/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:08:00,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:08:00,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:08:00,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:08:00,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:08:00,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:08:00,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:08:00,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:08:00,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:08:00,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:08:00,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:08:00,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:08:00,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:08:00,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:08:00,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:08:00,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:08:00,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:08:00,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:08:00,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:08:00,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:08:00,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:08:00,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:08:00,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:08:00,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:08:00,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:08:00,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:08:00,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:08:00,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:08:00,155 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 21:08:00,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:08:00,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:08:00,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:08:00,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:08:00,197 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:08:00,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:08:00,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:08:00,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:08:00,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:08:00,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:08:00,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:08:00,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:08:00,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:08:00,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:08:00,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:08:00,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:08:00,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:08:00,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:08:00,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:08:00,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:08:00,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:08:00,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:08:00,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:08:00,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:08:00,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:08:00,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:08:00,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:00,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:08:00,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:08:00,209 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 21:08:00,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:08:00,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:08:00,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:08:00,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:08:00,524 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:08:00,524 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 21:08:00,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9ecc10e/d7c8496dc7fe47ab8779758c9241e31d/FLAGd88a523e1 [2020-07-20 21:08:01,082 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:08:01,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 21:08:01,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9ecc10e/d7c8496dc7fe47ab8779758c9241e31d/FLAGd88a523e1 [2020-07-20 21:08:01,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9ecc10e/d7c8496dc7fe47ab8779758c9241e31d [2020-07-20 21:08:01,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:08:01,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:08:01,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:01,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:08:01,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:08:01,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2846fb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01, skipping insertion in model container [2020-07-20 21:08:01,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:08:01,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:08:01,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:01,749 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:08:01,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:08:01,893 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:08:01,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01 WrapperNode [2020-07-20 21:08:01,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:08:01,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:08:01,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:08:01,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:08:01,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (1/1) ... [2020-07-20 21:08:01,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:08:01,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:08:01,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:08:01,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:08:01,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (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 21:08:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:08:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:08:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 21:08:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 21:08:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 21:08:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 21:08:02,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:08:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:08:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 21:08:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 21:08:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:08:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:08:02,514 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:08:02,515 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 21:08:02,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02 BoogieIcfgContainer [2020-07-20 21:08:02,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:08:02,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:08:02,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:08:02,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:08:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:08:01" (1/3) ... [2020-07-20 21:08:02,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16954b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:08:01" (2/3) ... [2020-07-20 21:08:02,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16954b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:08:02, skipping insertion in model container [2020-07-20 21:08:02,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:08:02" (3/3) ... [2020-07-20 21:08:02,526 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-20 21:08:02,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:08:02,542 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:08:02,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:08:02,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:08:02,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:08:02,580 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:08:02,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:08:02,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:08:02,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:08:02,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:08:02,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:08:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 21:08:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 21:08:02,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:02,613 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:02,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 21:08:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:02,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512368273] [2020-07-20 21:08:02,628 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 21:08:02,759 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:02,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:08:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:02,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:02,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512368273] [2020-07-20 21:08:02,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:02,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:02,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271659651] [2020-07-20 21:08:02,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:02,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:02,873 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-20 21:08:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,017 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-20 21:08:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:08:03,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 21:08:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,033 INFO L225 Difference]: With dead ends: 126 [2020-07-20 21:08:03,034 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:08:03,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:08:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-20 21:08:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 21:08:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-20 21:08:03,097 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-20 21:08:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,097 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-20 