/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/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:48,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:48,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:48,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:48,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:48,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:48,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:48,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:48,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:48,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:48,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:48,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:48,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:48,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:48,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:48,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:48,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:48,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:48,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:48,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:48,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:48,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:48,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:48,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:48,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:48:48,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:48,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:48,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:48,686 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 11:48:48,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:48,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:48,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:48,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:48,725 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:48,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:48,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:48,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:48,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:48,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:48,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:48,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:48,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:48,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:48,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:48,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:48,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:48,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:48,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:48,734 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 11:48:49,006 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:49,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:49,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:49,024 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:49,024 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:49,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-20 11:48:49,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7c6a29e/86c9127765e24d0aa63d79b0fb59ae7b/FLAGdaafff153 [2020-07-20 11:48:49,553 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:49,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-20 11:48:49,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7c6a29e/86c9127765e24d0aa63d79b0fb59ae7b/FLAGdaafff153 [2020-07-20 11:48:49,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7c6a29e/86c9127765e24d0aa63d79b0fb59ae7b [2020-07-20 11:48:49,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:49,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:49,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:49,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:49,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:49,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:49" (1/1) ... [2020-07-20 11:48:49,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:49, skipping insertion in model container [2020-07-20 11:48:49,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:49" (1/1) ... [2020-07-20 11:48:49,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:49,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:50,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:50,129 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:50,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:50,155 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:50,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50 WrapperNode [2020-07-20 11:48:50,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:50,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:50,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:50,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:50,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (1/1) ... [2020-07-20 11:48:50,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:50,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:50,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:50,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:50,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (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 11:48:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:50,498 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:50,498 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:48:50,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:50 BoogieIcfgContainer [2020-07-20 11:48:50,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:50,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:50,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:50,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:50,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:49" (1/3) ... [2020-07-20 11:48:50,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593274d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:50, skipping insertion in model container [2020-07-20 11:48:50,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:50" (2/3) ... [2020-07-20 11:48:50,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593274d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:50, skipping insertion in model container [2020-07-20 11:48:50,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:50" (3/3) ... [2020-07-20 11:48:50,510 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-07-20 11:48:50,521 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:50,528 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:50,542 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:50,563 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:50,563 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:50,563 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:50,564 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:50,564 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:50,564 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:50,564 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:50,564 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 11:48:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:48:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:50,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:50,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-20 11:48:50,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:50,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325597012] [2020-07-20 11:48:50,603 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 11:48:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:50,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:48:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:50,716 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 11:48:50,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:50,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325597012] [2020-07-20 11:48:50,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:50,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:48:50,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383643119] [2020-07-20 11:48:50,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:48:50,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:48:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:50,753 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-20 11:48:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:50,789 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 11:48:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:48:50,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 11:48:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:50,799 INFO L225 Difference]: With dead ends: 29 [2020-07-20 11:48:50,800 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 11:48:50,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 11:48:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 11:48:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 11:48:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 11:48:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 11:48:50,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 11:48:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:50,841 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 11:48:50,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:48:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 11:48:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:48:50,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:50,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:51,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:51,050 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-20 11:48:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:51,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007401087] [2020-07-20 11:48:51,053 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 11:48:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:51,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:48:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:51,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007401087] [2020-07-20 11:48:51,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:51,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:48:51,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574416720] [2020-07-20 11:48:51,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:51,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:51,155 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-20 11:48:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:51,236 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-20 11:48:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:48:51,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-20 11:48:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:51,238 INFO L225 Difference]: With dead ends: 20 [2020-07-20 11:48:51,238 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 11:48:51,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 11:48:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 11:48:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:48:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 11:48:51,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-20 11:48:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:51,245 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 11:48:51,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 11:48:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:48:51,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:51,247 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:51,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:51,463 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-20 11:48:51,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:51,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885399857] [2020-07-20 11:48:51,466 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 11:48:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:48:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:51,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:53,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885399857] [2020-07-20 