/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/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:42:10,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:42:10,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:42:10,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:42:10,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:42:10,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:42:10,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:42:10,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:42:10,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:42:10,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:42:10,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:42:10,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:42:10,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:42:10,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:42:10,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:42:10,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:42:10,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:42:10,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:42:10,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:42:10,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:42:10,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:42:10,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:42:10,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:42:10,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:42:10,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:42:10,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:42:10,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:42:10,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:42:10,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:42:10,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:42:10,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:42:10,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:42:10,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:42:10,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:42:10,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:42:10,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:42:10,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:42:10,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:42:10,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:42:10,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:42:10,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:42:10,816 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 17:42:10,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:42:10,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:42:10,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:42:10,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:42:10,834 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:42:10,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:42:10,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:42:10,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:42:10,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:42:10,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:42:10,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:42:10,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:42:10,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:42:10,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:42:10,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:42:10,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:42:10,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:42:10,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:42:10,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:42:10,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:42:10,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:42:10,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:42:10,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:42:10,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:42:10,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:42:10,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:42:10,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:10,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:42:10,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:42:10,839 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 17:42:11,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:42:11,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:42:11,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:42:11,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:42:11,169 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:42:11,170 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-20 17:42:11,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fd6b9ab/4391094ab9934bc3859df5c6dc1ef16d/FLAGced049d32 [2020-07-20 17:42:11,724 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:42:11,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-20 17:42:11,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fd6b9ab/4391094ab9934bc3859df5c6dc1ef16d/FLAGced049d32 [2020-07-20 17:42:12,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fd6b9ab/4391094ab9934bc3859df5c6dc1ef16d [2020-07-20 17:42:12,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:42:12,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:42:12,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:12,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:42:12,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:42:12,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f41f43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12, skipping insertion in model container [2020-07-20 17:42:12,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:42:12,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:42:12,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:12,303 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:42:12,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:12,342 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:42:12,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12 WrapperNode [2020-07-20 17:42:12,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:12,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:42:12,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:42:12,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:42:12,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (1/1) ... [2020-07-20 17:42:12,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:42:12,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:42:12,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:42:12,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:42:12,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (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 17:42:12,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:42:12,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:42:12,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:42:12,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:42:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:42:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:42:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 17:42:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:42:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:42:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:42:12,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:42:12,723 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:42:12,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:12 BoogieIcfgContainer [2020-07-20 17:42:12,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:42:12,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:42:12,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:42:12,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:42:12,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:42:12" (1/3) ... [2020-07-20 17:42:12,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f21bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:12, skipping insertion in model container [2020-07-20 17:42:12,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:12" (2/3) ... [2020-07-20 17:42:12,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f21bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:12, skipping insertion in model container [2020-07-20 17:42:12,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:12" (3/3) ... [2020-07-20 17:42:12,737 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-20 17:42:12,748 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:42:12,756 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:42:12,771 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:42:12,797 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:42:12,797 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:42:12,798 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:42:12,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:42:12,798 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:42:12,798 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:42:12,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:42:12,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:42:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 17:42:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:42:12,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:12,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:12,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-20 17:42:12,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:12,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99618599] [2020-07-20 17:42:12,839 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 17:42:12,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:42:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:42:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:12,935 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 17:42:12,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:12,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99618599] [2020-07-20 17:42:12,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:12,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:42:12,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037768616] [2020-07-20 17:42:12,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:42:12,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:42:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:42:12,967 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 17:42:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:13,004 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-20 17:42:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:42:13,006 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 17:42:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:13,015 INFO L225 Difference]: With dead ends: 31 [2020-07-20 17:42:13,016 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 17:42:13,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 17:42:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 17:42:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 17:42:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 17:42:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-20 17:42:13,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-20 17:42:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:13,072 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-20 17:42:13,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:42:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-20 17:42:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:42:13,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:13,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:13,290 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-07-20 17:42:13,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:13,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667594134] [2020-07-20 17:42:13,294 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 17:42:13,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:42:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:42:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:13,399 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 17:42:13,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:13,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667594134] [2020-07-20 17:42:13,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:13,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:42:13,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006590119] [2020-07-20 17:42:13,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:42:13,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:42:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:42:13,404 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-07-20 17:42:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:13,456 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-20 17:42:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:42:13,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 17:42:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:13,458 INFO L225 Difference]: With dead ends: 23 [2020-07-20 17:42:13,458 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 17:42:13,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:42:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 17:42:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 17:42:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 17:42:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-20 17:42:13,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-20 17:42:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:13,465 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-20 17:42:13,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:42:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-20 17:42:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:42:13,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:13,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:13,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:13,682 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-20 17:42:13,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:13,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556084321] [2020-07-20 17:42:13,685 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 17:42:13,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:13,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 17:42:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:13,853 