/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:16:12,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:16:12,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:16:12,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:16:12,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:16:12,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:16:12,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:16:12,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:16:12,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:16:12,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:16:12,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:16:12,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:16:12,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:16:12,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:16:12,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:16:12,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:16:12,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:16:12,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:16:12,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:16:12,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:16:12,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:16:12,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:16:12,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:16:12,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:16:12,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:16:12,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:16:12,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:16:12,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:16:12,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:16:12,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:16:12,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:16:12,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:16:12,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:16:12,138 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:16:12,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:16:12,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:16:12,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:16:12,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:16:12,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:16:12,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:16:12,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:16:12,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:16:12,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:16:12,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:16:12,140 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:16:12,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:16:12,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:16:12,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:16:12,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:16:12,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:16:12,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:12,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:16:12,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:16:12,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:16:12,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:16:12,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:12,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:16:12,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:16:12,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:16:12,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:16:12,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:16:12,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:16:12,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:16:12,464 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:16:12,465 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-20 22:16:12,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23cab590/17d3fe43f6234fff87f2c6516f51091a/FLAG8bc94fec4 [2020-07-20 22:16:12,947 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:16:12,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-20 22:16:12,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23cab590/17d3fe43f6234fff87f2c6516f51091a/FLAG8bc94fec4 [2020-07-20 22:16:13,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23cab590/17d3fe43f6234fff87f2c6516f51091a [2020-07-20 22:16:13,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:16:13,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:16:13,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:13,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:16:13,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:16:13,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d82745c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13, skipping insertion in model container [2020-07-20 22:16:13,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:16:13,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:16:13,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:13,616 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:16:13,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:13,656 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:16:13,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13 WrapperNode [2020-07-20 22:16:13,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:13,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:16:13,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:16:13,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:16:13,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... [2020-07-20 22:16:13,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:16:13,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:16:13,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:16:13,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:16:13,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:16:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:16:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:16:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:16:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 22:16:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:16:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:16:14,229 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:16:14,230 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-20 22:16:14,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:14 BoogieIcfgContainer [2020-07-20 22:16:14,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:16:14,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:16:14,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:16:14,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:16:14,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:16:13" (1/3) ... [2020-07-20 22:16:14,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f1b0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:14, skipping insertion in model container [2020-07-20 22:16:14,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:13" (2/3) ... [2020-07-20 22:16:14,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f1b0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:14, skipping insertion in model container [2020-07-20 22:16:14,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:14" (3/3) ... [2020-07-20 22:16:14,241 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-20 22:16:14,251 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:16:14,257 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:16:14,270 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:16:14,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:16:14,293 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:16:14,293 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:16:14,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:16:14,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:16:14,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:16:14,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:16:14,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:16:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 22:16:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:16:14,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:14,317 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] [2020-07-20 22:16:14,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-20 22:16:14,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:14,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458218973] [2020-07-20 22:16:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:14,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:14,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:16:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:14,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:14,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458218973] [2020-07-20 22:16:14,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:14,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:16:14,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758210768] [2020-07-20 22:16:14,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:16:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:16:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:16:14,502 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 22:16:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:14,591 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-20 22:16:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:16:14,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 22:16:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:14,601 INFO L225 Difference]: With dead ends: 73 [2020-07-20 22:16:14,601 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 22:16:14,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:16:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 22:16:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-20 22:16:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 22:16:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 22:16:14,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-20 22:16:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:14,645 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 22:16:14,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:16:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 22:16:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:16:14,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:14,647 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] [2020-07-20 22:16:14,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:14,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-20 22:16:14,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:14,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167779550] [2020-07-20 22:16:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:14,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:14,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:16:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:16:14,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:16:15,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167779550] [2020-07-20 22:16:15,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:15,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:16:15,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36679000] [2020-07-20 22:16:15,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:16:15,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:16:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:15,018 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-20 22:16:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:15,176 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-07-20 22:16:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:16:15,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 22:16:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:15,180 INFO L225 Difference]: With dead ends: 79 [2020-07-20 22:16:15,180 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 22:16:15,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 22:16:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-07-20 22:16:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 22:16:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 22:16:15,201 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-07-20 22:16:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:15,201 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 22:16:15,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:16:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 22:16:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 22:16:15,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:15,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:15,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:15,418 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 2 times [2020-07-20 22:16:15,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:15,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520487276] [2020-07-20 22:16:15,421 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 22:16:15,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:16:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:16:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 22:16:15,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520487276] [2020-07-20 22:16:15,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:15,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 22:16:15,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920830741] [2020-07-20 22:16:15,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:16:15,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:16:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:16:15,645 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 7 states. [2020-07-20 22:16:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:15,751 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-20 22:16:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:16:15,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-20 22:16:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:15,753 INFO L225 Difference]: With dead ends: 93 [2020-07-20 22:16:15,753 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 22:16:15,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:16:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 22:16:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 22:16:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 22:16:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-20 22:16:15,762 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-20 22:16:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:15,763 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-20 22:16:15,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:16:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-20 22:16:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 