11:48:53,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:53,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 11:48:53,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351706185] [2020-07-20 11:48:53,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:48:53,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:48:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=85, Unknown=1, NotChecked=0, Total=132 [2020-07-20 11:48:53,822 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-20 11:48:56,046 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-20 11:48:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:56,473 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-07-20 11:48:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:48:56,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-20 11:48:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:56,475 INFO L225 Difference]: With dead ends: 26 [2020-07-20 11:48:56,475 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:48:56,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=94, Invalid=145, Unknown=1, NotChecked=0, Total=240 [2020-07-20 11:48:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:48:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:48:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:48:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 11:48:56,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-20 11:48:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:56,483 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 11:48:56,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:48:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 11:48:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:48:56,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:56,485 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:56,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:56,697 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 3 times [2020-07-20 11:48:56,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:56,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590942884] [2020-07-20 11:48:56,699 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 11:48:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 11:48:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:03,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590942884] [2020-07-20 11:49:03,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:03,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-20 11:49:03,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876273388] [2020-07-20 11:49:03,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 11:49:03,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 11:49:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=383, Unknown=3, NotChecked=0, Total=552 [2020-07-20 11:49:03,567 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2020-07-20 11:49:04,092 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-20 11:49:04,578 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-20 11:49:08,231 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-20 11:49:08,843 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-20 11:49:12,635 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-20 11:49:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:15,654 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-20 11:49:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 11:49:15,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-07-20 11:49:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:15,658 INFO L225 Difference]: With dead ends: 38 [2020-07-20 11:49:15,658 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:49:15,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=406, Invalid=713, Unknown=3, NotChecked=0, Total=1122 [2020-07-20 11:49:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:49:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:49:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:49:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-20 11:49:15,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2020-07-20 11:49:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:15,667 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-20 11:49:15,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 11:49:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-20 11:49:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 11:49:15,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:15,670 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:15,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:15,872 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 4 times [2020-07-20 11:49:15,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:15,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881441307] [2020-07-20 11:49:15,874 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 [2020-07-20 11:49:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 11:49:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:16,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 241 refuted. 12 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:48,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881441307] [2020-07-20 11:49:48,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:48,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-20 11:49:48,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806293059] [2020-07-20 11:49:48,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 11:49:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 11:49:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1619, Unknown=15, NotChecked=0, Total=2256 [2020-07-20 11:49:48,950 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 48 states. [2020-07-20 11:49:51,671 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-07-20 11:49:55,550 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 111 DAG size of output: 11 [2020-07-20 11:50:02,722 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 106 DAG size of output: 11 [2020-07-20 11:50:16,214 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 101 DAG size of output: 11 [2020-07-20 11:50:24,499 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 11 [2020-07-20 11:50:34,294 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-07-20 11:50:41,631 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 11 [2020-07-20 11:50:52,880 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 11 [2020-07-20 11:51:00,189 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-20 11:51:09,056 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-20 11:51:18,246 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-20 11:51:28,005 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-20 11:51:39,047 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-20 11:51:50,979 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-20 11:51:59,338 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-20 11:52:04,135 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-20 11:52:21,740 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-20 11:52:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:52:53,446 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-20 11:52:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 11:52:53,449 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 32 [2020-07-20 11:52:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:52:53,451 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:52:53,451 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:52:53,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 216.8s TimeCoverageRelationStatistics Valid=1676, Invalid=3127, Unknown=27, NotChecked=0, Total=4830 [2020-07-20 11:52:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:52:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 11:52:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:52:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-20 11:52:53,464 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2020-07-20 11:52:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:52:53,465 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-20 11:52:53,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 11:52:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-20 11:52:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 11:52:53,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:52:53,467 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:52:53,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:52:53,673 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:52:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:52:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 5 times [2020-07-20 11:52:53,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:52:53,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610055495] [2020-07-20 11:52:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:52:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:52:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-20 11:52:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:55,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:54:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1054 refuted. 27 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:54:10,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610055495] [2020-07-20 11:54:10,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:54:10,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-20 11:54:10,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461698013] [2020-07-20 11:54:10,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-20 11:54:10,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:54:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-20 11:54:10,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6689, Unknown=33, NotChecked=0, Total=9120 [2020-07-20 11:54:10,809 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 96 states. [2020-07-20 11:54:23,279 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2020-07-20 11:54:53,430 WARN L193 SmtUtils]: Spent 18.44 s on a formula simplification. DAG size of input: 231 DAG size of output: 11 [2020-07-20 11:55:16,868 WARN L193 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 226 DAG size of output: 11 [2020-07-20 11:55:50,240 WARN L193 SmtUtils]: Spent 11.63 s on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2020-07-20 11:55:52,274 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 40) 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 38) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 41) 4294967296) 1024) (< (mod (+ c_main_~y~0 39) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 42) 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024)) is different from false [2020-07-20 11:56:27,253 WARN L193 SmtUtils]: Spent 9.56 s on a formula simplification. DAG size of input: 211 DAG size of output: 11 [2020-07-20 11:56:29,307 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 40) 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 38) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 39) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024)) is different from false [2020-07-20 11:57:07,862 WARN L193 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 201 DAG size of output: 11 [2020-07-20 11:57:46,611 WARN L193 SmtUtils]: Spent 12.89 s on a formula simplification. DAG size of input: 196 DAG size of output: 16 [2020-07-20 11:57:48,630 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024)) is different from false [2020-07-20 11:58:23,349 WARN L193 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 186 DAG size of output: 11 [2020-07-20 11:58:53,580 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification. DAG size of input: 181 DAG size of output: 11 [2020-07-20 11:59:36,454 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2020-07-20 12:00:27,219 WARN L193 SmtUtils]: Spent 8.85 s on a formula simplification. DAG size of input: 171 DAG size of output: 11 [2020-07-20 12:01:10,501 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 166 DAG size of output: 11 [2020-07-20 12:01:52,273 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2020-07-20 12:02:34,851 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-20 12:03:27,653 WARN L193 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 151 DAG size of output: 11