java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:46,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:46,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:46,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:46,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:46,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:46,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:46,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:46,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:46,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:46,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:46,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:46,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:46,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:46,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:46,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:46,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:46,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:46,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:46,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:46,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:46,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:46,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:46,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:46,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:46,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:46,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:46,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:46,836 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 [2019-10-14 21:41:46,850 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:46,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:46,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:46,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:46,853 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:46,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:46,853 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:46,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:46,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:46,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:46,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:46,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:46,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:46,854 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:46,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:46,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:46,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:46,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:46,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:46,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:46,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:46,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:46,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:46,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:46,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:46,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:46,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:46,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:46,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:47,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:47,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:47,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:47,186 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:47,186 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:47,187 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-10-14 21:41:47,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8972cf740/337cbbbabae14987b8ce5b7ad5c436c7/FLAGf50304179 [2019-10-14 21:41:47,733 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:47,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2019-10-14 21:41:47,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8972cf740/337cbbbabae14987b8ce5b7ad5c436c7/FLAGf50304179 [2019-10-14 21:41:48,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8972cf740/337cbbbabae14987b8ce5b7ad5c436c7 [2019-10-14 21:41:48,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:48,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:48,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:48,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:48,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:48,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edcbd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48, skipping insertion in model container [2019-10-14 21:41:48,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,091 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:48,112 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:48,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:48,369 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:48,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:48,489 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:48,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48 WrapperNode [2019-10-14 21:41:48,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:48,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:48,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:48,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:48,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (1/1) ... [2019-10-14 21:41:48,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:48,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:48,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:48,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:48,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (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 [2019-10-14 21:41:48,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:48,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:48,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:48,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:48,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:48,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:48,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:48,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:48,613 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:48,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:48,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:48,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:48,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:48,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:48,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:48,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:49,022 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:49,022 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:41:49,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:49 BoogieIcfgContainer [2019-10-14 21:41:49,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:49,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:49,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:49,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:49,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:48" (1/3) ... [2019-10-14 21:41:49,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331962ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:49, skipping insertion in model container [2019-10-14 21:41:49,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:48" (2/3) ... [2019-10-14 21:41:49,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331962ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:49, skipping insertion in model container [2019-10-14 21:41:49,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:49" (3/3) ... [2019-10-14 21:41:49,032 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2019-10-14 21:41:49,043 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:49,054 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:49,066 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:49,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:49,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:49,099 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:49,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:49,100 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:49,100 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:49,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:49,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-14 21:41:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:49,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,125 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:49,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1272746570, now seen corresponding path program 1 times [2019-10-14 21:41:49,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029079808] [2019-10-14 21:41:49,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:49,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029079808] [2019-10-14 21:41:49,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:49,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:49,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119961177] [2019-10-14 21:41:49,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:49,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:49,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:49,361 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-10-14 21:41:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:49,536 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-14 21:41:49,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:49,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:49,550 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:41:49,551 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:41:49,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:41:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:41:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-14 21:41:49,632 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-14 21:41:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:49,632 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-14 21:41:49,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-14 21:41:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:49,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,637 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:49,638 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1923539238, now seen corresponding path program 1 times [2019-10-14 21:41:49,640 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470842058] [2019-10-14 21:41:49,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:49,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470842058] [2019-10-14 21:41:49,823 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:49,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:49,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316457254] [2019-10-14 21:41:49,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:49,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:49,833 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-10-14 21:41:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,070 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-14 21:41:50,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:50,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 21:41:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,073 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:41:50,073 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:50,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 21:41:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:41:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-14 21:41:50,086 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-14 21:41:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,087 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-14 21:41:50,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-14 21:41:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:41:50,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,089 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:50,090 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash -772301532, now seen corresponding path program 1 times [2019-10-14 21:41:50,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152985948] [2019-10-14 21:41:50,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:50,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152985948] [2019-10-14 21:41:50,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:50,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:50,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189426660] [2019-10-14 21:41:50,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:50,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:50,181 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-10-14 21:41:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,331 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-10-14 21:41:50,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:50,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-14 21:41:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,333 INFO L225 Difference]: With dead ends: 119 [2019-10-14 21:41:50,333 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:50,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:41:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:41:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-14 21:41:50,344 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-14 21:41:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,344 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-14 21:41:50,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-14 21:41:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:41:50,346 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,346 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:50,347 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash -213249118, now seen corresponding path program 1 times [2019-10-14 21:41:50,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823816323] [2019-10-14 21:41:50,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:50,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823816323] [2019-10-14 21:41:50,448 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:50,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:50,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770338580] [2019-10-14 21:41:50,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:50,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:50,451 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-10-14 21:41:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:50,651 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2019-10-14 21:41:50,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:50,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 21:41:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:50,653 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:41:50,653 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:41:50,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:41:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-10-14 21:41:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:41:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-14 21:41:50,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-14 21:41:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:50,670 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-14 21:41:50,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-14 21:41:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:41:50,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:50,675 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:50,675 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash 25817296, now seen corresponding path program 1 times [2019-10-14 21:41:50,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:50,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019051411] [2019-10-14 21:41:50,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:50,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:50,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019051411] [2019-10-14 21:41:50,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43299909] [2019-10-14 21:41:50,849 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:50,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:50,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:50,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:50,987 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347262831] [2019-10-14 21:41:50,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:50,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:50,989 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2019-10-14 21:41:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:51,190 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-10-14 21:41:51,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:51,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-10-14 21:41:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:51,192 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:41:51,193 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:41:51,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:41:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:41:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:41:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-14 21:41:51,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2019-10-14 21:41:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:51,208 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-14 21:41:51,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-14 21:41:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:41:51,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:51,210 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:51,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:51,415 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash -95536050, now seen corresponding path program 2 times [2019-10-14 21:41:51,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:51,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901939170] [2019-10-14 21:41:51,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:51,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:51,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901939170] [2019-10-14 21:41:51,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100071763] [2019-10-14 21:41:51,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:51,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:51,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:51,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:51,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:51,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:51,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:51,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637183306] [2019-10-14 21:41:51,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:51,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:51,723 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 8 states. [2019-10-14 21:41:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:52,002 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-10-14 21:41:52,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:52,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-14 21:41:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:52,004 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:41:52,004 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:41:52,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:41:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2019-10-14 21:41:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-14 21:41:52,018 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2019-10-14 21:41:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:52,018 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-14 21:41:52,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-14 21:41:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:52,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,020 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:52,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:52,221 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1296186118, now seen corresponding path program 3 times [2019-10-14 21:41:52,223 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609105981] [2019-10-14 21:41:52,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:56,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609105981] [2019-10-14 21:41:56,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985691976] [2019-10-14 21:41:56,343 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:56,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:56,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:56,420 WARN L254 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 108 conjunts are in the unsatisfiable core [2019-10-14 21:41:56,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:17,670 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:17,671 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-10-14 21:42:17,672 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-14 21:42:17,684 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:17,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:17,689 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:42:17,690 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-10-14 21:42:17,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:18,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:18,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:18,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:18,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 60] total 103 [2019-10-14 21:42:18,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689360079] [2019-10-14 21:42:18,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-10-14 21:42:18,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-10-14 21:42:18,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=10180, Unknown=0, NotChecked=0, Total=10506 [2019-10-14 21:42:18,409 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 103 states.