22:16:15,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:15,765 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:15,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:15,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 3 times [2020-07-20 22:16:15,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:15,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132108160] [2020-07-20 22:16:15,974 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 22:16:16,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:16:16,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:16:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:16,134 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:16,137 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 22:16:16,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:16,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132108160] [2020-07-20 22:16:16,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:16,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 22:16:16,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230784589] [2020-07-20 22:16:16,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:16:16,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:16:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:16:16,164 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-07-20 22:16:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:16,219 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 22:16:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:16:16,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-20 22:16:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:16,221 INFO L225 Difference]: With dead ends: 62 [2020-07-20 22:16:16,221 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 22:16:16,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:16:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 22:16:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 22:16:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 22:16:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-20 22:16:16,228 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-20 22:16:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:16,229 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-20 22:16:16,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:16:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-20 22:16:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 22:16:16,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:16,230 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:16,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:16,444 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-20 22:16:16,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:16,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395248673] [2020-07-20 22:16:16,447 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:16,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:16:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:16:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:16,699 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:16,701 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 22:16:16,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:16,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395248673] [2020-07-20 22:16:16,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:16,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 22:16:16,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231716250] [2020-07-20 22:16:16,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:16:16,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:16:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:16:16,733 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-20 22:16:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:16,820 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-20 22:16:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:16:16,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-20 22:16:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:16,822 INFO L225 Difference]: With dead ends: 56 [2020-07-20 22:16:16,822 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 22:16:16,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:16:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 22:16:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 22:16:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 22:16:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-20 22:16:16,831 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-20 22:16:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:16,831 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-20 22:16:16,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:16:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-20 22:16:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 22:16:16,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:16,833 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:17,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:17,047 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-20 22:16:17,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:17,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883735150] [2020-07-20 22:16:17,048 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 22:16:17,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:17,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:16:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 22:16:17,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883735150] [2020-07-20 22:16:17,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:17,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:16:17,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352844383] [2020-07-20 22:16:17,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:16:17,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:16:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:16:17,223 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2020-07-20 22:16:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:17,244 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-20 22:16:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:16:17,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 22:16:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:17,246 INFO L225 Difference]: With dead ends: 67 [2020-07-20 22:16:17,246 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 22:16:17,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:16:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 22:16:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 22:16:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 22:16:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-20 22:16:17,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-20 22:16:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:17,254 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-20 22:16:17,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:16:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-20 22:16:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 22:16:17,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:17,256 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:17,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:17,472 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-20 22:16:17,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:17,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080431877] [2020-07-20 22:16:17,474 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 22:16:17,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:16:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:16:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:17,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:17,784 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:16:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 22:16:17,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:17,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:16:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 22:16:17,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080431877] [2020-07-20 22:16:17,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:16:17,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2020-07-20 22:16:17,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833858232] [2020-07-20 22:16:17,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:16:17,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:16:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:16:17,865 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 5 states. [2020-07-20 22:16:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:17,884 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-07-20 22:16:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:16:17,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-20 22:16:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:17,885 INFO L225 Difference]: With dead ends: 51 [2020-07-20 22:16:17,885 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:16:17,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:16:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:16:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:16:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:16:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:16:17,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-07-20 22:16:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:17,886 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:16:17,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:16:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:16:17,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:16:18,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:18,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:16:18,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:16:18,311 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:16:18,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:16:18,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:16:18,312 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:16:18,312 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:16:18,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:16:18,312 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:16:18,312 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:16:18,313 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:16:18,313 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:16:18,313 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= 0 main_~nc_B~0) (= 0 main_~found~0)) [2020-07-20 22:16:18,313 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-20 22:16:18,313 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-20 22:16:18,313 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 22:16:18,313 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-20 22:16:18,314 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-20 22:16:18,314 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 22:16:18,314 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (and (<= 1 main_~nc_B~0) (= 0 main_~found~0)) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2020-07-20 22:16:18,314 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 22:16:18,314 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 22:16:18,315 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= 1 main_~found~0))) (or (and (or .cse0 (= 0 main_~found~0)) (<= 1 main_~nc_B~0)) (and .cse0 (<= 0 main_~j~0)))) [2020-07-20 22:16:18,315 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-20 22:16:18,315 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-20 22:16:18,315 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-20 22:16:18,315 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: true [2020-07-20 22:16:18,315 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-20 22:16:18,315 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 22:16:18,316 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-20 22:16:18,316 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-20 22:16:18,316 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 22:16:18,316 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-20 22:16:18,316 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-20 22:16:18,316 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 22:16:18,316 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 22:16:18,317 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 22:16:18,317 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 22:16:18,317 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 22:16:18,317 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 22:16:18,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:16:18 BoogieIcfgContainer [2020-07-20 22:16:18,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:16:18,337 INFO L168 Benchmark]: Toolchain (without parser) took 4970.77 ms. Allocated memory was 138.9 MB in the beginning and 246.4 MB in the end (delta: 107.5 MB). Free memory was 103.3 MB in the beginning and 167.8 MB in the end (delta: -64.6 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,338 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.81 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,340 INFO L168 Benchmark]: Boogie Preprocessor took 129.43 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 179.2 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,341 INFO L168 Benchmark]: RCFGBuilder took 446.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 159.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,341 INFO L168 Benchmark]: TraceAbstraction took 4099.88 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 159.8 MB in the beginning and 167.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:18,345 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.81 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.43 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 179.2 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.14 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 159.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4099.88 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 159.8 MB in the beginning and 167.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 <= nc_B && 0 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 <= nc_B && 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 148 SDslu, 394 SDs, 0 SdLazy, 207 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 350 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 18 PreInvPairs, 42 NumberOfFragments, 55 HoareAnnotationTreeSize, 18 FomulaSimplifications, 280 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 278 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 23568 SizeOfPredicates, 19 NumberOfNonLiveVariables, 830 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 288/333 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...