21:08:03,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-20 21:08:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 21:08:03,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:03,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:03,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-20 21:08:03,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:03,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523586145] [2020-07-20 21:08:03,317 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 21:08:03,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:08:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:03,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:03,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523586145] [2020-07-20 21:08:03,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:03,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:03,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811197156] [2020-07-20 21:08:03,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:03,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:03,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:03,439 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-20 21:08:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,524 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-20 21:08:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:08:03,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-20 21:08:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,542 INFO L225 Difference]: With dead ends: 113 [2020-07-20 21:08:03,542 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:08:03,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:08:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-20 21:08:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 21:08:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-20 21:08:03,558 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-20 21:08:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:03,559 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-20 21:08:03,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-20 21:08:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:08:03,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:03,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:03,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:03,777 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-20 21:08:03,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:03,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209468033] [2020-07-20 21:08:03,778 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 21:08:03,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:08:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:03,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:03,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209468033] [2020-07-20 21:08:03,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:03,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:03,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100945341] [2020-07-20 21:08:03,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:03,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:03,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:03,880 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-20 21:08:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:03,979 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-20 21:08:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:08:03,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 21:08:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:03,983 INFO L225 Difference]: With dead ends: 124 [2020-07-20 21:08:03,983 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:08:03,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:08:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 21:08:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:08:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-20 21:08:04,009 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-20 21:08:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,010 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-20 21:08:04,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-20 21:08:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:08:04,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,016 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:04,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-20 21:08:04,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327098273] [2020-07-20 21:08:04,218 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 21:08:04,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:04,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:04,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327098273] [2020-07-20 21:08:04,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:04,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:08:04,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022570246] [2020-07-20 21:08:04,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:08:04,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:08:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:08:04,357 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-20 21:08:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:04,453 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-20 21:08:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:08:04,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 21:08:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:04,456 INFO L225 Difference]: With dead ends: 128 [2020-07-20 21:08:04,456 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:08:04,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:08:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-20 21:08:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 21:08:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-20 21:08:04,468 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-20 21:08:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,468 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-20 21:08:04,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:08:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-20 21:08:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 21:08:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:04,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:04,686 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-20 21:08:04,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:04,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556835905] [2020-07-20 21:08:04,687 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 21:08:04,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:08:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:04,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:08:04,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556835905] [2020-07-20 21:08:04,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:08:04,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:08:04,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005137222] [2020-07-20 21:08:04,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:08:04,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:08:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:08:04,789 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-20 21:08:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:04,910 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-20 21:08:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:08:04,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-20 21:08:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:04,912 INFO L225 Difference]: With dead ends: 133 [2020-07-20 21:08:04,913 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 21:08:04,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 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 21:08:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 21:08:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-20 21:08:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 21:08:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-20 21:08:04,924 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-20 21:08:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:04,925 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-20 21:08:04,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:08:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-20 21:08:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:08:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:04,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:05,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:05,142 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-20 21:08:05,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:05,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675705309] [2020-07-20 21:08:05,145 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 21:08:05,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:08:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:05,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:05,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675705309] [2020-07-20 21:08:05,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:05,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 21:08:05,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690875807] [2020-07-20 21:08:05,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:08:05,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:05,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:08:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:08:05,346 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-20 21:08:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:05,453 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-20 21:08:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:08:05,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-20 21:08:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:05,455 INFO L225 Difference]: With dead ends: 147 [2020-07-20 21:08:05,456 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:08:05,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:08:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:08:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-20 21:08:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 