/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:17:00,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:17:00,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:17:00,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 14:17:00,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:17:00,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:17:00,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:17:00,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:17:00,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:17:00,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:17:00,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:17:00,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:17:00,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:17:00,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:17:00,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:17:00,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:17:00,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:17:00,941 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 14:17:00,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:17:00,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:17:00,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:17:00,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:17:00,957 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:17:00,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:17:00,958 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:17:00,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:17:00,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:17:00,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:17:00,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:17:00,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:17:00,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:17:00,959 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:17:00,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:17:00,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:17:00,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:17:00,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:17:00,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:17:00,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:17:00,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:17:00,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:17:00,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:17:00,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:17:00,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:17:00,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:17:00,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:00,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:17:00,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:17:00,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:17:01,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:17:01,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:17:01,265 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:17:01,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:17:01,267 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:17:01,268 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-21 14:17:01,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab193a7d/393e9b8a7ed740d8a9d5f2cbab3b1483/FLAGe06fc0c0a [2020-07-21 14:17:01,772 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:17:01,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-21 14:17:01,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab193a7d/393e9b8a7ed740d8a9d5f2cbab3b1483/FLAGe06fc0c0a [2020-07-21 14:17:02,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab193a7d/393e9b8a7ed740d8a9d5f2cbab3b1483 [2020-07-21 14:17:02,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:17:02,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:17:02,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:02,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:17:02,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:17:02,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d1e207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02, skipping insertion in model container [2020-07-21 14:17:02,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:17:02,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:17:02,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:02,431 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:17:02,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:02,463 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:17:02,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02 WrapperNode [2020-07-21 14:17:02,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:02,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:17:02,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:17:02,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:17:02,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (1/1) ... [2020-07-21 14:17:02,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:17:02,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:17:02,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:17:02,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:17:02,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (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 14:17:02,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:17:02,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:17:02,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:17:02,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:17:02,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:17:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:17:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:17:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:17:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:17:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:17:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:17:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:17:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:17:02,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:17:02,814 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:17:02,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:02 BoogieIcfgContainer [2020-07-21 14:17:02,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:17:02,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:17:02,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:17:02,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:17:02,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:17:02" (1/3) ... [2020-07-21 14:17:02,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34652f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:02, skipping insertion in model container [2020-07-21 14:17:02,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:02" (2/3) ... [2020-07-21 14:17:02,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34652f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:02, skipping insertion in model container [2020-07-21 14:17:02,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:02" (3/3) ... [2020-07-21 14:17:02,830 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-07-21 14:17:02,854 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:17:02,875 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:17:02,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:17:02,953 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:17:02,953 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:17:02,953 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:17:02,953 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:17:02,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:17:02,954 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:17:02,954 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:17:02,954 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:17:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 14:17:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:17:02,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:02,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:02,983 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-07-21 14:17:02,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:02,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949743066] [2020-07-21 14:17:02,998 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 14:17:03,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:03,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:17:03,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:03,115 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 14:17:03,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:17:03,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949743066] [2020-07-21 14:17:03,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:17:03,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:17:03,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666977428] [2020-07-21 14:17:03,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:17:03,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:17:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:17:03,142 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-21 14:17:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:03,183 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 14:17:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:17:03,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 14:17:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:03,204 INFO L225 Difference]: With dead ends: 33 [2020-07-21 14:17:03,204 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 14:17:03,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:17:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 