/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/eca-rers2012/Problem10_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:54:37,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:54:37,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:54:37,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:54:37,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:54:37,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:54:37,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:54:37,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:54:37,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:54:37,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:54:37,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:54:37,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:54:37,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:54:37,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:54:37,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:54:37,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:54:37,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:54:37,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:54:37,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:54:37,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:54:37,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:54:37,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:54:37,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:54:37,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:54:37,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:54:37,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:54:37,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:54:37,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:54:37,561 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 13:54:37,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:54:37,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:54:37,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:54:37,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:54:37,581 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:54:37,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:54:37,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:54:37,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:54:37,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:54:37,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:54:37,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:54:37,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:54:37,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:54:37,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:54:37,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:54:37,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:54:37,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:54:37,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:54:37,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:54:37,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:54:37,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:54:37,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:54:37,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:54:37,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:54:37,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:54:37,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:54:37,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:37,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:54:37,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:54:37,586 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 13:54:37,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:54:37,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:54:37,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:54:37,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:54:37,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:54:37,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label44.c [2020-07-21 13:54:38,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7ffe349/1bd0a8f826834b4fa6c14360ae0fec3b/FLAGb5bedca1b [2020-07-21 13:54:38,643 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:54:38,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label44.c [2020-07-21 13:54:38,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7ffe349/1bd0a8f826834b4fa6c14360ae0fec3b/FLAGb5bedca1b [2020-07-21 13:54:38,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7ffe349/1bd0a8f826834b4fa6c14360ae0fec3b [2020-07-21 13:54:38,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:54:38,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:54:38,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:54:38,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:54:38,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:54:38,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:38" (1/1) ... [2020-07-21 13:54:38,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183121ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:38, skipping insertion in model container [2020-07-21 13:54:38,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:38" (1/1) ... [2020-07-21 13:54:38,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:54:39,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:54:39,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:54:39,482 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:54:39,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:54:39,734 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:54:39,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39 WrapperNode [2020-07-21 13:54:39,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:54:39,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:54:39,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:54:39,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:54:39,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... [2020-07-21 13:54:39,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:54:39,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:54:39,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:54:39,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:54:39,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:54:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:54:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:54:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 13:54:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:54:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 13:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:54:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:54:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:54:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:54:41,292 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:54:41,293 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 13:54:41,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:41 BoogieIcfgContainer [2020-07-21 13:54:41,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:54:41,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:54:41,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:54:41,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:54:41,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:54:38" (1/3) ... [2020-07-21 13:54:41,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2fddb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:41, skipping insertion in model container [2020-07-21 13:54:41,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:39" (2/3) ... [2020-07-21 13:54:41,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2fddb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:41, skipping insertion in model container [2020-07-21 13:54:41,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:41" (3/3) ... [2020-07-21 13:54:41,319 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label44.c [2020-07-21 13:54:41,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:54:41,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:54:41,362 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:54:41,404 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:54:41,405 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:54:41,405 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:54:41,406 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:54:41,406 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:54:41,406 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:54:41,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:54:41,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:54:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 13:54:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-21 13:54:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:41,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:54:41,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 745509942, now seen corresponding path program 1 times [2020-07-21 13:54:41,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:41,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147551491] [2020-07-21 13:54:41,485 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 13:54:41,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:54:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:41,734 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 13:54:41,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:54:41,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147551491] [2020-07-21 13:54:41,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:54:41,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:54:41,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044668469] [2020-07-21 13:54:41,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:54:41,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:41,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:54:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:54:41,763 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 13:54:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:54:42,896 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 13:54:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:54:42,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-07-21 13:54:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:54:42,935 INFO L225 Difference]: With dead ends: 571 [2020-07-21 13:54:42,935 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 13:54:42,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 13:54:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 