21:08:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-20 21:08:05,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-20 21:08:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:05,469 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-20 21:08:05,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:08:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-20 21:08:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 21:08:05,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:05,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:05,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:05,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-20 21:08:05,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:05,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387636420] [2020-07-20 21:08:05,689 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 21:08:05,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:08:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:05,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:05,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387636420] [2020-07-20 21:08:05,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:05,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 21:08:05,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628253421] [2020-07-20 21:08:05,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:08:05,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:08:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:08:05,944 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-20 21:08:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:06,306 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-20 21:08:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:08:06,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-20 21:08:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:06,308 INFO L225 Difference]: With dead ends: 172 [2020-07-20 21:08:06,309 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 21:08:06,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:08:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 21:08:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-20 21:08:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 21:08:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-20 21:08:06,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-20 21:08:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:06,323 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-20 21:08:06,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:08:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-20 21:08:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 21:08:06,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:06,324 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:06,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:06,539 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-20 21:08:06,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:06,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904606794] [2020-07-20 21:08:06,540 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 21:08:06,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:08:06,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:08:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:06,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:06,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904606794] [2020-07-20 21:08:06,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:06,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 21:08:06,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297198498] [2020-07-20 21:08:06,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:08:06,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:06,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:08:06,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:08:06,822 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-20 21:08:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:08:07,011 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-20 21:08:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:08:07,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-20 21:08:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:08:07,016 INFO L225 Difference]: With dead ends: 210 [2020-07-20 21:08:07,016 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 21:08:07,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:08:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 21:08:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-20 21:08:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:08:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-20 21:08:07,056 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-20 21:08:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:08:07,056 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-20 21:08:07,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:08:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-20 21:08:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 21:08:07,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:08:07,058 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:08:07,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:07,259 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:08:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:08:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-20 21:08:07,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:08:07,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107600422] [2020-07-20 21:08:07,262 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:08:07,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:08:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:08:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:08:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:08:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:08:07,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:08:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:08:07,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107600422] [2020-07-20 21:08:07,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:08:07,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 21:08:07,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704983119] [2020-07-20 21:08:07,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:08:07,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:08:07,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:08:07,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:08:07,675 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-20 21:08:12,132 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 21:08:35,150 WARN L193 SmtUtils]: Spent 20.86 s on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-07-20 21:08:54,161 WARN L193 SmtUtils]: Spent 12.80 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 21:09:07,356 WARN L193 SmtUtils]: Spent 8.39 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 21:09:22,063 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 21:09:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:35,008 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-20 21:09:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 21:09:35,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-20 21:09:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:35,011 INFO L225 Difference]: With dead ends: 242 [2020-07-20 21:09:35,011 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 21:09:35,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=314, Invalid=603, Unknown=13, NotChecked=0, Total=930 [2020-07-20 21:09:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 21:09:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-20 21:09:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 21:09:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-20 21:09:35,027 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-20 21:09:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:35,027 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-20 21:09:35,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:09:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-20 21:09:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 21:09:35,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:35,029 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:35,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:35,230 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-20 21:09:35,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:35,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566614795] [2020-07-20 21:09:35,232 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:35,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:09:35,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:09:35,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:09:35,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566614795] [2020-07-20 21:09:35,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:35,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 21:09:35,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318061430] [2020-07-20 21:09:35,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:09:35,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:35,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:09:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:09:35,943 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-20 21:09:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:36,342 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-20 21:09:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 21:09:36,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-20 21:09:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:36,345 INFO L225 Difference]: With dead ends: 336 [2020-07-20 21:09:36,346 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 21:09:36,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 21:09:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 21:09:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-20 21:09:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 21:09:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-20 21:09:36,373 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-20 21:09:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:36,373 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-20 