/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:13:02,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:13:02,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:13:02,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:13:02,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:13:02,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:13:02,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:13:02,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:13:02,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:13:02,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:13:02,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:13:02,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:13:02,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:13:02,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:13:02,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:13:02,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:13:02,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:13:02,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:13:02,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:13:02,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:13:02,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:13:02,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:13:02,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:13:02,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:13:02,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:13:02,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:13:02,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:13:02,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:13:02,475 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 [2020-07-20 22:13:02,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:13:02,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:13:02,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:13:02,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:13:02,504 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:13:02,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:13:02,505 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:13:02,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:13:02,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:13:02,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:13:02,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:13:02,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:13:02,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:13:02,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:13:02,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:13:02,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:13:02,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:13:02,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:13:02,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:13:02,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:13:02,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:13:02,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:13:02,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:13:02,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:13:02,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:13:02,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:13:02,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:02,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:13:02,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:13:02,511 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:13:02,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:13:02,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:13:02,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:13:02,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:13:02,876 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:13:02,877 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 22:13:02,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d0917ab/df6c0db073324c9ca458b8f4e7d4425f/FLAG646509c95 [2020-07-20 22:13:03,473 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:13:03,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 22:13:03,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d0917ab/df6c0db073324c9ca458b8f4e7d4425f/FLAG646509c95 [2020-07-20 22:13:03,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d0917ab/df6c0db073324c9ca458b8f4e7d4425f [2020-07-20 22:13:03,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:13:03,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:13:03,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:03,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:13:03,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:13:03,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:03" (1/1) ... [2020-07-20 22:13:03,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dff1916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:03, skipping insertion in model container [2020-07-20 22:13:03,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:13:03" (1/1) ... [2020-07-20 22:13:03,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:13:03,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:13:04,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:04,105 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:13:04,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:13:04,250 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:13:04,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04 WrapperNode [2020-07-20 22:13:04,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:13:04,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:13:04,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:13:04,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:13:04,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (1/1) ... [2020-07-20 22:13:04,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:13:04,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:13:04,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:13:04,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:13:04,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (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 [2020-07-20 22:13:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:13:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:13:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:13:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:13:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:13:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:13:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:13:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:13:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:13:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:13:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:13:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:13:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:13:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:13:04,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:13:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:13:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:13:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:13:04,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:13:04,747 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 22:13:04,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:04 BoogieIcfgContainer [2020-07-20 22:13:04,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:13:04,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:13:04,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:13:04,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:13:04,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:13:03" (1/3) ... [2020-07-20 22:13:04,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57280409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:04, skipping insertion in model container [2020-07-20 22:13:04,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:13:04" (2/3) ... [2020-07-20 22:13:04,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57280409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:13:04, skipping insertion in model container [2020-07-20 22:13:04,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:13:04" (3/3) ... [2020-07-20 22:13:04,762 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-07-20 22:13:04,773 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:13:04,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:13:04,813 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:13:04,837 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:13:04,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:13:04,837 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:13:04,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:13:04,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:13:04,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:13:04,838 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:13:04,838 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:13:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 22:13:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:13:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:04,869 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] [2020-07-20 22:13:04,870 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-20 22:13:04,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:04,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375205495] [2020-07-20 22:13:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:05,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:13:05,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:13:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:13:05,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:13:05,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375205495] [2020-07-20 22:13:05,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:13:05,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:13:05,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510935309] [2020-07-20 22:13:05,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:13:05,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:13:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:05,124 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-20 22:13:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:05,297 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2020-07-20 22:13:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:13:05,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 22:13:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:05,311 INFO L225 Difference]: With dead ends: 87 [2020-07-20 22:13:05,312 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 22:13:05,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:13:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 22:13:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-20 22:13:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 22:13:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 22:13:05,371 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-20 22:13:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:05,371 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 22:13:05,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:13:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 22:13:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 22:13:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:05,374 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] [2020-07-20 22:13:05,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:05,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-20 22:13:05,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:05,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603134673] [2020-07-20 22:13:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:05,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:13:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:13:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:13:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:13:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:13:05,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:13:05,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603134673] [2020-07-20 22:13:05,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:13:05,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:13:05,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614208961] [2020-07-20 22:13:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:13:05,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:13:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:13:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:13:05,703 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-20 22:13:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:13:05,786 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-20 22:13:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:13:05,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 22:13:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:13:05,789 INFO L225 Difference]: With dead ends: 72 [2020-07-20 22:13:05,789 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 22:13:05,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:13:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 22:13:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-20 22:13:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 22:13:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 22:13:05,802 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-20 22:13:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:13:05,803 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 22:13:05,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:13:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 22:13:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 22:13:05,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:13:05,805 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] [2020-07-20 22:13:06,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:13:06,020 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:13:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:13:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-20 22:13:06,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:13:06,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139254557] [2020-07-20 22:13:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in