/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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 17:36:54,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:54,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:54,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:36:54,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:36:54,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:36:54,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:36:54,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:36:54,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:36:54,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:36:54,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:36:54,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:36:54,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:54,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:54,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:54,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:54,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:54,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:54,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:54,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:54,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:54,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:54,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:54,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:54,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:54,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:54,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:54,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:54,881 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 17:36:54,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:54,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:54,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:54,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:54,904 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:54,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:54,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:54,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:54,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:54,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:54,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:54,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:54,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:54,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:54,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:54,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:54,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:54,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:54,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:54,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:54,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:54,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:54,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:54,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:54,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:54,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:54,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:54,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:54,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:54,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:36:55,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:55,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:55,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:55,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:55,244 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:55,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 17:36:55,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1a41c7b/1acff4f743824210a821980eee6d72ab/FLAG411073d62 [2020-07-20 17:36:55,836 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:55,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 17:36:55,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1a41c7b/1acff4f743824210a821980eee6d72ab/FLAG411073d62 [2020-07-20 17:36:56,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1a41c7b/1acff4f743824210a821980eee6d72ab [2020-07-20 17:36:56,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:56,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:56,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:56,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:56,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:56,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a56772f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56, skipping insertion in model container [2020-07-20 17:36:56,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:56,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:56,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:56,480 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:56,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:56,537 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:56,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56 WrapperNode [2020-07-20 17:36:56,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:56,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:56,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:56,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:56,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (1/1) ... [2020-07-20 17:36:56,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:56,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:56,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:56,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:56,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (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 17:36:56,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:56,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:36:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:36:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:36:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:36:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:36:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:36:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:36:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:57,082 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:57,082 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 17:36:57,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:57 BoogieIcfgContainer [2020-07-20 17:36:57,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:57,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:57,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:57,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:57,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:56" (1/3) ... [2020-07-20 17:36:57,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b8c5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:57, skipping insertion in model container [2020-07-20 17:36:57,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:56" (2/3) ... [2020-07-20 17:36:57,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b8c5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:57, skipping insertion in model container [2020-07-20 17:36:57,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:57" (3/3) ... [2020-07-20 17:36:57,105 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-07-20 17:36:57,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:57,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:57,170 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:57,195 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:57,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:57,195 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:57,195 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:57,196 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:57,196 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:57,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:57,196 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 17:36:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:36:57,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:57,222 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 17:36:57,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-20 17:36:57,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:57,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471275394] [2020-07-20 17:36:57,235 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 17:36:57,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:57,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:36:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:57,381 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 17:36:57,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:57,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471275394] [2020-07-20 17:36:57,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:57,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:36:57,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560327990] [2020-07-20 17:36:57,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:36:57,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:36:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:57,409 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-20 17:36:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:57,439 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-07-20 17:36:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:36:57,440 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-20 17:36:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:57,450 INFO L225 Difference]: With dead ends: 70 [2020-07-20 17:36:57,451 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 17:36:57,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 17:36:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 17:36:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 17:36:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-20 17:36:57,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-07-20 17:36:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:57,498 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-20 17:36:57,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:36:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-20 17:36:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:36:57,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:57,500 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 17:36:57,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:57,707 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:57,708 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-07-20 17:36:57,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:57,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321407156] [2020-07-20 17:36:57,709 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 17:36:57,783 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:57,838 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 17:36:57,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:57,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321407156] [2020-07-20 17:36:57,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:57,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:57,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554007497] [2020-07-20 17:36:57,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:57,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:57,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:57,846 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-07-20 17:36:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:57,968 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-07-20 17:36:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:57,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 17:36:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:57,972 INFO L225 Difference]: With dead ends: 67 [2020-07-20 17:36:57,972 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:36:57,973 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 17:36:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:36:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-20 17:36:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:36:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 17:36:57,988 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-20 17:36:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:57,988 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 17:36:57,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 17:36:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:36:57,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:57,990 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 17:36:58,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:58,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-20 17:36:58,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:58,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548089034] [2020-07-20 17:36:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:58,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:36:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:36:58,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:36:58,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548089034] [2020-07-20 17:36:58,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:58,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-20 17:36:58,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461841713] [2020-07-20 17:36:58,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:36:58,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:36:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:36:58,594 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 13 states. [2020-07-20 17:36:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:58,992 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2020-07-20 17:36:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:36:58,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-07-20 17:36:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:58,995 INFO L225 Difference]: With dead ends: 114 [2020-07-20 17:36:58,995 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 17:36:58,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:36:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 17:36:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-07-20 17:36:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 17:36:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-07-20 17:36:59,009 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 33 [2020-07-20 17:36:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:59,010 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-07-20 17:36:59,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:36:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-07-20 17:36:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:36:59,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:59,012 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 17:36:59,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:59,226 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-20 17:36:59,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:59,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977695076] [2020-07-20 17:36:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in