21:09:36,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:09:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-20 21:09:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 21:09:36,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:36,375 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:36,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,590 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-20 21:09:36,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:36,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10175054] [2020-07-20 21:09:36,591 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 21:09:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:09:36,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:09:37,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10175054] [2020-07-20 21:09:37,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:37,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 21:09:37,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440675624] [2020-07-20 21:09:37,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 21:09:37,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 21:09:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:09:37,879 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-20 21:10:07,508 WARN L193 SmtUtils]: Spent 23.37 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 21:10:42,688 WARN L193 SmtUtils]: Spent 20.79 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 21:11:04,679 WARN L193 SmtUtils]: Spent 10.81 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 21:11:42,504 WARN L193 SmtUtils]: Spent 16.87 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 21:12:14,216 WARN L193 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 21:12:41,967 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 21:12:51,679 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 21:13:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:05,307 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-20 21:13:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 21:13:05,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-20 21:13:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:05,316 INFO L225 Difference]: With dead ends: 346 [2020-07-20 21:13:05,316 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 21:13:05,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 193.6s TimeCoverageRelationStatistics Valid=917, Invalid=2230, Unknown=45, NotChecked=0, Total=3192 [2020-07-20 21:13:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 21:13:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-20 21:13:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 21:13:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-20 21:13:05,333 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-20 21:13:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:05,334 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-20 21:13:05,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 21:13:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-20 21:13:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 21:13:05,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:05,336 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:05,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:05,537 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:05,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-20 21:13:05,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:05,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406734753] [2020-07-20 21:13:05,539 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:05,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:05,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 21:13:05,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:13:06,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:13:08,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406734753] [2020-07-20 21:13:08,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:08,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 21:13:08,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482132182] [2020-07-20 21:13:08,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 21:13:08,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 21:13:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 21:13:08,079 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-20 21:13:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:09,400 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-20 21:13:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 21:13:09,401 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-20 21:13:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:09,408 INFO L225 Difference]: With dead ends: 570 [2020-07-20 21:13:09,409 INFO L226 Difference]: Without dead ends: 450 [2020-07-20 21:13:09,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 21:13:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-20 21:13:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-20 21:13:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:13:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-20 21:13:09,458 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-20 21:13:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:09,458 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-20 21:13:09,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 21:13:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-20 21:13:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 21:13:09,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:09,460 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:09,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:09,674 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-20 21:13:09,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:09,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469501519] [2020-07-20 21:13:09,675 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:09,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:13:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:09,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:09,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469501519] [2020-07-20 21:13:09,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:09,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:13:09,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951959123] [2020-07-20 21:13:09,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:13:09,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:09,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:13:09,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:13:09,792 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 3 states. [2020-07-20 21:13:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:09,809 INFO L93 Difference]: Finished difference Result 209 states and 323 transitions. [2020-07-20 21:13:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:13:09,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-07-20 21:13:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:09,812 INFO L225 Difference]: With dead ends: 209 [2020-07-20 21:13:09,812 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 21:13:09,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 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 21:13:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 21:13:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-20 21:13:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:13:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 309 transitions. [2020-07-20 21:13:09,826 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 309 transitions. Word has length 122 [2020-07-20 21:13:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:09,826 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 309 transitions. [2020-07-20 21:13:09,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:13:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 309 transitions. [2020-07-20 21:13:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:13:09,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:09,828 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:10,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,042 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1044966756, now seen corresponding path program 1 times [2020-07-20 21:13:10,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:10,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829919974] [2020-07-20 21:13:10,044 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 21:13:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:10,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:10,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829919974] [2020-07-20 21:13:10,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:10,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:10,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154756788] [2020-07-20 21:13:10,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:10,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:10,218 INFO L87 Difference]: Start difference. First operand 198 states and 309 transitions. Second operand 6 states. [2020-07-20 21:13:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:10,377 INFO L93 Difference]: Finished difference Result 229 states and 352 transitions. [2020-07-20 21:13:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:10,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-07-20 21:13:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:10,381 INFO L225 Difference]: With dead ends: 229 [2020-07-20 21:13:10,381 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 21:13:10,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 21:13:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2020-07-20 21:13:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 317 transitions. [2020-07-20 21:13:10,397 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 317 transitions. Word has length 124 [2020-07-20 21:13:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:10,397 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 317 transitions. [2020-07-20 21:13:10,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 317 transitions. [2020-07-20 21:13:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:13:10,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:10,399 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:10,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,613 