14:17:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-21 14:17:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 14:17:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 14:17:03,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-21 14:17:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:03,260 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 14:17:03,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:17:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 14:17:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:17:03,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:03,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:03,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:03,478 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-07-21 14:17:03,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:03,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411798673] [2020-07-21 14:17:03,481 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 14:17:03,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:17:03,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411798673] [2020-07-21 14:17:03,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:03,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 14:17:03,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726851816] [2020-07-21 14:17:03,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:17:03,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:17:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:17:03,601 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-07-21 14:17:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:03,642 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-21 14:17:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:17:03,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-21 14:17:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:03,644 INFO L225 Difference]: With dead ends: 24 [2020-07-21 14:17:03,644 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 14:17:03,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:17:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 14:17:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 14:17:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 14:17:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 14:17:03,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2020-07-21 14:17:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:03,652 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 14:17:03,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:17:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 14:17:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 14:17:03,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:03,654 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:03,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:03,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1338939477, now seen corresponding path program 2 times [2020-07-21 14:17:03,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:03,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684892788] [2020-07-21 14:17:03,869 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 14:17:03,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:17:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:03,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:04,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684892788] [2020-07-21 14:17:04,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:04,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 14:17:04,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312886374] [2020-07-21 14:17:04,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:17:04,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:17:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:17:04,112 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2020-07-21 14:17:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:04,200 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-21 14:17:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:17:04,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-07-21 14:17:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:04,202 INFO L225 Difference]: With dead ends: 36 [2020-07-21 14:17:04,202 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 14:17:04,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:17:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 14:17:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 14:17:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 14:17:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-07-21 14:17:04,211 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2020-07-21 14:17:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:04,212 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-07-21 14:17:04,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:17:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-21 14:17:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 14:17:04,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:04,214 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:04,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:04,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1154594463, now seen corresponding path program 3 times [2020-07-21 14:17:04,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:04,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035096510] [2020-07-21 14:17:04,432 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 14:17:04,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 14:17:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:04,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:04,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035096510] [2020-07-21 14:17:04,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:04,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 14:17:04,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969901946] [2020-07-21 14:17:04,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 14:17:04,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 14:17:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 14:17:04,941 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 24 states. [2020-07-21 14:17:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:05,053 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-07-21 14:17:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 14:17:05,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-07-21 14:17:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:05,055 INFO L225 Difference]: With dead ends: 60 [2020-07-21 14:17:05,055 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 14:17:05,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 14:17:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 14:17:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 14:17:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 14:17:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-07-21 14:17:05,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2020-07-21 14:17:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:05,066 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-07-21 14:17:05,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 14:17:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-07-21 14:17:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 14:17:05,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:05,069 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:05,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:05,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1804670329, now seen corresponding path program 4 times [2020-07-21 14:17:05,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:05,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817776787] [2020-07-21 14:17:05,286 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 14:17:05,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 14:17:05,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:05,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:06,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817776787] [2020-07-21 14:17:06,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:06,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 14:17:06,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398603304] [2020-07-21 14:17:06,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 14:17:06,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 14:17:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 14:17:06,754 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 48 states. [2020-07-21 14:17:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:06,985 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-07-21 14:17:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 14:17:06,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 54 [2020-07-21 14:17:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:06,989 INFO L225 Difference]: With dead ends: 108 [2020-07-21 14:17:06,989 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 14:17:06,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 14:17:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 14:17:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 14:17:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 14:17:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-07-21 14:17:07,018 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2020-07-21 14:17:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:07,022 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-07-21 14:17:07,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 14:17:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-07-21 14:17:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-21 