, NotChecked=0, Total=2256 [2020-07-21 00:59:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 00:59:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 00:59:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:59:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 00:59:48,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 00:59:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:59:48,058 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 00:59:48,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 00:59:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 00:59:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 00:59:48,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:59:48,062 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 00:59:48,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:59:48,264 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:59:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:59:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 00:59:48,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:59:48,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892265572] [2020-07-21 00:59:48,266 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 00:59:51,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:59:51,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:59:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 00:59:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:59:52,663 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 00:59:52,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:00:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 337 refuted. 8 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 01:00:23,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892265572] [2020-07-21 01:00:23,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:00:23,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 01:00:23,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985479194] [2020-07-21 01:00:23,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 01:00:23,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:00:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 01:00:23,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3928, Unknown=12, NotChecked=0, Total=4556 [2020-07-21 01:00:23,211 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 01:00:30,728 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 01:00:43,720 WARN L193 SmtUtils]: Spent 9.02 s on a formula simplification. DAG size of input: 76 DAG size of output: 16 [2020-07-21 01:00:49,820 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 01:00:54,097 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 01:01:04,659 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 01:01:14,844 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 01:01:19,436 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-21 01:01:27,298 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 01:01:30,421 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 01:01:34,884 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 01:01:37,953 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 01:01:40,967 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 01:01:45,363 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 01:01:51,134 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 01:01:57,422 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 01:02:01,608 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 01:02:07,001 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 01:02:12,748 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 01:02:16,867 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 01:02:28,477 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 01:02:46,682 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-21 01:03:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:03:08,702 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 01:03:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 01:03:08,704 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 01:03:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:03:08,708 INFO L225 Difference]: With dead ends: 114 [2020-07-21 01:03:08,709 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 01:03:08,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 193.2s TimeCoverageRelationStatistics Valid=1522, Invalid=7580, Unknown=18, NotChecked=0, Total=9120 [2020-07-21 01:03:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 01:03:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 01:03:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 01:03:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 01:03:08,733 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 01:03:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:03:08,734 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 01:03:08,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 01:03:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 01:03:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 01:03:08,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:03:08,739 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 01:03:08,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:03:08,945 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:03:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:03:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 01:03:08,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:03:08,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778956159] [2020-07-21 01:03:08,948 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 01:04:17,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:04:17,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:04:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-21 01:04:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:04:22,414 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 01:04:22,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:07:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1391 refuted. 66 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 01:07:06,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778956159] [2020-07-21 01:07:06,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:07:06,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 01:07:06,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449345770] [2020-07-21 01:07:06,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 01:07:06,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 01:07:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14985, Unknown=59, NotChecked=0, Total=17292 [2020-07-21 01:07:06,073 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 01:08:22,161 WARN L193 SmtUtils]: Spent 7.56 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-21 01:08:24,370 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_id_#res| 20) 4294967296) 100) (< (mod (+ |c_id_#res| 3) 4294967296) 100) (< (mod (+ |c_id_#res| 22) 4294967296) 100) (< (mod (+ |c_id_#res| 24) 4294967296) 100) (< (mod (+ |c_id_#res| 23) 4294967296) 100) (< (mod (+ |c_id_#res| 6) 4294967296) 100) (< (mod (+ |c_id_#res| 17) 4294967296) 100) (< (mod (+ |c_id_#res| 7) 4294967296) 100) (< (mod (+ |c_id_#res| 15) 4294967296) 100) (< (mod (+ |c_id_#res| 26) 4294967296) 100) (< (mod (+ |c_id_#res| 18) 4294967296) 100) (< (mod |c_id_#res| 4294967296) 100) (< (mod (+ |c_id_#res| 5) 4294967296) 100) (< (mod (+ |c_id_#res| 11) 4294967296) 100) (< (mod (+ |c_id_#res| 1) 4294967296) 100) (< (mod (+ |c_id_#res| 2) 4294967296) 100) (< (mod (+ |c_id_#res| 14) 4294967296) 100) (< (mod (+ |c_id_#res| 8) 4294967296) 100) (< (mod (+ |c_id_#res| 16) 4294967296) 100) (< (mod (+ |c_id_#res| 12) 4294967296) 100) (< (mod (+ |c_id_#res| 9) 4294967296) 100) (< (mod (+ |c_id_#res| 25) 4294967296) 100) (< (mod (+ |c_id_#res| 4) 4294967296) 100) (< (mod (+ |c_id_#res| 19) 4294967296) 100) (< (mod (+ |c_id_#res| 29) 4294967296) 100) (< (mod (+ |c_id_#res| 21) 4294967296) 100) (< (mod (+ |c_id_#res| 28) 4294967296) 100) (< (mod (+ |c_id_#res| 27) 4294967296) 100) (< (mod (+ |c_id_#res| 30) 4294967296) 100) (< (mod (+ |c_id_#res| 13) 4294967296) 100) (< (mod (+ |c_id_#res| 10) 4294967296) 100)) is different from false [2020-07-21 01:09:24,456 WARN L193 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-21 01:10:27,160 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-21 01:11:27,389 WARN L193 SmtUtils]: Spent 9.55 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 01:12:23,695 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-21 01:13:20,490 WARN L193 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 143 DAG size of output: 13