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:10,613 INFO L82 PathProgramCache]: Analyzing trace with hash -786801318, now seen corresponding path program 1 times [2020-07-20 21:13:10,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:10,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125985938] [2020-07-20 21:13:10,614 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:10,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:10,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:13:10,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:10,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:10,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125985938] [2020-07-20 21:13:10,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:10,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:13:10,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800010442] [2020-07-20 21:13:10,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:13:10,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:13:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:13:10,706 INFO L87 Difference]: Start difference. First operand 204 states and 317 transitions. Second operand 4 states. [2020-07-20 21:13:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:10,732 INFO L93 Difference]: Finished difference Result 214 states and 328 transitions. [2020-07-20 21:13:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:13:10,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-07-20 21:13:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:10,740 INFO L225 Difference]: With dead ends: 214 [2020-07-20 21:13:10,740 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 21:13:10,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:13:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 21:13:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-07-20 21:13:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 21:13:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-20 21:13:10,757 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 124 [2020-07-20 21:13:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:10,758 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-20 21:13:10,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:13:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-20 21:13:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:13:10,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:10,760 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:10,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:10,974 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 1 times [2020-07-20 21:13:10,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:10,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582977432] [2020-07-20 21:13:10,976 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:11,075 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:13:11,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:13:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:12,535 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 21:13:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:12,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:12,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582977432] [2020-07-20 21:13:12,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:12,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 21:13:12,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560173898] [2020-07-20 21:13:12,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:13:12,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:13:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:12,672 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 8 states. [2020-07-20 21:13:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:12,943 INFO L93 Difference]: Finished difference Result 222 states and 339 transitions. [2020-07-20 21:13:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:13:12,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-07-20 21:13:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:12,946 INFO L225 Difference]: With dead ends: 222 [2020-07-20 21:13:12,947 INFO L226 Difference]: Without dead ends: 217 [2020-07-20 21:13:12,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:13:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-20 21:13:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 205. [2020-07-20 21:13:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-20 21:13:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 316 transitions. [2020-07-20 21:13:12,967 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 316 transitions. Word has length 124 [2020-07-20 21:13:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:12,967 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 316 transitions. [2020-07-20 21:13:12,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 316 transitions. [2020-07-20 21:13:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 21:13:12,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:12,969 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:13,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,184 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-07-20 21:13:13,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:13,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709748087] [2020-07-20 21:13:13,186 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:13,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 21:13:13,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:13,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709748087] [2020-07-20 21:13:13,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:13,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 21:13:13,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028513368] [2020-07-20 21:13:13,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:13,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:13,417 INFO L87 Difference]: Start difference. First operand 205 states and 316 transitions. Second operand 7 states. [2020-07-20 21:13:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:13,557 INFO L93 Difference]: Finished difference Result 232 states and 354 transitions. [2020-07-20 21:13:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:13,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-07-20 21:13:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:13,561 INFO L225 Difference]: With dead ends: 232 [2020-07-20 21:13:13,561 INFO L226 Difference]: Without dead ends: 227 [2020-07-20 21:13:13,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:13:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-20 21:13:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2020-07-20 21:13:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-20 21:13:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 339 transitions. [2020-07-20 21:13:13,587 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 339 transitions. Word has length 124 [2020-07-20 21:13:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:13,588 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 339 transitions. [2020-07-20 21:13:13,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 339 transitions. [2020-07-20 21:13:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:13:13,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:13,591 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:13,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:13,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-20 21:13:13,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:13,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555321357] [2020-07-20 21:13:13,807 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:13,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 21:13:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-07-20 21:13:14,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:14,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555321357] [2020-07-20 21:13:14,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:14,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 21:13:14,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856588280] [2020-07-20 21:13:14,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:13:14,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:13:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:13:14,002 INFO L87 Difference]: Start difference. First operand 218 states and 339 transitions. Second operand 10 states. [2020-07-20 21:13:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:14,203 INFO L93 Difference]: Finished difference Result 254 states and 386 transitions. [2020-07-20 21:13:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:13:14,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-07-20 21:13:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:14,207 INFO L225 Difference]: With dead ends: 254 [2020-07-20 21:13:14,207 INFO L226 Difference]: Without dead ends: 244 [2020-07-20 21:13:14,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:13:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-20 21:13:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2020-07-20 21:13:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 21:13:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 360 transitions. [2020-07-20 21:13:14,227 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 360 transitions. Word has length 126 [2020-07-20 21:13:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:14,227 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 360 transitions. [2020-07-20 21:13:14,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:13:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 360 transitions. [2020-07-20 21:13:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:13:14,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:14,231 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:14,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:14,444 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:14,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-20 21:13:14,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:14,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370909762] [2020-07-20 21:13:14,446 