/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/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:56:20,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:56:20,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:56:20,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:56:20,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:56:20,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:56:20,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:56:20,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:56:20,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:56:20,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:56:20,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:56:20,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:56:20,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:56:20,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:56:20,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:56:20,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:56:20,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:56:20,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:56:20,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:56:20,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:56:20,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:56:20,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:56:20,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:56:20,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:56:20,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:56:20,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:56:20,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:56:20,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:56:20,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:56:20,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:56:20,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:56:20,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:56:20,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:56:20,291 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:56:20,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:56:20,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:56:20,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:56:20,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:56:20,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:56:20,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:56:20,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:56:20,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:56:20,293 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:56:20,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:56:20,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:56:20,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:56:20,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:56:20,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:56:20,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:56:20,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:56:20,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:56:20,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:56:20,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:56:20,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:56:20,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:56:20,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:20,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:56:20,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:56:20,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:56:20,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:56:20,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:56:20,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:56:20,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:56:20,622 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:56:20,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 22:56:20,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db11aef9/9f04d33f874a4fc581c1fb78baa87fed/FLAG254e97401 [2020-07-20 22:56:21,212 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:56:21,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 22:56:21,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db11aef9/9f04d33f874a4fc581c1fb78baa87fed/FLAG254e97401 [2020-07-20 22:56:21,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5db11aef9/9f04d33f874a4fc581c1fb78baa87fed [2020-07-20 22:56:21,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:56:21,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:56:21,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:56:21,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:56:21,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:56:21,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21762d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21, skipping insertion in model container [2020-07-20 22:56:21,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:56:21,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:56:21,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:56:21,784 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:56:21,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:56:21,827 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:56:21,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21 WrapperNode [2020-07-20 22:56:21,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:56:21,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:56:21,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:56:21,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:56:21,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... [2020-07-20 22:56:21,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:56:21,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:56:21,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:56:21,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:56:21,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:56:22,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:56:22,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:56:22,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:56:22,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:56:22,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:56:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:56:22,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:56:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:56:22,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:56:22,242 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:56:22,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:56:22 BoogieIcfgContainer [2020-07-20 22:56:22,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:56:22,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:56:22,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:56:22,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:56:22,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:56:21" (1/3) ... [2020-07-20 22:56:22,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b807030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:56:22, skipping insertion in model container [2020-07-20 22:56:22,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:56:21" (2/3) ... [2020-07-20 22:56:22,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b807030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:56:22, skipping insertion in model container [2020-07-20 22:56:22,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:56:22" (3/3) ... [2020-07-20 22:56:22,255 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-20 22:56:22,267 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:56:22,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:56:22,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:56:22,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:56:22,317 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:56:22,317 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:56:22,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:56:22,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:56:22,318 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:56:22,318 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:56:22,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:56:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 22:56:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:56:22,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:22,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:22,347 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 22:56:22,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:22,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982976094] [2020-07-20 22:56:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:22,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:56:22,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:56:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:56:22,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:56:22,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982976094] [2020-07-20 22:56:22,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:56:22,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:56:22,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427954393] [2020-07-20 22:56:22,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:56:22,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:56:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:56:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:56:22,610 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 22:56:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:22,728 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-07-20 22:56:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:56:22,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:56:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:22,743 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:56:22,743 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 22:56:22,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:56:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 22:56:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 22:56:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 22:56:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 22:56:22,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 22:56:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:22,799 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 22:56:22,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:56:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 22:56:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:56:22,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:22,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:23,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:23,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 22:56:23,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:23,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285241321] [2020-07-20 22:56:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:23,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:56:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:56:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:56:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:56:23,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:56:29,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285241321] [2020-07-20 22:56:29,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:56:29,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 22:56:29,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360493701] [2020-07-20 22:56:29,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:56:29,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:56:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:56:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=37, Unknown=3, NotChecked=0, Total=56 [2020-07-20 22:56:29,451 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-20 22:56:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:35,730 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-07-20 22:56:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:56:35,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 22:56:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:35,735 INFO L225 Difference]: With dead ends: 30 [2020-07-20 22:56:35,736 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 22:56:35,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20, Invalid=49, Unknown=3, NotChecked=0, Total=72 [2020-07-20 22:56:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 22:56:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 22:56:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:56:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-20 22:56:35,751 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-20 22:56:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:35,751 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-20 22:56:35,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:56:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-20 22:56:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 22:56:35,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:35,755 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:35,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:35,971 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-20 22:56:35,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:35,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935408122] [2020-07-20 22:56:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:36,007 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:56:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:56:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:36,081 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:56:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 22:56:36,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:56:36,424 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 22:56:36,431 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:56:36,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:36,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 22:56:36,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935408122] [2020-07-20 22:56:36,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:56:36,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-20 22:56:36,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500590470] [2020-07-20 22:56:36,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:56:36,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:56:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:56:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:56:36,554 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-20 22:56:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:38,712 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 22:56:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:56:38,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-20 22:56:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:38,714 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:56:38,714 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 22:56:38,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:56:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 22:56:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 22:56:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:56:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 22:56:38,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-20 22:56:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:38,723 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 22:56:38,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:56:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 22:56:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:56:38,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:38,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:38,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:38,938 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 22:56:38,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:38,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116184613] [2020-07-20 22:56:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:39,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:56:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 22:56:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:43,444 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 22:56:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:56:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:56:43,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:58,598 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 22:56:58,616 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:56:58,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:00,664 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-20 22:57:00,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:00,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:03,479 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-20 22:57:03,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-20 22:57:03,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116184613] [2020-07-20 22:57:03,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:03,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 22:57:03,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004615060] [2020-07-20 22:57:03,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:57:03,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:57:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=119, Unknown=10, NotChecked=46, Total=210 [2020-07-20 22:57:03,511 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-20 22:57:25,911 WARN L193 SmtUtils]: Spent 15.65 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 22:57:33,693 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 22:57:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:48,038 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-20 22:57:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:57:48,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-20 22:57:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:48,095 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:57:48,095 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:57:48,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=58, Invalid=210, Unknown=12, NotChecked=62, Total=342 [2020-07-20 22:57:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:57:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 22:57:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:57:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 22:57:48,103 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 22:57:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:48,104 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 22:57:48,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:57:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 22:57:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:57:48,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:48,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:48,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:48,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 22:57:48,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:48,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108776831] [2020-07-20 22:57:48,309 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