/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:21:39,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:21:39,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:21:39,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:21:39,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:21:39,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:21:39,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:21:39,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:21:39,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:21:39,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:21:39,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:21:39,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:21:39,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:21:39,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:21:39,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:21:39,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:21:39,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:21:39,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:21:39,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:21:39,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:21:39,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:21:39,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:21:39,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:21:39,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:21:39,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:21:39,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:21:39,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:21:39,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:21:39,574 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 12:21:39,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:21:39,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:21:39,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:21:39,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:21:39,597 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:21:39,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:21:39,598 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:21:39,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:21:39,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:21:39,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:21:39,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:21:39,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:21:39,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:21:39,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:21:39,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:21:39,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:21:39,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:21:39,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:21:39,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:21:39,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:21:39,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:21:39,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:21:39,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:21:39,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:21:39,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:21:39,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:21:39,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:39,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:21:39,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:21:39,603 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 -> NOT_INCREMENTALLY [2020-07-20 12:21:39,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:21:39,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:21:39,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:21:39,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:21:39,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:21:39,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 12:21:39,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b/FLAG6da09e29a [2020-07-20 12:21:40,451 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:21:40,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 12:21:40,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b/FLAG6da09e29a [2020-07-20 12:21:40,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b [2020-07-20 12:21:40,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:21:40,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:21:40,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:21:40,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:21:40,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:21:40,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:40" (1/1) ... [2020-07-20 12:21:40,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e15673d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:40, skipping insertion in model container [2020-07-20 12:21:40,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:40" (1/1) ... [2020-07-20 12:21:40,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:21:40,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:21:41,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:21:41,138 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:21:41,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:21:41,173 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:21:41,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41 WrapperNode [2020-07-20 12:21:41,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:21:41,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:21:41,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:21:41,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:21:41,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ... [2020-07-20 12:21:41,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:21:41,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:21:41,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:21:41,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:21:41,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (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 12:21:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:21:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:21:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:21:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:21:41,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:21:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:21:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:21:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:21:41,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:21:41,562 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:21:41,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:41 BoogieIcfgContainer [2020-07-20 12:21:41,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:21:41,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:21:41,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:21:41,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:21:41,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:21:40" (1/3) ... [2020-07-20 12:21:41,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f04218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:41, skipping insertion in model container [2020-07-20 12:21:41,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (2/3) ... [2020-07-20 12:21:41,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f04218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:41, skipping insertion in model container [2020-07-20 12:21:41,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:41" (3/3) ... [2020-07-20 12:21:41,574 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-20 12:21:41,585 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:21:41,593 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:21:41,607 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:21:41,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:21:41,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:21:41,628 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:21:41,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:21:41,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:21:41,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:21:41,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:21:41,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:21:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 12:21:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 12:21:41,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:41,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:41,650 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:41,655 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 12:21:41,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:41,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083957881] [2020-07-20 12:21:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:41,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 12:21:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:41,757 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 12:21:41,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:21:41,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083957881] [2020-07-20 12:21:41,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:21:41,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 12:21:41,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231719431] [2020-07-20 12:21:41,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 12:21:41,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:41,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 12:21:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:21:41,785 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 12:21:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:21:41,813 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 12:21:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 12:21:41,815 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 12:21:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:21:41,824 INFO L225 Difference]: With dead ends: 35 [2020-07-20 12:21:41,824 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 12:21:41,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:21:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 12:21:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 12:21:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:21:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 12:21:41,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 12:21:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:21:41,878 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 12:21:41,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 12:21:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 12:21:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 12:21:41,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:41,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:42,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:42,098 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 12:21:42,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:42,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239863252] [2020-07-20 12:21:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:21:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:42,237 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 12:21:42,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:21:42,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239863252] [2020-07-20 12:21:42,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:21:42,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:21:42,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505154718] [2020-07-20 12:21:42,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:21:42,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:21:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:21:42,242 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 12:21:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:21:42,310 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 12:21:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:21:42,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 12:21:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:21:42,312 INFO L225 Difference]: With dead ends: 25 [2020-07-20 12:21:42,313 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 12:21:42,314 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 12:21:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 12:21:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 12:21:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 12:21:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 12:21:42,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 12:21:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:21:42,322 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 12:21:42,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:21:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 12:21:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 12:21:42,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:42,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:42,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:42,539 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 12:21:42,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:42,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547508735] [2020-07-20 12:21:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:21:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:21:42,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:21:42,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:51,286 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:21:51,291 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:21:51,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:53,318 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-20 12:21:53,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:21:53,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:21:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 12:21:53,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547508735] [2020-07-20 12:21:53,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:21:53,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 12:21:53,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762526027] [2020-07-20 12:21:53,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 12:21:53,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 12:21:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132 [2020-07-20 12:21:53,904 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-07-20 12:22:02,403 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 12:22:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:22:17,263 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 12:22:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 12:22:17,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-20 12:22:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:22:17,265 INFO L225 Difference]: With dead ends: 32 [2020-07-20 12:22:17,266 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 12:22:17,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210 [2020-07-20 12:22:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 12:22:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 12:22:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 12:22:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 12:22:17,275 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-20 12:22:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:22:17,275 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 12:22:17,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 12:22:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 12:22:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 12:22:17,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:22:17,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:22:17,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:22:17,478 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:22:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:22:17,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 12:22:17,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:22:17,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776901035] [2020-07-20 12:22:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:22:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:22:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:22:17,762 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 12:22:17,774 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:22:37,277 WARN L193 SmtUtils]: Spent 10.68 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:22:37,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:23:04,560 WARN L193 SmtUtils]: Spent 13.06 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:23:06,638 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:23:14,892 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from false [2020-07-20 12:23:16,909 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from true [2020-07-20 12:23:16,913 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 12:23:16,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:23:22,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:26,595 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 12:23:37,875 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 12:23:38,826 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:23:38,829 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:23:38,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:40,915 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0))) (or (= (+ (* c_main_~z~0 c_main_~a~0) (* main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0))) (not (= (+ .cse0 c_main_~a~0) (+ main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0))))))) is different from true [2020-07-20 12:23:40,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776901035] [2020-07-20 12:23:40,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:23:40,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 12:23:40,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389850024] [2020-07-20 12:23:40,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 12:23:40,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:23:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 12:23:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=146, Unknown=10, NotChecked=50, Total=240 [2020-07-20 12:23:40,918 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-07-20 12:25:45,964 WARN L193 SmtUtils]: Spent 1.59 m on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-07-20 12:25:57,051 WARN L193 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 6 [2020-07-20 12:25:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:25:59,987 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-20 12:25:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:25:59,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-07-20 12:25:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:25:59,998 INFO L225 Difference]: With dead ends: 37 [2020-07-20 12:25:59,998 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 12:25:59,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 184.3s TimeCoverageRelationStatistics Valid=53, Invalid=211, Unknown=16, NotChecked=62, Total=342 [2020-07-20 12:25:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 12:26:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 12:26:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 12:26:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 12:26:00,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 12:26:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:00,010 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 12:26:00,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 12:26:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 12:26:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 12:26:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:00,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:00,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:00,214 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 12:26:00,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:00,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742055964] [2020-07-20 12:26:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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