13:54:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 13:54:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 13:54:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 13:54:43,060 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 63 [2020-07-21 13:54:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:54:43,061 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 13:54:43,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:54:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 13:54:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-21 13:54:43,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:43,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:54:43,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:43,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -825362990, now seen corresponding path program 1 times [2020-07-21 13:54:43,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:43,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391428980] [2020-07-21 13:54:43,291 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 13:54:43,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:54:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:54:43,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:54:43,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391428980] [2020-07-21 13:54:43,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:54:43,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:54:43,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240933709] [2020-07-21 13:54:43,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:54:43,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:54:43,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:54:43,457 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 3 states. [2020-07-21 13:54:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:54:44,145 INFO L93 Difference]: Finished difference Result 725 states and 1001 transitions. [2020-07-21 13:54:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:54:44,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-07-21 13:54:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:54:44,154 INFO L225 Difference]: With dead ends: 725 [2020-07-21 13:54:44,154 INFO L226 Difference]: Without dead ends: 437 [2020-07-21 13:54:44,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 13:54:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-07-21 13:54:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2020-07-21 13:54:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-07-21 13:54:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 568 transitions. [2020-07-21 13:54:44,206 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 568 transitions. Word has length 133 [2020-07-21 13:54:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:54:44,207 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 568 transitions. [2020-07-21 13:54:44,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:54:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 568 transitions. [2020-07-21 13:54:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 13:54:44,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:54:44,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:54:44,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:54:44,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:54:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:54:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1901765607, now seen corresponding path program 1 times [2020-07-21 13:54:44,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:54:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041684816] [2020-07-21 13:54:44,420 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 13:54:44,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:54:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:54:44,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:54:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:54:44,583 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:54:44,585 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:54:49,605 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:54:51,666 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 13:54:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:54:51,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:54:52,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:54:52,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:54:52,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041684816] [2020-07-21 13:54:52,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:54:52,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 13:54:52,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529602884] [2020-07-21 13:54:52,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:54:52,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:54:52,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:54:52,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2020-07-21 13:54:52,090 INFO L87 Difference]: Start difference. First operand 437 states and 568 transitions. Second operand 6 states. [2020-07-21 13:56:43,970 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-07-21 14:00:50,689 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 14:01:12,590 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 14:04:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:15,325 INFO L93 Difference]: Finished difference Result 1780 states and 2428 transitions. [2020-07-21 14:04:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 14:04:15,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2020-07-21 14:04:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:15,344 INFO L225 Difference]: With dead ends: 1780 [2020-07-21 14:04:15,344 INFO L226 Difference]: Without dead ends: 1349 [2020-07-21 14:04:15,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=58, Invalid=97, Unknown=1, NotChecked=0, Total=156 [2020-07-21 14:04:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2020-07-21 14:04:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1319. [2020-07-21 14:04:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-07-21 14:04:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1696 transitions. [2020-07-21 14:04:15,442 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1696 transitions. Word has length 142 [2020-07-21 14:04:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:15,443 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 1696 transitions. [2020-07-21 14:04:15,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:04:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1696 transitions. [2020-07-21 14:04:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-07-21 14:04:15,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:15,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:04:15,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:15,650 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1171294982, now seen corresponding path program 1 times [2020-07-21 14:04:15,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:15,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065246886] [2020-07-21 14:04:15,652 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 14:04:15,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:04:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:04:15,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:04:15,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065246886] [2020-07-21 14:04:15,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:04:15,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:04:15,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786061313] [2020-07-21 14:04:15,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:04:15,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:04:15,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:04:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:04:15,905 INFO L87 Difference]: Start difference. First operand 1319 states and 1696 transitions. Second operand 5 states. [2020-07-21 14:04:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:20,943 INFO L93 Difference]: Finished difference Result 3270 states and 4436 transitions. [2020-07-21 14:04:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:04:20,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2020-07-21 14:04:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:20,972 INFO L225 Difference]: With dead ends: 3270 [2020-07-21 14:04:20,972 INFO L226 Difference]: Without dead ends: 1957 [2020-07-21 14:04:20,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:04:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-07-21 14:04:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1917. [2020-07-21 14:04:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-07-21 14:04:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2476 transitions. [2020-07-21 14:04:21,071 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2476 transitions. Word has length 185 [2020-07-21 14:04:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:21,071 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2476 transitions. [2020-07-21 14:04:21,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:04:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2476 transitions. [2020-07-21 14:04:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-07-21 14:04:21,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:21,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:04:21,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:21,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 726002093, now seen corresponding path program 1 times [2020-07-21 14:04:21,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331227611] [2020-07-21 14:04:21,291 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 14:04:21,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:04:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:04:21,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:04:21,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331227611] [2020-07-21 14:04:21,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:04:21,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:04:21,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118000018] [2020-07-21 14:04:21,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:04:21,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:04:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:04:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:04:21,476 