14:17:07,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:07,028 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:07,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:07,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1210559063, now seen corresponding path program 5 times [2020-07-21 14:17:07,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:07,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272700706] [2020-07-21 14:17:07,232 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 [2020-07-21 14:17:07,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 14:17:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:08,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:12,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272700706] [2020-07-21 14:17:12,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:12,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 14:17:12,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438976960] [2020-07-21 14:17:12,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 14:17:12,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:12,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 14:17:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 14:17:12,371 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 96 states. [2020-07-21 14:17:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:12,847 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2020-07-21 14:17:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 14:17:12,848 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 102 [2020-07-21 14:17:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:12,851 INFO L225 Difference]: With dead ends: 204 [2020-07-21 14:17:12,851 INFO L226 Difference]: Without dead ends: 199 [2020-07-21 14:17:12,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 14:17:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-21 14:17:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-07-21 14:17:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 14:17:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2020-07-21 14:17:12,874 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 102 [2020-07-21 14:17:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:12,875 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2020-07-21 14:17:12,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 14:17:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2020-07-21 14:17:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-07-21 14:17:12,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:12,878 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:13,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:13,089 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2113047031, now seen corresponding path program 6 times [2020-07-21 14:17:13,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:13,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078514149] [2020-07-21 14:17:13,092 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:13,172 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 14:17:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:17:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:32,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078514149] [2020-07-21 14:17:32,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:17:32,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 192 [2020-07-21 14:17:32,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287873577] [2020-07-21 14:17:32,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2020-07-21 14:17:32,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:32,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2020-07-21 14:17:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-21 14:17:32,866 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 192 states. [2020-07-21 14:17:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:34,205 INFO L93 Difference]: Finished difference Result 396 states and 491 transitions. [2020-07-21 14:17:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2020-07-21 14:17:34,205 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 198 [2020-07-21 14:17:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:34,209 INFO L225 Difference]: With dead ends: 396 [2020-07-21 14:17:34,209 INFO L226 Difference]: Without dead ends: 391 [2020-07-21 14:17:34,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-21 14:17:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-07-21 14:17:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2020-07-21 14:17:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-07-21 14:17:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2020-07-21 14:17:34,256 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 198 [2020-07-21 14:17:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:34,257 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2020-07-21 14:17:34,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 192 states. [2020-07-21 14:17:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2020-07-21 14:17:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-21 14:17:34,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:34,264 INFO L422 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:34,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:34,479 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1173211447, now seen corresponding path program 7 times [2020-07-21 14:17:34,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:34,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358914142] [2020-07-21 14:17:34,481 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:34,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-21 14:17:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:17:54,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:19:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:19:01,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358914142] [2020-07-21 14:19:01,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:19:01,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 384 [2020-07-21 14:19:01,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717700000] [2020-07-21 14:19:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 384 states [2020-07-21 14:19:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:19:01,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2020-07-21 14:19:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-21 14:19:01,684 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 384 states. [2020-07-21 14:19:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:19:08,619 INFO L93 Difference]: Finished difference Result 780 states and 971 transitions. [2020-07-21 14:19:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2020-07-21 14:19:08,621 INFO L78 Accepts]: Start accepts. Automaton has 384 states. Word has length 390 [2020-07-21 14:19:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:19:08,627 INFO L225 Difference]: With dead ends: 780 [2020-07-21 14:19:08,628 INFO L226 Difference]: Without dead ends: 775 [2020-07-21 14:19:08,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-21 14:19:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-07-21 14:19:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-07-21 14:19:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-07-21 14:19:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 775 transitions. [2020-07-21 14:19:08,667 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 775 transitions. Word has length 390 [2020-07-21 14:19:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:19:08,669 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 775 transitions. [2020-07-21 14:19:08,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 384 states. [2020-07-21 14:19:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 775 transitions. [2020-07-21 14:19:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-07-21 14:19:08,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:19:08,695 INFO L422 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:19:08,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:19:08,911 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:19:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:19:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1601849271, now seen corresponding path program 8 times [2020-07-21 14:19:08,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:19:08,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471398614] [2020-07-21 14:19:08,914 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:19:09,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:19:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:19:09,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 384 conjunts are in the unsatisfiable core [2020-07-21 14:19:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:20:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:20:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:29:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:29:56,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471398614] [2020-07-21 14:29:56,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:29:56,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385] total 768 [2020-07-21 14:29:56,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17847634] [2020-07-21 14:29:56,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 768 states [2020-07-21 14:29:56,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:29:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2020-07-21 14:29:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294528, Invalid=294528, Unknown=0, NotChecked=0, Total=589056 [2020-07-21 14:29:56,757 INFO L87 Difference]: Start difference. First operand 775 states and 775 transitions. Second operand 768 states.