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:14,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:14,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:13:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:14,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:14,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370909762] [2020-07-20 21:13:14,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:14,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:14,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025377406] [2020-07-20 21:13:14,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:14,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:14,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:14,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:14,619 INFO L87 Difference]: Start difference. First operand 232 states and 360 transitions. Second operand 6 states. [2020-07-20 21:13:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:14,669 INFO L93 Difference]: Finished difference Result 238 states and 365 transitions. [2020-07-20 21:13:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:14,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 21:13:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:14,673 INFO L225 Difference]: With dead ends: 238 [2020-07-20 21:13:14,673 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 21:13:14,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 21:13:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-07-20 21:13:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 21:13:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 359 transitions. [2020-07-20 21:13:14,692 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 359 transitions. Word has length 126 [2020-07-20 21:13:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:14,692 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 359 transitions. [2020-07-20 21:13:14,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 359 transitions. [2020-07-20 21:13:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 21:13:14,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:14,695 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:14,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:14,909 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-20 21:13:14,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:14,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353125697] [2020-07-20 21:13:14,910 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:14,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 21:13:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 21:13:15,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:15,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353125697] [2020-07-20 21:13:15,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:15,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:13:15,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229383707] [2020-07-20 21:13:15,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:15,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:15,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:13:15,021 INFO L87 Difference]: Start difference. First operand 232 states and 359 transitions. Second operand 6 states. [2020-07-20 21:13:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:15,085 INFO L93 Difference]: Finished difference Result 252 states and 382 transitions. [2020-07-20 21:13:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:15,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 21:13:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:15,090 INFO L225 Difference]: With dead ends: 252 [2020-07-20 21:13:15,090 INFO L226 Difference]: Without dead ends: 239 [2020-07-20 21:13:15,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-20 21:13:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2020-07-20 21:13:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-07-20 21:13:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 360 transitions. [2020-07-20 21:13:15,112 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 360 transitions. Word has length 126 [2020-07-20 21:13:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:15,113 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 360 transitions. [2020-07-20 21:13:15,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 360 transitions. [2020-07-20 21:13:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 21:13:15,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:15,116 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:15,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:15,329 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-07-20 21:13:15,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:15,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297941696] [2020-07-20 21:13:15,332 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:16,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:16,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:13:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 21:13:16,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:13:16,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297941696] [2020-07-20 21:13:16,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:13:16,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 21:13:16,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531985247] [2020-07-20 21:13:16,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:13:16,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:13:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:16,196 INFO L87 Difference]: Start difference. First operand 235 states and 360 transitions. Second operand 8 states. [2020-07-20 21:13:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:16,354 INFO L93 Difference]: Finished difference Result 266 states and 396 transitions. [2020-07-20 21:13:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:13:16,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-07-20 21:13:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:16,358 INFO L225 Difference]: With dead ends: 266 [2020-07-20 21:13:16,358 INFO L226 Difference]: Without dead ends: 245 [2020-07-20 21:13:16,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:13:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-20 21:13:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2020-07-20 21:13:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-20 21:13:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 345 transitions. [2020-07-20 21:13:16,377 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 345 transitions. Word has length 127 [2020-07-20 21:13:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:16,377 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 345 transitions. [2020-07-20 21:13:16,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 345 transitions. [2020-07-20 21:13:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 21:13:16,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:16,380 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:16,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:16,586 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1656833207, now seen corresponding path program 1 times [2020-07-20 21:13:16,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:16,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445121905] [2020-07-20 21:13:16,586 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:16,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:16,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:16,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445121905] [2020-07-20 21:13:16,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:16,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 21:13:16,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858910233] [2020-07-20 21:13:16,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:13:16,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:13:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:13:16,736 INFO L87 Difference]: Start difference. First operand 229 states and 345 transitions. Second operand 6 states. [2020-07-20 21:13:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:16,811 INFO L93 Difference]: Finished difference Result 234 states and 349 transitions. [2020-07-20 21:13:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:13:16,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-07-20 21:13:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:16,817 INFO L225 Difference]: With dead ends: 234 [2020-07-20 21:13:16,817 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 21:13:16,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:13:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 21:13:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2020-07-20 21:13:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 310 transitions. [2020-07-20 21:13:16,836 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 310 transitions. Word has length 128 [2020-07-20 21:13:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:16,836 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 310 transitions. [2020-07-20 21:13:16,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:13:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 310 transitions. [2020-07-20 21:13:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 21:13:16,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:16,838 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:17,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:17,054 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-07-20 21:13:17,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:17,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602464386] [2020-07-20 21:13:17,056 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:17,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:17,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:13:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-20 21:13:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602464386] [2020-07-20 21:13:17,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:17,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 21:13:17,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115334620] [2020-07-20 21:13:17,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:13:17,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:13:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:13:17,838 INFO L87 Difference]: Start difference. First operand 204 states and 310 transitions. Second operand 15 