INFO L87 Difference]: Start difference. First operand 1917 states and 2476 transitions. Second operand 3 states. [2020-07-21 14:04:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:24,893 INFO L93 Difference]: Finished difference Result 3079 states and 4024 transitions. [2020-07-21 14:04:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:04:24,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2020-07-21 14:04:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:24,920 INFO L225 Difference]: With dead ends: 3079 [2020-07-21 14:04:24,920 INFO L226 Difference]: Without dead ends: 3077 [2020-07-21 14:04:24,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 198 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 14:04:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2020-07-21 14:04:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2356. [2020-07-21 14:04:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2356 states. [2020-07-21 14:04:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3114 transitions. [2020-07-21 14:04:25,002 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3114 transitions. Word has length 200 [2020-07-21 14:04:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:25,002 INFO L479 AbstractCegarLoop]: Abstraction has 2356 states and 3114 transitions. [2020-07-21 14:04:25,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:04:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3114 transitions. [2020-07-21 14:04:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-07-21 14:04:25,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:25,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:04:25,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:25,223 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:25,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1173404218, now seen corresponding path program 1 times [2020-07-21 14:04:25,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:25,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707322451] [2020-07-21 14:04:25,224 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 14:04:25,354 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:04:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:04:25,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:04:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:04:25,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707322451] [2020-07-21 14:04:25,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:04:25,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 14:04:25,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301458479] [2020-07-21 14:04:25,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:04:25,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:04:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:04:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:04:25,759 INFO L87 Difference]: Start difference. First operand 2356 states and 3114 transitions. Second operand 7 states. [2020-07-21 14:04:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:32,290 INFO L93 Difference]: Finished difference Result 5457 states and 7288 transitions. [2020-07-21 14:04:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 14:04:32,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2020-07-21 14:04:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:32,314 INFO L225 Difference]: With dead ends: 5457 [2020-07-21 14:04:32,314 INFO L226 Difference]: Without dead ends: 3107 [2020-07-21 14:04:32,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:04:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-07-21 14:04:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3097. [2020-07-21 14:04:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2020-07-21 14:04:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3810 transitions. [2020-07-21 14:04:32,393 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3810 transitions. Word has length 215 [2020-07-21 14:04:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:32,394 INFO L479 AbstractCegarLoop]: Abstraction has 3097 states and 3810 transitions. [2020-07-21 14:04:32,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:04:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3810 transitions. [2020-07-21 14:04:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-07-21 14:04:32,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:32,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:04:32,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:32,616 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1724488413, now seen corresponding path program 1 times [2020-07-21 14:04:32,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:32,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884989090] [2020-07-21 14:04:32,620 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 14:04:32,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:04:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-21 14:04:32,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:04:32,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884989090] [2020-07-21 14:04:32,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:04:32,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:04:32,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717040713] [2020-07-21 14:04:32,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:04:32,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:04:32,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:04:32,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:04:32,845 INFO L87 Difference]: Start difference. First operand 3097 states and 3810 transitions. Second operand 3 states. [2020-07-21 14:04:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:04:36,148 INFO L93 Difference]: Finished difference Result 7048 states and 8655 transitions. [2020-07-21 14:04:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:04:36,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-07-21 14:04:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:04:36,166 INFO L225 Difference]: With dead ends: 7048 [2020-07-21 14:04:36,166 INFO L226 Difference]: Without dead ends: 2944 [2020-07-21 14:04:36,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 230 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 14:04:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2020-07-21 14:04:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2944. [2020-07-21 14:04:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2944 states. [2020-07-21 14:04:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3572 transitions. [2020-07-21 14:04:36,238 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3572 transitions. Word has length 232 [2020-07-21 14:04:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:04:36,239 INFO L479 AbstractCegarLoop]: Abstraction has 2944 states and 3572 transitions. [2020-07-21 14:04:36,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:04:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3572 transitions. [2020-07-21 14:04:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 14:04:36,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:04:36,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:04:36,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:04:36,452 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:04:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:04:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1481429953, now seen corresponding path program 1 times [2020-07-21 14:04:36,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:04:36,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648632042] [2020-07-21 14:04:36,453 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 14:04:36,626 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:04:36,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:04:36,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 14:04:36,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:04:36,680 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:36,681 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:04:54,958 WARN L193 SmtUtils]: Spent 18.22 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 14:04:55,032 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:57,249 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-07-21 14:04:57,343 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 3, 1] term [2020-07-21 14:04:57,344 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:57,347 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 14:04:57,515 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:57,517 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:04:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 328 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-21 14:04:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:04:57,820 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2020-07-21 14:04:58,218 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 14:04:58,341 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 14:04:58,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:04:58,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:58,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:58,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:04:58,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:58,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:04:59,026 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-07-21 14:04:59,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:59,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:59,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:04:59,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:05:03,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648632042] [2020-07-21 14:05:03,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:05:03,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 14:05:03,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592419933] [2020-07-21 14:05:03,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:05:03,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:05:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:05:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2020-07-21 14:05:03,414 INFO L87 Difference]: Start difference. First operand 2944 states and 3572 transitions. Second operand 8 states. [2020-07-21 14:05:37,483 WARN L193 SmtUtils]: Spent 30.43 s on a formula simplification. DAG size of input: 50 DAG size of output: 44