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:42:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:13,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:42:13,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:42:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:14,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556084321] [2020-07-20 17:42:14,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:42:14,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 17:42:14,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403286175] [2020-07-20 17:42:14,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 17:42:14,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 17:42:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:42:14,125 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2020-07-20 17:42:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:14,445 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 17:42:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 17:42:14,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-07-20 17:42:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:14,447 INFO L225 Difference]: With dead ends: 39 [2020-07-20 17:42:14,447 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:42:14,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-07-20 17:42:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:42:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-07-20 17:42:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:42:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 17:42:14,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-20 17:42:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:14,456 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 17:42:14,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 17:42:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 17:42:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:42:14,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:14,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:14,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:14,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-20 17:42:14,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:14,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550477324] [2020-07-20 17:42:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:14,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:42:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:42:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:42:14,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:14,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550477324] [2020-07-20 17:42:14,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:14,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:42:14,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245810768] [2020-07-20 17:42:14,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:42:14,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:14,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:42:14,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:42:14,734 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-20 17:42:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:14,769 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-20 17:42:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:42:14,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 17:42:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:14,772 INFO L225 Difference]: With dead ends: 36 [2020-07-20 17:42:14,772 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 17:42:14,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 17:42:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 17:42:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 17:42:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 17:42:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-20 17:42:14,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-20 17:42:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:14,790 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-20 17:42:14,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:42:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-20 17:42:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:42:14,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:14,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:15,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:15,008 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-20 17:42:15,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:15,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52855539] [2020-07-20 17:42:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-20 17:42:15,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:42:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:42:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:15,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:42:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:15,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52855539] [2020-07-20 17:42:15,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:42:15,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 17:42:15,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079648483] [2020-07-20 17:42:15,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:42:15,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:42:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:42:15,145 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-20 17:42:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:15,187 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-20 17:42:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:42:15,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-20 17:42:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:15,189 INFO L225 Difference]: With dead ends: 36 [2020-07-20 17:42:15,189 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 17:42:15,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:42:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 17:42:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-07-20 17:42:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 17:42:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 17:42:15,195 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-07-20 17:42:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:15,195 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 17:42:15,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:42:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 17:42:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:42:15,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:15,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:15,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:15,409 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-20 17:42:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:15,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142904851] [2020-07-20 17:42:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:15,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 17:42:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:15,582 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:42:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:42:15,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:42:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:16,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142904851] [2020-07-20 17:42:16,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:42:16,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 17:42:16,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568441211] [2020-07-20 17:42:16,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 17:42:16,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:16,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 17:42:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:42:16,009 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 22 states. [2020-07-20 17:42:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:16,936 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-20 17:42:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 17:42:16,937 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-07-20 17:42:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:16,940 INFO L225 Difference]: With dead ends: 44 [2020-07-20 17:42:16,941 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 17:42:16,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 17:42:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 17:42:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-20 17:42:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:42:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-20 17:42:16,961 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-20 17:42:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:16,962 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-20 17:42:16,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 17:42:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-20 17:42:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:42:16,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:16,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:17,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:17,181 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 3 times [2020-07-20 17:42:17,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:17,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569200973] [2020-07-20 17:42:17,184 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 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 [2020-07-20 17:42:17,214 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:42:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:42:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:17,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:42:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:17,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569200973] [2020-07-20 17:42:17,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:42:17,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-20 17:42:17,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104486399] [2020-07-20 17:42:17,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 17:42:17,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 17:42:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:42:17,403 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-20 17:42:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:17,485 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-20 17:42:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:42:17,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-20 17:42:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:17,490 INFO L225 Difference]: With dead ends: 46 [2020-07-20 17:42:17,490 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 17:42:17,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:42:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 17:42:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-20 17:42:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:42:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-20 17:42:17,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2020-07-20 17:42:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:17,499 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-20 17:42:17,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 17:42:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-20 17:42:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 17:42:17,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:17,500 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:17,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:17,709 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:17,710 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 4 times [2020-07-20 17:42:17,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:17,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212195244] [2020-07-20 17:42:17,712 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 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 [2020-07-20 17:42:17,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:17,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:42:17,754 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:42:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:42:17,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:42:17,798 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:42:17,802 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:42:18,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:18,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:42:18 BoogieIcfgContainer [2020-07-20 17:42:18,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:42:18,049 INFO L168 Benchmark]: Toolchain (without parser) took 5974.70 ms. Allocated memory was 135.3 MB in the beginning and 254.8 MB in the end (delta: 119.5 MB). Free memory was 100.9 MB in the beginning and 221.8 MB in the end (delta: -120.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:42:18,050 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 17:42:18,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.40 ms. Allocated memory is still 135.3 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:18,052 INFO L168 Benchmark]: Boogie Preprocessor took 114.60 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 90.8 MB in the beginning and 179.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:18,053 INFO L168 Benchmark]: RCFGBuilder took 265.48 ms. Allocated memory is still 199.8 MB. Free memory was 178.4 MB in the beginning and 166.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:18,054 INFO L168 Benchmark]: TraceAbstraction took 5317.80 ms. Allocated memory was 199.8 MB in the beginning and 254.8 MB in the end (delta: 55.1 MB). Free memory was 165.4 MB in the beginning and 221.8 MB in the end (delta: -56.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:42:18,058 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.40 ms. Allocated memory is still 135.3 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.60 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 90.8 MB in the beginning and 179.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 265.48 ms. Allocated memory is still 199.8 MB. Free memory was 178.4 MB in the beginning and 166.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5317.80 ms. Allocated memory was 199.8 MB in the beginning and 254.8 MB in the end (delta: 55.1 MB). Free memory was 165.4 MB in the beginning and 221.8 MB in the end (delta: -56.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i