states. [2020-07-20 21:13:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:18,097 INFO L93 Difference]: Finished difference Result 231 states and 344 transitions. [2020-07-20 21:13:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:13:18,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-20 21:13:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:18,108 INFO L225 Difference]: With dead ends: 231 [2020-07-20 21:13:18,108 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 21:13:18,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:13:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 21:13:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-20 21:13:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-20 21:13:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-07-20 21:13:18,121 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 131 [2020-07-20 21:13:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:18,122 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-07-20 21:13:18,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:13:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-07-20 21:13:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:18,124 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:18,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:18,328 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-07-20 21:13:18,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:18,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224062032] [2020-07-20 21:13:18,329 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:18,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:18,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:13:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:21,470 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:13:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:24,870 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 21:13:24,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224062032] [2020-07-20 21:13:24,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:24,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 21:13:24,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103668538] [2020-07-20 21:13:24,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:13:24,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:13:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=54, Unknown=2, NotChecked=0, Total=72 [2020-07-20 21:13:24,873 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 8 states. [2020-07-20 21:13:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:45,408 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2020-07-20 21:13:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:13:45,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-20 21:13:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:45,652 INFO L225 Difference]: With dead ends: 237 [2020-07-20 21:13:45,652 INFO L226 Difference]: Without dead ends: 227 [2020-07-20 21:13:45,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20, Invalid=68, Unknown=2, NotChecked=0, Total=90 [2020-07-20 21:13:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-20 21:13:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 221. [2020-07-20 21:13:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 21:13:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2020-07-20 21:13:45,669 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 135 [2020-07-20 21:13:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:45,670 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2020-07-20 21:13:45,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:13:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2020-07-20 21:13:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:45,671 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:45,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:45,877 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 1 times [2020-07-20 21:13:45,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:45,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421033686] [2020-07-20 21:13:45,878 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:46,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:46,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:13:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:46,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:48,455 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~r_mul~0 Int)) (<= (mod main_~r_mul~0 4294967296) (mod c_main_~zero~0 4294967296))) is different from false [2020-07-20 21:13:48,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421033686] [2020-07-20 21:13:48,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:48,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 21:13:48,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325019553] [2020-07-20 21:13:48,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:13:48,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:13:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2020-07-20 21:13:48,468 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand 7 states. [2020-07-20 21:13:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:48,660 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2020-07-20 21:13:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:13:48,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-07-20 21:13:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:48,667 INFO L225 Difference]: With dead ends: 231 [2020-07-20 21:13:48,667 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 21:13:48,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2020-07-20 21:13:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 21:13:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-07-20 21:13:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-20 21:13:48,682 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-20 21:13:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:48,683 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-20 21:13:48,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:13:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-20 21:13:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:48,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:48,684 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:48,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:48,889 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-07-20 21:13:48,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:48,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911730375] [2020-07-20 21:13:48,889 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:49,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:13:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 21:13:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:49,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911730375] [2020-07-20 21:13:49,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:49,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 21:13:49,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037731562] [2020-07-20 21:13:49,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:13:49,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:13:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:13:49,890 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 10 states. [2020-07-20 21:13:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:50,204 INFO L93 Difference]: Finished difference Result 224 states and 285 transitions. [2020-07-20 21:13:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:13:50,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-20 21:13:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:50,209 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:13:50,209 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 21:13:50,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:13:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 21:13:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-20 21:13:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 21:13:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-07-20 21:13:50,223 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 135 [2020-07-20 21:13:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:50,223 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-07-20 21:13:50,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:13:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-07-20 21:13:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:50,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:50,225 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:50,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:50,428 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-20 21:13:50,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:50,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332848105] [2020-07-20 21:13:50,429 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:50,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:13:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 21:13:51,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332848105] [2020-07-20 21:13:52,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:52,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 21:13:52,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713056976] [2020-07-20 21:13:52,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:13:52,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:13:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:13:52,867 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 14 states. [2020-07-20 21:13:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:53,785 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2020-07-20 21:13:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:13:53,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-20 21:13:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:53,791 INFO L225 Difference]: With dead ends: 219 [2020-07-20 21:13:53,791 INFO L226 Difference]: Without dead ends: 201 [2020-07-20 21:13:53,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:13:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-20 21:13:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-07-20 21:13:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-20 21:13:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2020-07-20 21:13:53,806 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 135 [2020-07-20 21:13:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:53,806 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2020-07-20 21:13:53,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:13:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2020-07-20 21:13:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 21:13:53,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:53,808 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:54,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:54,020 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-20 21:13:54,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:54,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459308151] [2020-07-20 21:13:54,021 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:54,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:13:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-20 21:13:54,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:55,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459308151] [2020-07-20 21:13:55,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 21:13:55,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 21:13:55,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133706149] [2020-07-20 21:13:55,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:13:55,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:55,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:13:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:13:55,358 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand 10 states. [2020-07-20 21:13:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:55,740 INFO L93 Difference]: Finished difference Result 201 states and 257 transitions. [2020-07-20 21:13:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:13:55,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-20 21:13:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:55,741 INFO L225 Difference]: With dead ends: 201 [2020-07-20 21:13:55,741 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:13:55,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:13:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:13:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:13:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:13:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:13:55,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-20 21:13:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:55,743 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:13:55,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:13:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:13:55,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:13:55,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:55,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:13:56,517 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 362 [2020-07-20 21:13:56,636 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 362 [2020-07-20 21:13:56,748 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 362 [2020-07-20 21:13:56,860 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 362 [2020-07-20 21:13:56,987 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 362 [2020-07-20 21:13:57,331 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-07-20 21:14:09,600 WARN L193 SmtUtils]: Spent 12.26 s on a formula simplification. DAG size of input: 280 DAG size of output: 37 [2020-07-20 21:14:09,734 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 9 [2020-07-20 21:14:10,605 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 20 [2020-07-20 21:14:10,840 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 19 [2020-07-20 21:14:10,844 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:14:10,845 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:14:10,845 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 21:14:10,845 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 21:14:10,845 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 21:14:10,845 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (<= base2flt_~e |base2flt_#in~e|) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 21:14:10,846 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 21:14:10,847 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~b |mulflt_#in~b|)) (.cse2 (= mulflt_~b |mulflt_#in~a|)) (.cse3 (= 0 mulflt_~__retres10~1))) (and (let ((.cse0 (= mulflt_~a |mulflt_#in~a|))) (or (and .cse0 .cse1) (and (or .cse0 .cse2) (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296))))) (or (and (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)) .cse1) .cse2 .cse3) (or (and (not (= 0 (mod |mulflt_#in~a| 4294967296))) (not (= 0 (mod |mulflt_#in~b| 4294967296)))) .cse3))) [2020-07-20 21:14:10,847 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:14:10,848 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 21:14:10,848 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 21:14:10,849 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 21:14:10,849 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 21:14:10,849 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 21:14:10,849 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 21:14:10,850 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 21:14:10,850 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:14:10,850 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 21:14:10,851 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 21:14:10,851 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 21:14:10,851 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 21:14:10,851 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 21:14:10,851 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (<= (mod main_~a~0 4294967296) (mod main_~zero~0 4294967296)) (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0) (<= (mod main_~zero~0 4294967296) (mod main_~a~0 4294967296))) [2020-07-20 21:14:10,851 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 21:14:10,851 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:14:10,852 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (or (<= (+ main_~sa~0 1) 0) (and (<= (mod main_~zero~0 4294967296) (mod main_~a~0 4294967296)) (= 0 main_~a~0) (= 0 main_~b~0)) (and (<= 1 main_~sa~0) (<= 1 main_~tmp~2) (< (mod main_~zero~0 4294967296) (mod main_~a~0 4294967296))) (and (= 0 main_~zero~0) (<= (mod main_~a~0 4294967296) (mod main_~zero~0 4294967296)))) [2020-07-20 21:14:10,852 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 21:14:10,852 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 21:14:10,852 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 21:14:10,852 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 21:14:10,852 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 21:14:10,852 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 21:14:10,853 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 21:14:10,854 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 21:14:10,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:14:10 BoogieIcfgContainer [2020-07-20 21:14:10,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:14:10,878 INFO L168 Benchmark]: Toolchain (without parser) took 369476.28 ms. Allocated memory was 138.9 MB in the beginning and 242.2 MB in the end (delta: 103.3 MB). Free memory was 102.5 MB in the beginning and 164.3 MB in the end (delta: -61.8 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,879 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 488.73 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.1 MB in the beginning and 182.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,879 INFO L168 Benchmark]: Boogie Preprocessor took 48.39 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,880 INFO L168 Benchmark]: RCFGBuilder took 576.32 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 155.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,880 INFO L168 Benchmark]: TraceAbstraction took 368356.27 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 154.5 MB in the beginning and 164.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 119.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:14:10,882 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 488.73 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.1 MB in the beginning and 182.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.39 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 576.32 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 155.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 368356.27 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 154.5 MB in the beginning and 164.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 119.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: (((a == \old(a) && b == \old(b)) || ((a == \old(a) || b == \old(a)) && \old(a) % 4294967296 < \old(b) % 4294967296)) && (((b % 4294967296 <= \old(a) % 4294967296 && b == \old(b)) || b == \old(a)) || 0 == __retres10)) && ((!(0 == \old(a) % 4294967296) && !(0 == \old(b) % 4294967296)) || 0 == __retres10) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((!(1 == \old(m)) || m % 4294967296 < 16777216) && e <= \old(e)) && !(\old(m) % 4294967296 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 353.3s, OverallIterations: 28, TraceHistogramMax: 24, AutomataDifference: 321.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1974 SDtfs, 3190 SDslu, 9513 SDs, 0 SdLazy, 3851 SolverSat, 393 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 43.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3773 GetRequests, 3359 SyntacticMatches, 22 SemanticMatches, 392 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 292.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 798 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 233 PreInvPairs, 811 NumberOfFragments, 197 HoareAnnotationTreeSize, 233 FomulaSimplifications, 12107 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 12230 FormulaSimplificationTreeSizeReductionInter, 13.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 2844 NumberOfCodeBlocks, 1824 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 3470 ConstructedInterpolants, 13 QuantifiedInterpolants, 735887 SizeOfPredicates, 73 NumberOfNonLiveVariables, 5943 ConjunctsInSsa, 341 ConjunctsInUnsatCore, 36 InterpolantComputations, 13 PerfectInterpolantSequences, 15084/17673 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...